Progress Notes No. 217 - CiteSeerX

Progress Notes

Canadian Wildlife Service

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Progress Notes contain timely data and conclusions and are presented as a service to other wildlife biologists and agencies.

No. 217, June 2001

Standardizing and interpreting nesting records for Great Blue Herons in British Columbia

Ian E. Moul,a Ross G. Vennesland,b Megan L. Harris,c and Robert W. Butlerd Abstract Historical data on the number of nests and nesting success for 242 Great Blue Heron colonies in British Columbia from 1920 through 1999 were compiled. The methodologies for data collection differed over the years. We have developed and applied a standard methodology for collecting and interpreting nesting data to provide consistency for users of the data set. Introduction Survey data on the number of nesting Great Blue Herons Ardea herodias over wide geographical areas are often uneven and difficult to interpret (Dunn et al. 1985). Techniques have been developed to account for bias and missing data when estimating the number of breeding herons in a region (Dunn et al. 1985). As a first step, it is necessary to treat all data in a consistent manner. Our purpose here is to describe data collection methods and apply a protocol to the historical data to create a standardized data set for future analysis. The subspecies of Great Blue Heron inhabiting the coast of British Columbia (Ardea herodias fannini) was designated as “vulnerable” in 1997 by the Committee on the Status of Endangered Wildlife in Canada. The need to estimate population trends accurately has become essential as a means of measuring the success of recovery efforts (Butler and Baudin 2000; Gebauer and Moul 2000). Records of the number of nests and the reproductive success of Great Blue Herons in colonies in British Columbia date from 1920. These records range from anecdotal reports to data systematically collected during research projects. Over the years, these records have been compiled for various studies and have been presented in journals and government reports (e.g., Forbes et al. 1985; Elliott et al. 1989; Butler et al. 1995; Butler 1997). Interpretation of the data was left up to the individual user. Moreover, most of the variation in nesting success originates from failed nesting attempts (Vennesland 2000), which were not estimated in early censuses. The purpose of this paper is to provide a protocol for data collection and interpretation. a b c d

Methods Field data collection methodology Beginning in 1988, Breault (1988, 1989, 1990), followed by Moul (1991, 1992, 1993, 1994, 1995), established a methodology to measure heron nest success and productivity. Herons return to colonies beginning in late January and February. They require about 14 weeks to complete a reproductive cycle: courtship lasts about two weeks, incubation and egg laying about four weeks, and chick rearing about eight weeks. During a nesting season, at least six visits were to be made to each active colony. The first colony visit occurred from late March through mid May to establish the presence of nesting herons. Colonies in the southern portion of Vancouver Island began in late March, whereas colonies in the northern portion of the Strait of Georgia began as late as late May. A second colony visit between late April and early June was made to estimate the hatching date. With incubation and the hatching period being the most sensitive time for disturbance of the herons (Vos et al. 1985; Rodgers and Smith 1995), care was taken when approaching the colony to prevent disturbing the herons from nests. Calling chicks could be heard approximately 25 m from colonies. In addition, observations of herons presenting sticks to their mates near the expected hatching date were accepted as a sign of chick hatching (Butler 1997). Herons toss the shells of hatched eggs from nests as the eggs hatch, so we searched below the nests for shell fragments at the time of hatching at a few colonies habituated to people below their nests. Following the estimation of the earliest hatching date, the earliest fledging date (eight weeks later) was calculated, and three colony visits were timed to count chicks when they were about five, seven, and nine weeks old. Additional visits were planned to account for late-nesting pairs. A final colony visit was made in the fall, usually once the leaves had fallen in late November, to count all nests. Protocol applied to historical data Great Blue Heron nesting records were obtained from books and journal papers (Cannings et al. 1987; Elliott et al. 1989; Butler et al. 1995; Butler 1997), unpublished reports (Forbes et al. 1985; Breault 1988, 1989, 1990; Moul 1991, 1992, 1993, 1994, 1995, 1998a, 1998b, 1999a, 1999b, 2000a, 2000b; Gebauer 1995a, 1995b), and recent unpublished records collected by the authors. The data were fit into fixed numeric value fields so that the records would be in a suitable format for computer mapping and geographical information

P.O. Box 28, Manson’s Landing, Cortes Island, British Columbia, Canada V0P 1X0. 301-9154 Saturna Drive, Burnaby, British Columbia, Canada V3J 7K2. Lorax Environmental, 208 Spencer Road, RD 5, Lake Tarawera, Rotorua, New Zealand. Pacific Wildlife Research Center, Canadian Wildlife Service, Environment Canada, 5421 Robertson Road, Delta, British Columbia, Canada V4K 3N2. A member of the Environmental Conservation family

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Table 1 Text and numeric fields applied to historical Great Blue Heron nesting data Field name

Description

COLONY ID CODE COLONY NAME LOCALITY TOTAL NESTS ACTIVE NESTS SAMPLE SIZE SUCCESSFUL NESTS NUMBER OF CHICKS SOURCE

A unique colony identification code A geographic or cadastral name reference near to the site Name of nearest city, town, or local municipality The total number of nests counted, which may include old unused nests The total or estimated number of nests used in a given year The number of active nests used to estimate nest success and productivity The number of nests that fledged at least one chick The number of chicks that fledged from sampled nests A reference to the published or unpublished report used as a data source

system (GIS) applications (Table 1). These data are available in GIS format from the B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C., or from the Canadian Wildlife Service office in Delta, B.C. All colony records were assigned an alpha-numeric code: H for Great Blue Heron, followed by numerals to indicate the B.C. Ministry of Environment, Lands and Parks Wildlife Management Region and Management Unit and a three-digit colony number. For example, a colony in Stanley Park was assigned the code H208-002, where H refers to herons, 2 refers to Wildlife Management Region 2 (i.e., Lower Mainland), 08 refers to Management Unit 8 (i.e., north of the Fraser River and west of Mission), and -002 refers to colony number 2. All colony names that had previously incorporated a personal surname or a corporate name were changed to either a street name or some geographic feature near the site in question in order to address privacy concerns of landowners. The data were presented either as colony summaries or as observations at individual heron nests. Nest records were tallied (procedure B, below) from the latter to match other sites and to provide data for a summary for each year.

6) 7) 8) 9) 10)

11)

12)

A) Colony records For colony productivity summaries, the following procedure, assumptions, and default choices were used: 1) 2) 3)

4) 5)

13)

If no nest numbers were reported, yet the colony was listed as active, default to TOTAL NESTS = 1 and ACTIVE NESTS = 1. If no nest numbers were reported, yet the colony was listed as inactive, default to TOTAL NESTS = 1 and ACTIVE NESTS = 0. If the colony was reported as active and only the total number of nests was given, default to ACTIVE NESTS = TOTAL NESTS (see Dunn et al. 1985 for a method to derive a correction factor). If the colony was reported as active and only the number of active nests was given, default to TOTAL NESTS = ACTIVE NESTS. TOTAL NESTS must be greater than or equal to ACTIVE NESTS.

14)

15)

SAMPLE SIZE cannot be greater than ACTIVE NESTS. SUCCESSFUL NESTS cannot be greater than SAMPLE SIZE. If the colony was reported as successful, yet no numbers of successful nests were given, default to SUCCESSFUL NESTS = 1. If a range of years was reported, all years of that range were used. If a range of nest numbers was reported (either TOTAL NESTS or ACTIVE NESTS), the midpoint or lower whole number was used (if the result was a decimal). If a colony was reported to be active, yet no nest numbers were given, the number of nests reported to be active in the nearest year was used. If the year was midway between two years of differing known nest numbers, the lower number was used. If a range of years was given, the colony was reported to be active, and no nest numbers were given during those years, yet the colony size was reported within five years of the range, that number or the lower of two numbers was used for TOTAL NESTS and/or ACTIVE NESTS. When historic records represented a calculated ratio of chicks per active nest and a SAMPLE SIZE, the NUMBER OF CHICKS (in the sample set) was back-calculated to the nearest whole number. If chicks per successful nest were reported, it was assumed that only successful nests were recorded, and SAMPLE SIZE was left blank. If possible, the NUMBER OF CHICKS was back-calculated to the nearest whole number using the number of SUCCESSFUL NESTS. When cataloguing sources, reports were cited in preference to the original citation or personal communications.

B) Nest records For data on individual nests, the following procedure, assumptions, and default choices were used:

2

1)

2)

3)

4)

estimate of the number of active nests could be applied to these data. Our purpose here is to archive the raw data rather than estimate the number of nesting herons. The survey methods employed from 1988 onwards were more consistent than those used in years pre-1988 and allow for a comparison by region and, in some cases, by colony. Pre-1988 surveys hold value as historical benchmarks and may generally be compared at least at some abbreviated level (e.g., as chicks per successful nest) with more recent surveys. Vancouver Island and the Lower Mainland are relatively large geographical regions with many places for herons to nest, and it is expected that some colonies have been missed. In contrast, the Sunshine Coast is a comparatively small region, with easy access to beaches where herons forage and with many roads to provide access to potential nesting sites within about 2 km of the shore. Given the search effort over the past 20 years, it is less likely that colonies have been overlooked. We recommend that future researchers follow the protocol we outline in this note to provide consistency in data collection methods and interpretation of data sets.

A nest was scored as an ACTIVE NEST during the breeding season when birds were present in the nest and/or feces were observed on foliage or the ground below the nest. Following the breeding season, when leaves had fallen from nest trees, a nest was scored as having been active in the previous season if it appeared “well formed” and in “good condition” compared with obviously old and unused nests. Any record showing a nest to have been active for any duration of time during a nesting season was scored as an ACTIVE NEST. The SAMPLE SIZE in data sets of individual nests was defined as the sum of the ACTIVE NESTS selected to calculate the colony productivity summary. Sample nests were chosen for their ease of observation. The sample set also included some less easily observed nests where sightings of chicks were made during two or more colony visits if at least one of the sightings was within two weeks prior to the estimated fledging date. A nest was scored as a SUCCESSFUL NEST if one or more chicks were observed in the nest during two of the colony visits (weeks five, seven, or nine). The NUMBER OF CHICKS fledged from an individual nest was determined by the greatest number of chicks counted during colony visits on weeks five, seven, and nine.

Acknowledgements Funding for I.E. Moul and M. Harris was provided by the B.C. Habitat Conservation Trust Fund and the Canadian Wildlife Service, Environment Canada. We thank Myke Chutter and Don Norman for reviews of an earlier draft of this paper. References Breault, A.M. 1988. Productivity at Great Blue Heron colonies in the Strait of Georgia. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 53 pp.

Results and discussion Nine hundred and eight records representing 242 Great Blue Heron colonies from 1920 to 1999 were catalogued. There were 103 colony sites reported on Vancouver Island (Appendix 1), 86 colony sites in the Lower Fraser Valley, Sunshine Coast, and Powell River areas (Appendix 2), six colony sites on the North Coast and in the Queen Charlotte Islands (Appendix 3), and 47 colony sites in the interior of British Columbia (Appendix 4). Extensive search efforts in recent years in areas such as Vancouver Island and the Lower Fraser Valley suggest that the numbers given for these areas are more likely to approximate the actual number present than numbers given for the Queen Charlotte Islands, the North Coast, and interior regions, where less effort has been expended. There are several sources of potential error in our methodology. Defaulting so that TOTAL NESTS = ACTIVE NESTS in situations where counts were not made likely resulted in over- or underestimates of the true numbers present. Defaulting TOTAL NESTS, ACTIVE NESTS, or SUCCESSFUL NESTS to equal “1” likely underestimated the true number of nests in most cases. Defaulting to “1” was used as a “flag” for missing data or data irregularities. In addition, many colony records represented a single visit to a colony, which would increase the likelihood of missing nests occupied for a brief period before abandonment. This would result in an underestimate of the number of nesting starts and the nesting success of the colony. A method similar to that used by Dunn et al. (1985) to derive a correction factor for the

Breault, A.M. 1989. Distribution, abundance and productivity of Great Blue Heron colonies in the Strait of Georgia. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 82 pp. Breault, A.M. 1990. Monitoring program of fish-eating birds in the Strait of Georgia. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 74 pp. Butler, R.W. 1997. The Great Blue Heron. University of British Columbia Press, Vancouver, B.C. 167 pp. Butler, R.W.; Baudin, P.D. 2000. Status and conservation stewardship of the Pacific Great Blue Heron in Canada. Pages 247–250 in L.M. Darling (ed.), At risk. Proceedings of a conference on the biology and management of species and habitats at risk. Vol. 1. B.C. Ministry of Environment, Lands and Parks, Victoria, B.C.

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Butler, R.W.; Whitehead, P.E.; Breault, A.M.; Moul, I.E. 1995. Colony effects on fledging success of great blue herons (Ardea herodias) in British Columbia. Colonial Waterbirds 18(2):159–165.

Moul, I.E. 1995. Egg collections and numbers of herons and cormorants nesting near the Strait of Georgia, 1995. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 20 pp.

Cannings, R.A.; Cannings, R.J.; Cannings, S.G. 1987. Birds of the Okanagan Valley, British Columbia. Royal British Columbia Museum, Victoria, B.C. 420 pp.

Moul, I.E. 1998a. The location and status of heron colonies around the Strait of Georgia, Region 1, Vancouver Island. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 161 pp.

Dunn, E.H.; Hussell, D.J.T.; Siderius, J. 1985. Status of the Great Blue Heron, Ardea herodias, in Ontario. Can. Field-Nat. 99:62–70.

Moul, I.E. 1998b. The location and status of heron colonies around the Strait of Georgia, Region 2, Lower Fraser Valley, Sunshine Coast and Powell River area. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 146 pp.

Elliott, J.E.; Butler, R.W.; Norstrom, R.J.; Whitehead, P.E. 1989. Environmental contaminants and reproductive success of great blue herons Ardea herodias in British Columbia, 1986–87. Environ. Pollut. 59:91–114.

Moul, I.E. 1999a. The location and status of heron colonies for the Georgia Basin area of British Columbia, Region 1, Vancouver Island 1998. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 31 pp.

Forbes, L.S.; Simpson, K.; Kelsall, J.P.; Flook, D.R. 1985. Great Blue Heron colonies in British Columbia. Unpublished report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 66 pp.

Moul, I.E. 1999b. The location and status of heron colonies around the Strait of Georgia, Region 2, Lower Fraser Valley, Sunshine Coast and Powell River area 1998. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Surrey, B.C. 29 pp.

Gebauer, M.B. 1995a. Status and productivity of Great Blue Heron (Ardea herodias) colonies in the lower Fraser River valley in 1992, 1993 and 1994. Unpublished contract report. British Columbia Ministry of Environment, Lands and Parks, Surrey, B.C.

Moul, I.E. 2000a. The location and status of heron colonies for the Georgia Basin area of British Columbia, Region 1, Vancouver Island 1999. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 53 pp.

Gebauer, M.B. 1995b. Status and productivity of Great Blue Heron (Ardea herodias) colonies in the Howe Sound/ Whistler, Sunshine Coast and Powell River areas in 1993 and 1994. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Surrey, B.C. 50 pp. Gebauer, M.B.; Moul, I.E. 2000. Status of the Great Blue Heron in British Columbia. B.C. Ministry of Environment, Lands and Parks, Victoria, B.C.

Moul, I.E. 2000b. The location and status of heron colonies around the Strait of Georgia, Region 2, Lower Fraser Valley, Sunshine Coast and Powell River area 1999. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Surrey, B.C. 54 pp.

Moul, I.E. 1991. The breeding success of herons, eagles and cormorants nesting in the Strait of Georgia and Johnstone Strait. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 69 pp.

Rodgers, J.A., Jr.; Smith, H.T. 1995. Set-back distances to protect nesting bird colonies from human disturbance in Florida. Conserv. Biol. 9:89–99.

Moul, I.E. 1992. The breeding success of herons, eagles and cormorants nesting near the waters surrounding Vancouver Island, 1992. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 137 pp.

Vennesland, R.G. 2000. The effects of disturbance from humans and predation on breeding decisions of Great Blue Herons. M.Sc. Thesis, Simon Fraser University, Burnaby, B.C.

Moul, I.E. 1993. The breeding success of herons, eagles and cormorants nesting near the waters surrounding Vancouver Island, 1993. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 124 pp.

Vos, D.K.; Ryder, R.A.; Graul, W.D. 1985. Response of breeding Great Blue Herons to human disturbance in north central Colorado. Colonial Waterbirds 8:13–22.

Moul, I.E. 1994. The breeding success of herons and cormorants nesting near the Strait of Georgia, 1994. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 30 pp.

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For more information about the Canadian Wildlife Service or its other publications, please contact: Canadian Wildlife Service Environment Canada Ottawa, Ontario K1A 0H3 (819) 997-1095 (819) 997-2756 (fax) e-mail: [email protected] www.cws-scf.ec.gc.ca

Published by Authority of the Minister of the Environment ©Minister of Public Works and Government Services Canada, 2001 Catalogue No. CW69-9/217E-IN ISBN 0-662-30711-91 ISSN 0069-0023

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Appendix 1 Great Blue Heron colony records for Vancouver Island, British Columbia, 1920–1999 Colony ID code

Colony name

Locality

Year

Total nests

Active nests

Sample size

Successful nests

Number of chicks

H101-001 H101-001 H101-001 H101-001 H101-001 H101-001 H101-001 H101-002 H101-002 H101-002 H101-002 H101-003 H101-003 H101-003 H101-003 H101-003 H101-003 H101-003 H101-003 H101-003 H101-003 H101-004 H101-004 H101-004 H101-004 H101-004

Beacon Hill Beacon Hill Beacon Hill Beacon Hill Beacon Hill Beacon Hill Beacon Hill Government House Government House Government House Government House Tillicum Tillicum Tillicum Tillicum Tillicum Tillicum Tillicum Tillicum Tillicum Tillicum Sidney Island Sidney Island Sidney Island Sidney Island Sidney Island

Victoria Victoria Victoria Victoria Victoria Victoria Victoria Victoria Victoria Victoria Victoria Saanich Saanich Saanich Saanich Saanich Saanich Saanich Saanich Saanich Saanich Sidney Sidney Sidney Sidney Sidney

1999 1998 1997 1996 1990 1989 1988 1999 1998 1997 1996 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1997 1990 1989 1988 1987

48 20 10 12 27 55 64 0 5 6 7

46 20 10 12 27 31 50

7 7 1 3 0 19 37

10 17 2

6

0

11 14 13 26 18

0 13 0 8 12

16 44 99 103

48 20 10 12 27 55 63 0 0 6 7 0 0 0 0 0 11 17 24 44 21 0 16 44 99 85

16 44 75 85

0 0 58 54

H101-004

Sidney Island

Sidney

1986

86

51

H101-004 H101-004 H101-004 H101-005 H101-005 H101-005 H101-005 H101-005 H101-006 H101-006

Sidney Island Sidney Island Sidney Island McFadden Creek McFadden Creek McFadden Creek McFadden Creek McFadden Creek Southey Point Southey Point

Sidney Sidney Sidney Saltspring Island Saltspring Island Saltspring Island Saltspring Island Saltspring Island Saltspring Island Saltspring Island

1984 1979 1974 1999 1998 1997 1996 1990 1997 1989

41 75 30 131 120 118 118 1

41 75 30 131 120 118 118 1 0 21

41

0

26 17 21

13 16 19

25 35 51

21

15

28

2

11 17 24 44 21

25

45 74

23 24 31

135 125

Source Vennesland (2000) Moul (1999a) Moul (1998a) Moul (1998a) Breault (1990) Breault (1989) Breault (1988) Moul (2000) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1995) Moul (1994) Moul (1993) Moul (1992) Moul (1991) Breault (1990) Breault (1989) Moul (1998a) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Elliott et al. (1989) Butler (1997) Elliott et al. (1989) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1998a) Moul (1998a) Breault (1989) Continued on next page

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Appendix 1 (cont’d) Great Blue Heron colony records for Vancouver Island, British Columbia, 1920–1999 Colony ID code

Colony name

Locality

Year

H101-006 H101-007 H101-007 H101-007 H101-008 H101-008 H101-009 H101-009 H101-010 H101-010 H101-011 H101-011 H101-012 H101-013 H101-014 H101-014 H101-014 H101-015 H101-015 H101-015 H101-016 H101-017 H101-018 H101-019 H101-019 H101-020 H101-021 H101-021 H101-021 H101-021 H101-022 H101-022 H101-023 H101-024 H101-024 H101-025 H101-026 H102-001 H102-001

Southey Point Madrona Creek Madrona Creek Madrona Creek Heron Basin Heron Basin Colwood-CFB Colwood-CFB Cadboro Bay Cadboro Bay Inskip Island Inskip Island View Royal Chatham Island Gabriola Island Gabriola Island Gabriola Island Mandarti Island Mandarti Island Mandarti Island North Pender Portage Inlet Prevost Island Beddis Road Beddis Road Saturna Secretary Island Secretary Island Secretary Island Secretary Island Thetis Lake Thetis Lake South Pender Swartz Bay Swartz Bay Tsehum Harbour Saanichton Bay Whiffin Spit Whiffin Spit

Saltspring Island Saltspring Island Saltspring Island Saltspring Island Sidney Sidney Victoria Victoria Victoria Victoria Victoria Victoria Victoria Oak Bay Gabriola Island Gabriola Island Gabriola Island Sidney Sidney Sidney North Pender Victoria Saltspring Island Saltspring Island Saltspring Island Saturna Island Gulf Islands Gulf Islands Gulf Islands Gulf Islands Victoria Victoria S. Pender Island Sidney Sidney Sidney Saanich Sooke Sooke

1980 1997 1996 1994 1998 1997 1999 1998 1999 1998 1999 1998 1999 1929 1981 1980 1979 1950 1945 1936 1974 1977 1974 1985 1981 1920 1935 1934 1933 1932 1974 1962 1975 1970 1963 1957 1999 1999 1998

Total nests

Active nests

4

4 0 0 15 0 0 0 16 3 1 0 5 10 1 64 60 30 1 7 1 1 5 59 0 70 1 44 12 4 1 1 8 1 1 5

15 15 3 36 16 3 1 5 10 1 90 60 30 1 7 1 1 5 59 70 1 44 12 4 1 1 8 1 1 5 11 35 17 46

29 16 40

Sample size

Successful nests

Number of chicks

16

0

10

0

1

1

1

1

1

2

16 40

0 0

Source Forbes et al. (1985) Moul (1998a) Moul (1998a) Moul (1998a) Moul (1999a) Moul (1998a) Vennesland (2000) Moul (1999a) Moul (2000) Moul (1999a) Moul (2000) Moul (1999a) Moul (1999a) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Butler (1997) N. Raginsky (pers. comm.) N. Raginsky (pers. comm.) Forbes et al. (1985) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Moul (2000) Vennesland (2000) Moul (1999a) Continued on next page

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Colony name

Locality

Year


Whiffin Spit Whiffin Spit Whiffin Spit Whiffin Spit Whiffin Spit Mill Bay Mill Bay Mill Bay Otter Point Otter Point Stoney Creek Cherry Point Quamichan Lake Quamichan Lake Quamichan Lake Quamichan Lake Quamichan Lake Quamichan Lake Quamichan Lake Sahtlam Sahtlam Sahtlam Sahtlam Sahtlam Drinkwater Road Drinkwater Road Drinkwater Road Youbou Youbou Youbou Cobble Hill Cobble Hill Cowichan Cowichan Cowichan Bay Village Cowichan Bay Village Cowichan Bay Village Cowichan Bay Village Cowichan Bay Village

Sooke Sooke Sooke Sooke Sooke Mill Bay Mill Bay Mill Bay Sooke Sooke Sooke Cowichan Bay Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Duncan Cowichan Lake Cowichan Lake Cowichan Lake Duncan Duncan Duncan Duncan Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay

1997 1996 1992 1961 1960 1999 1998 1997 1961 1960 1961 1939 1997 1994 1993 1992 1991 1990 1989 1997 1996 1991 1990 1989 1999 1998 1997 1997 1990 1989 1979 1978 1990 1989 1979 1973 1952 1950 1945

Total nests

Active nests

Sample size

Successful nests

Number of chicks

50 43 41 20 23 15 14 8 8 6 2 1

31 43 41 12 23 9 14 8 8 6 2 1 0 0 11 19 28 28 32 0 0 0 3 6 71 26 19 0 1 1 1 6 1 1 28 12 32

31

7

14

9 14 3

0 3 3

7 7

11 19 27 28 30

0 0 24 20 27

61 56 68

3 6 34 26 19

2 4 27

3 9 46

5

14

1 1

1 1

2 4

1 1

0 0

11 19 28 28 32 11 15 3 6 85 26 35 1 1 1 6 1 1 34 12 32 32 2

2

Source Moul (1998a) Moul (1998a) Moul (1992) Butler (1997) Butler (1997) Vennesland (2000) Moul (1999a) Moul (1998a) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Moul (1998a) Moul (1994) Moul (1993) Moul (1992) Moul (1991) Breault (1990) Breault (1989) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Vennesland (2000) Moul (1999a) Moul (1998a) Moul (1998a) Breault (1990) Breault (1989) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Forbes et al. (1985) Butler (1997) Continued on next page

8


Colony name

Locality

Year

H104-007 H104-008 H104-008 H104-008 H104-008 H104-008 H104-009 H104-009 H104-009 H104-009 H104-009 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001

Cowichan Bay Village Cowichan Station Cowichan Station Cowichan Station Cowichan Station Cowichan Station Genoa Bay Genoa Bay Genoa Bay Genoa Bay Genoa Bay Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island

Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Cowichan Bay Crofton Crofton Crofton Crofton Crofton Crofton Crofton Crofton Crofton Crofton Crofton Crofton

1931 1979 1977 1975 1973 1972 1979 1975 1972 1971 1970 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987

H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-001 H105-002 H105-002 H105-002 H105-002 H105-002 H105-002 H105-002 H105-002

Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Shoal Island Holden Lake Holden Lake Holden Lake Holden Lake Holden Lake Holden Lake Holden Lake Holden Lake

Crofton Crofton Crofton Crofton Crofton Crofton Crofton Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo

1986 1982 1979 1975 1974 1973 1970 1999 1998 1997 1996 1995 1994 1993 1992

Total nests

Active nests

8

8 0 8 27 12 7 9 0 10 22 13 0 0 0 40 63 63 61 47 32 25 35 57

8 27 12 9 9 17 22 16 20 40 63 63 61 47 32 25 35 60 64 20 1 75 130 59 40 43 21 72 90 90 104 101 115

Sample size

40 57 52 52 42 31 25 35 60

64 1 75 85 52 40 26 21 16 72 90 83 86 113

Successful nests

0 22 14 16 30 22 21 0 0

Number of chicks

62 36 34 75 69 55

40

20 20 16

8 17 3

17 44 5

86 78

39 73

65 154

Source Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1995) Moul (1994) Moul (1993) Moul (1992) Moul (1991) Breault (1990) Moul (1990) Moul (1990) Butler (1989) Elliott et al. (1989) Elliott et al. (1989) Forbes et al. (1985) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Vennesland (2000) Moul (1999a) Moul (1999a) Moul (1998a) Moul (1995) Moul (1994) Moul (1993) Moul (1992) Continued on next page

9


Colony name

Locality

Year


Holden Lake Holden Lake Holden Lake Holden Lake Hammond Bay Hammond Bay Hammond Bay Hammond Bay Hammond Bay Brannen Lake Brannen Lake Brannen Lake Northwest Bay Northwest Bay Northwest Bay Northwest Bay Northwest Bay Soriel Road Soriel Road Soriel Road Protection Island Protection Island Protection Island Beachcomber Beachcomber Beachcomber Cottle Creek Cottle Creek Jingle Pot Road Ladysmith Cedar Road Extention Extention Extention Yellowpoint Nanoose Parksville Acacia Road Acacia Road

Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Nanaimo Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Nanaimo Nanaimo Nanaimo Nanoose Bay Nanoose Bay Nanoose Bay Nanaimo Nanaimo Nanaimo Ladysmith Nanaimo Nanaimo Nanaimo Nanaimo Ladysmith Nanoose Bay Parksville Parksville Parksville

1991 1990 1989 1988 1992 1991 1990 1989 1988 1997 1992 1991 1997 1992 1991 1990 1989 1998 1997 1993 1999 1998 1997 1999 1998 1997 1999 1998 1999 1939 1981 1981 1980 1972 1972 1980 1981 1992 1991

Total nests

Active nests

Sample size

Successful nests

Number of chicks

120 132 162 100 0 15 19 16 24 0 7 2 0

90 132 162 100 0 15 19 16 24 0 7 2 0 0 8 11 8 0 0 4 0 0 5 3 12 5 0 7 0 1

37 45 44

31 36 38 41

53 107 73 75

15 17 15 22

0 14 9 13

37 19 21

7

0

8 8

1 8 7

2 28 19

3 12

0 4

7

1 1

0 0

8 11 8 1 4 9 5 10 12 5 4 7 0 1 60 1 1 3 10 8 6 1 1

1 1 3 10 8 6 1 1

Source Moul (1991) Breault (1990) Breault (1989) Breault (1988) Moul (1992) Moul (1991) Breault (1990) Breault (1989) Breault (1988) Moul (1998a) Moul (1992) MELP files Moul (1998a) Moul (1992) Moul (1991) Breault (1990) Breault (1989) Moul (1999a) Moul (1998a) Moul (1993) Moul (2000) Moul (1999a) Moul (1998a) Vennesland (2000) Moul (1999a) Moul (1998a) Moul (2000) Moul (1999a) Moul (2000) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Forbes et al. (1985) Butler (1997) Forbes et al. (1985) Moul (1992) Moul (1991) Continued on next page

10


Colony name

Locality

Year


Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Acacia Road Gravel Pitt Gravel Pitt Industrial Way Industrial Way Englishman River North-west North-west North-west North-west North-west North-west North End North End North End North End North End North End North End Denman Point Denman Point Denman Point Denman Point Denman Point Denman Point Denman Point

Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Parksville Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island Denman Island

1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1990 1989 1988 1987 1999 1998 1997 1996 1991 1990 1989 1998 1997 1996 1991 1990 1989 1980 1999 1998 1997 1996 1991 1990 1989

Total nests

Active nests

Sample size

Successful nests

Number of chicks

1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 9 4 1 4 13 22 22 14 4 17 0 5 5 5 18 5 9 11

1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 9 4 1 4 0 3 22 14 4 17 0 0 0 5 18 5

1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 9

1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 9 0

4 4

3

1

14 4 17

2 1 16

4 3 46

5 18 5

0 0 2

5

3

0

22 24 20

11 15 13

0 0 3 11 22 24 24

11 11 22 24 24

23

29 46 37

Source Butler (1997) Butler (1997) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Moul (1992) Butler (1997) Butler (1997) Breault (1988) Breault (1988) Moul (2000) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Forbes et al. (1985) Vennesland (2000) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Continued on next page

11


Colony name

Locality

Year


Fillongley South Fillongley South Fillongley South Fillongley South Landing Landing Landing Landing Landing Tralee 1 Tralee 1 Tralee 1 Tralee 1 Tralee 1 Tralee 1 Tralee 2 Tralee 2 Tralee 2 Tralee 2 Tralee 2 Tralee 2 Tralee Point Tralee Point Tralee Point Tralee Point Tralee Point Tralee Point Fanny Bay Fanny Bay Fanny Bay Fanny Bay Union Bay South Union Bay South Union Bay South Union Bay South Union Bay North Union Bay North Union Bay North Union Bay North

Denman Island Denman Island Denman Island Denman Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Fanny Bay Fanny Bay Fanny Bay Fanny Bay Union Bay Union Bay Union Bay Union Bay Union Bay Union Bay Union Bay Union Bay

1996 1991 1990 1989 1998 1997 1991 1990 1989 1998 1997 1996 1991 1990 1989 1998 1997 1996 1991 1990 1989 1999 1998 1997 1996 1991 1990 1997 1996 1991 1988 1997 1996 1992 1991 1997 1996 1991 1988

Total nests

Active nests

13 13 18 15 0 0 10 9 7 0 7 7 0 17 15 0 12 12 26 9 18 53 50 40 50 0 32 3 3 10 15 0

0 0 18 15 0 0 10 9 7 0 0 0 0 17 15 0 0 2 26 9 18 50 44 38 50 0 32 0 0 0 15 0 0 0 6 0 0 0 6

8 0 0 2 6

Sample size

Successful nests

Number of chicks

15 14

5 7

15 16

10 5 6

0 4 6

11 22

17 15

4 15

10 34

23 9 18 50 44 24

18 1 17 13 36 17

38 3 48 23 62 48

24

22

42

15

3

7

6

3

6

Source Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Moul (1999a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Breault (1989) Vennesland (2000) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1991) Breault (1990) Moul (1998a) Moul (1998a) Moul (1991) Breault (1988) Moul (1998a) Moul (1998a) Moul (1992) Moul (1991) Moul (1998a) Moul (1998a) Moul (1991) Breault (1988) Continued on next page

12


Colony name

Locality

Year


Union Bay Union Bay Little River Little River Little River Little River Little River Little River Little River Royston Royston Royston Kitty-coleman Creek Kitty-coleman Creek Kitty-coleman Creek Cougar Creek Rosewall Creek Cook Creek Cougar Smith Creek Cumberland Road Bowser Bowser Killman Road Whalebone Point Whalebone Point C.R. Airport Hornby Hornby Hornby Hornby Hornby St. John’s Point Somass River Somass River Alberni Inlet west Elk Falls Tree Nursery A Tree Nursery B Tree Nursery C

Union Bay Union Bay Comox Comox Comox Comox Comox Comox Comox Royston Royston Royston Merville Merville Merville Fanny Bay Fanny Bay Fanny Bay Fanny Bay Comox Bowser Bowser Union Bay Denman Island Denman Island Campbell River Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Hornby Island Port Alberni Port Alberni Port Alberni Campbell River Campbell River Campbell River Campbell River

1999 1998 1998 1997 1996 1992 1991 1990 1989 1999 1998 1997 1999 1998 1997 1987 1987 1987 1987 1980 1976 1975 1999 1981 1980 1988 1966 1962 1961 1960 1959 1962 1992 1971 1999 1987 1987 1988 1988

Total nests

Active nests

26 5 0 14 24 44 28 27 22 27 30 19 31 31 25 2 10 2 9 19

19 0 0 0 0 44 28 27 22 27 25 18 1 17 19 2 10 2 9 19 0 18 5 70 45 1

18 5 70 45 1 34 16 33 30 30 1

Sample size

Successful nests

32 25 20 18 27 25 5 1 17 8

32 24 16 16 0 9 5 0 0 8

10

0

3

0

16 30 30 1 0 10 0 10 0 3 2

10 10 15 3 2

Number of chicks

72 57 62 44 23 13 14

Source M.B. Gebauer (unpublished) Moul (1999a) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1992) Moul (1991) Breault (1990) Breault (1989) Vennesland (2000) Moul (1999a) Moul (1998a) Vennesland (2000) Moul (1999a) Moul (1998a) MELP files MELP files MELP files MELP files Butler (1997) Forbes et al. (1985) Butler (1997) Moul (2000) Forbes et al. (1985) Forbes et al. (1985) Breault (1988) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Moul (1992) Butler (1997) Moul (2000) MELP files MELP files Breault (1988) Breault (1988) Continued on next page

13


Colony name

Locality

Year

H110-005 H112-001 H112-002 H115-001 H115-001 H115-001 H115-001 H115-001 H115-001 H115-001 H115-001 H115-002 H115-002 H115-002 H115-003 H115-003 H115-003 H115-003 H115-003 H115-004 H115-005 H115-006 H115-006 H115-006 H115-006 H115-007 H115-008

Menzies Bay Ceepeecee Tahsis Smelt Bay Smelt Bay Smelt Bay Smelt Bay Smelt Bay Smelt Bay Smelt Bay Smelt Bay Hague Lake Hague Lake Hague Lake Whaletown Whaletown Whaletown Whaletown Whaletown Gowlland Island Heriot Bay Hyacinthe Bay Hyacinthe Bay Hyacinthe Bay Hyacinthe Bay Yaculta Village Cape Mudge

Campbell River Ceepeecee Tahsis Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Cortes Island Quadra Island Quadra Island Quadra Island Quadra Island Quadra Island Quadra Island Quadra Island Quadra Island

1997 1991 1989 1999 1998 1997 1996 1992 1991 1980 1979 1997 1996 1993 1998 1997 1996 1993 1988 1988 1999 1989 1988 1980 1979 1987 1988

Total nests

Active nests

1 4 10 3 5 0 0 12 11

4 10 3 2 0 0 12 11 0 22 0 0 7 0 0 0 4 5 0 5 5 3 0

22 0 3 7 3 3 4 6 4 5 5 3 8 1 20

1 0

Abbreviations used: CFB = Canadian Forces Base MELP = B.C. Ministry of Environment, Lands and Parks

14

Sample size

Successful nests

12 10

2 5

5 5 3

0 0 3

Number of chicks

2 11

Source MELP files MELP files Breault (1989) Moul (2000) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1992) Moul (1991) Forbes et al. (1985) Butler (1997) Moul (1998a) Moul (1998a) Moul (1998a) Moul (1999a) Moul (1998a) Moul (1998a) Moul (1998a) G. Sirk (pers. comm.) Breault (1988) Moul (2000) Moul (2000) Moul (2000) Forbes et al. (1985) Forbes et al. (1985) Breault (1988) Breault (1988)

Appendix 2 Great Blue Heron colony records for the Lower Fraser Valley, Sunshine Coast, and Powell River areas, British Columbia, 1920–1999 Colony ID code

Colony name

Locality

Year

Total nests

Active nests

H202-001 H202-001 H204-001

Greenwood Island Greenwood Island Point Roberts

Hope Hope Point Roberts

1979 1973 1999

10 1 322

10 1 322

H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-001 H204-002 H204-002 H204-002 H204-002 H204-002 H204-002 H204-002 H204-002 H204-002 H204-002 H204-002 H204-003 H204-003 H204-003

Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Nicomekl Serpentine Serpentine Serpentine

Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Point Roberts Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Surrey Surrey Surrey

1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1981 1980 1979 1978 1977 1974 1973 1970 1999 1998 1997 1995 1994 1993 1992 1990 1988 1987 1986 1999 1998 1997

337 393 444 472 414 400 474 387 300 253 335 253 220 220 250 247 226 216 30 30 1 34 37 30 35 30 36 36 40 38 55 23

304 294 444 472 414 400 235 387 300 253 335 253 220 220 222 236 210 183 30 30 1 34 37 30 35 30 36 36 40 38 55 23 0 8 10

8 13

Sample size

Successful nests

Number of chicks

140

134

231

272 328

233

534 537

25

25

76

50 53 33 39 39

50 53 33 39 39

122 156 96 98 109

30 37 7

15 36 7

36 93 19

34 37 30 55 23

32 37 25 29 12

108 81 59

8 10

0 9

25 22

Source Butler (1997) Forbes et al. (1985) Vennesland (2000) A. Eissinger (pers. comm.) A. Eissinger (pers. comm.) A. Eissinger (pers. comm.) A. Eissinger (pers. comm.) Butler (1997) Butler (1997) Butler (1997) Gebauer (1995a) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Vennesland (2000) Moul (1998b) Butler (1997) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Butler (1997) Butler (1997) Elliott et al. (1989) Elliott et al. (1989) Vennesland (2000) Vennesland (2000) Moul (1998b) Continued on next page

15

Appendix 2 (cont’d) Great Blue Heron colony records for the Lower Fraser Valley, Sunshine Coast, and Powell River areas, British Columbia, 1920–1999 Colony ID code H204-003 H204-004 H204-004 H204-004 H204-004 H204-004 H204-004 H204-005 H204-005 H204-005 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-006 H204-007 H204-007 H204-007 H204-007 H204-007 H204-008 H204-008 H204-008 H204-008 H204-009 H204-009 H204-009 H204-009 H204-009 H204-009 H204-009

Colony name Serpentine South # 7 Road South # 7 Road South # 7 Road South # 7 Road South # 7 Road South # 7 Road Cessna Way Cessna Way Cessna Way Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach Derby Reach N Delta River Road N Delta River Road N Delta River Road N Delta River Road N Delta River Road Chilliwack City Chilliwack City Chilliwack City Chilliwack City CFB Chilliwack CFB Chilliwack CFB Chilliwack CFB Chilliwack CFB Chilliwack CFB Chilliwack CFB Chilliwack

Locality

Year

Surrey Richmond Richmond Richmond Richmond Richmond Richmond Richmond Richmond Richmond Langley Langley Langley Langley Langley Langley Langley Langley Langley Langley Langley Langley Langley North Delta North Delta North Delta North Delta North Delta Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack

1994 1997 1992 1991 1989 1987 1984 1997 1992 1981 1997 1994 1993 1992 1991 1981 1980 1979 1978 1977 1976 1975 1974 1998 1997 1994 1993 1992 1998 1997 1994 1993 1999 1998 1997 1994 1993 1992 1980

Total nests

Active nests

5 0 12 12 16 7 1 2 12 4 5 0 0 37 40 33 38 38 31 16 20 18 17

5 0 12 12 12 7 1 0 0 4 0 0 0 0 40 31 30 38 31 16 20 18 17 0 0 0 0 6 0 15 12 5 114 83 80 140 140 152 91

0 6 0 15 15 5 114 83 93 140 140 152 104

Sample size

6 12

40 15

Successful nests

Number of chicks

0 0

3

7

0 12

32

12

37

6

0

15

0

27 83 12

22 82 8

44 184 18

152

54 43

152 113

Source Gebauer (1995a) Moul (1998b) Gebauer (1995a) Butler (1997) Gebauer (1995a) Butler (1997) Forbes et al. (1985) Moul (1998b) Gebauer (1995a) Forbes et al. (1985) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Vennesland (2000) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Forbes et al. (1985) Continued on next page

16


Colony name CFB Chilliwack CFB Chilliwack CFB Chilliwack CFB Chilliwack Vedder Canal Vedder Canal Vedder Canal Boundary Bay Boundary Bay Boundary Bay Tilbury Island Tilbury Island White Rock Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Crescent Beach Sea Island 2 Sea Island 2 Fort Langley Fort Langley Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Douglas Island Douglas Island Poplar Island Poplar Island McGillivray Slough McGillivray Slough McGillivray Slough McMillian Island

Locality

Year

Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Chilliwack Delta Delta Delta Delta Delta White Rock South Surrey South Surrey South Surrey South Surrey South Surrey South Surrey Richmond Richmond Langley Langley Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Tsawwassen Port Coquitlam Port Coquitlam New Westminster New Westminster Sumas Mt. Sumas Mt. Sumas Mt. Fort Langley

1979 1978 1977 1976 1999 1998 1997 1998 1997 1996 1999 1998 1962 1980 1979 1978 1977 1968 1967 1992 1987 1963 1944 1961 1960 1959 1958 1956 1955 1949 1948 1977 1973 1974 1973 1977 1974 1920 1964

Total nests

Active nests

110 101 96 50 3 2 3

109 101 88 50 3 2 3 0 0 0 12 8 1 41 42 46 37 1 1 12 7 12 1 1 0 100 100 85 85 185 165 1 1 10 1 46

14 12 8 1 41 42 46 39 1 1 12 7 12 1 1 100 100 85 85 185 165 1 1 10 1 51 27 1 35

1 35

Sample size

Successful nests

Number of chicks

34

89

3 2 3

0 2 3

5 10

10 8

8 8

19 22

22 13 17 18

50 40 47 53

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Vennesland (2000) Moul (1999b) Moul (1999b) Moul (1998b) Butler (1997) Vennesland (2000) Vennesland (2000) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Continued on next page

17


Colony name Mount Lehman Mount Lehman Sea Island 1 Sea Island 1 Sea Island 1 Sea Island 1 Paq Lake Paq Lake Paq Lake Paq Lake Halfmoon Bay Halfmoon Bay Halfmoon Bay Halfmoon Bay Halfmoon Bay Acorn Street Acorn Street Acorn Street Acorn Street Acorn Street Stewart Road Stewart Road Stewart Road Storm Bay Storm Bay Sutton Islets Sutton Islets Sutton Islets Sutton Islets Sutton Islets Earles Cove Town-site Twin Creeks Twin Creeks Twin Creeks Gunboat Bay Gunboat Bay Gunboat Bay Gunboat Bay

Locality

Year

Abbotsford Abbotsford Richmond Richmond Richmond Richmond Pender Harbour Pender Harbour Pender Harbour Pender Harbour Halfmoon Bay Halfmoon Bay Halfmoon Bay Halfmoon Bay Halfmoon Bay Sechelt Sechelt Sechelt Sechelt Sechelt Gibsons Gibsons Gibsons Sechelt Inlet Sechelt Inlet Egmont Egmont Egmont Egmont Egmont Earles Cove Gibsons Landing Gibsons Landing Gibsons Landing Gibsons Landing Pender Harbour Pender Harbour Pender Harbour Pender Harbour

1988 1970 1949 1945 1943 1941 1997 1994 1993 1992 1999 1998 1997 1994 1993 1999 1998 1997 1994 1993 1997 1994 1993 1997 1993 1999 1998 1997 1994 1993 1999 1977 1980 1979 1978 1981 1980 1979 1978

Total nests

Active nests

1 10 40 40 40 40 0 8 10 5 5 3 7 19 16 5 2 6 1 11

1 10 40 40 40 40 0 8 10 5 3 3 0 19 14 5 2 6 1 11 0 2 4 0 10 0 5 0 1 10 1 10 2 1 54 0 0 44 43

2 4 10 5 0 1 10 1 10 2 1 54 30 0 94 93

Sample size

Successful nests

Number of chicks

10 5 3

8 1 0

11 2

14 5 2 6

12 0 0 1

20

11

3

6

2 4

0 0

5

0

1

1

2

2 0 0

2

18 19

54 40

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Moul (1998b) Gebauer (1995b) Gebauer (1995b) Moul (1992) Vennesland (2000) Moul (1999b) Moul (1998b) Gebauer (1995b) Gebauer (1995b) Vennesland (2000) Moul (1999b) Moul (1998b) Gebauer (1995b) Gebauer (1995b) Moul (1998b) Butler (1997) Butler (1997)) Moul (1998b) Gebauer (1995b) Vennesland (2000) Vennesland (2000) Moul (1998b) Gebauer (1995b) Gebauer (1995b) M.B. Gebauer (unpublished) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Continued on next page

18

Appendix 2 (cont’d) Great Blue Heron colony records for the Lower Fraser Valley, Sunshine Coast, and Powell River areas, British Columbia, 1920–1999 Colony ID code

Colony name

Locality

Year

Total nests

Active nests

H205-010 H205-010 H205-011 H207-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001

Gunboat Bay Gunboat Bay Tuwanek Brackendale Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park

Pender Harbour Pender Harbour Sechelt Squamish Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver

1977 1963 1999 1993 1999 1998 1997 1996 1994 1993 1992 1990 1989 1988 1987

75 75 5 5 188 190 119 217 169 162 142 157 141 158 214

75 75 3 0 174 190 75 217 169 162 142 140 141 158 156

H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-001 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002 H208-002

Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Pacific Spirit Park Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium

Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver

1986 1981 1980 1979 1978 1977 1974 1973 1972 1971 1970 1999 1998 1997 1995 1994 1993 1992 1991 1990 1989 1987 1981

78 150 147 130 128 92 1 1 30 75 127 3 3 20 19 17 30 33 19 30 30 31 29

78 125 130 130 108 82 1 1 30 75 120 3 3 19 19 16 30 33 19 30 30 31 20

Sample size

Successful nests

Number of chicks

3

0

174 190 38

106 70 20

233 102 48

49 20 12 17 156

39 17 10 14 126

100 48 22 36 233

78

46 42 51 22 30 23

92 81 122 64 83 50

3 19 19 16

0 0 0 19 16

49 38

32

31

90

9

38 38 56 20

15 20 16

Source Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Butler (1997) Vennesland (2000) Vennesland (2000) Moul (1998b) Butler (1997) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) J.E. Elliott (pers. comm.) J.E. Elliott (pers. comm.) Butler (1997) (pers. comm.) Butler (1997) Elliott et al. (1989) Elliott et al. (1989) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Vennesland (2000) Moul (1998b) Butler (1997) Butler (1997) Gebauer (1995a) Gebauer (1995a) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Continued on next page

19


Colony name Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Stanley Park Aquarium Cliff Street Cliff Street Cliff Street Cliff Street Cliff Street Cliff Street Admiralty Point Mary Hill Mary Hill Mary Hill Mary Hill Mary Hill Mary Hill McIvor Road McIvor Road McIvor Road McIvor Road McIvor Road McIvor Road McIvor Road North Alouette River North Alouette River North Alouette River North Alouette River North Alouette River North Alouette River Rennie Road Rennie Road Rennie Road McCormick Marsh McCormick Marsh McCormick Marsh McCormick Marsh Crescent Island Crescent Island

Locality

Year

Vancouver Vancouver Vancouver Vancouver Burnaby Burnaby Burnaby Burnaby Burnaby Burnaby Port Moody Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Matsqui Matsqui Matsqui Matsqui Matsqui Matsqui

1980 1979 1978 1977 1999 1998 1997 1994 1993 1992 1994 1999 1998 1997 1994 1993 1992 1997 1994 1993 1992 1979 1978 1977 1997 1994 1993 1992 1991 1974 1997 1993 1992 1997 1993 1992 1989 1997 1992

Total nests

Active nests

33 40 44 31 50 50 20 20 20 20 10 107 108 62 52 22 16 0 43 30 10 8 10 10 0

33 38 44 19 50 50 20 20 20 20 10 107 108 62 52 22 16 0 43 30 10 5 8 10 0 0 0 0 70 10 0 4 0 0 0 0 40 0 0

65 70 10 0 6 6 0 0 12 40 0 0

Sample size

Successful nests

Number of chicks

19 38 22 12

39 91 56 28

50

48

141

17 45 62

17 35 0

38 84

11

11

16

5 6 8

15 13 15

38

4

0

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Vennesland (2000) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Butler (1997) Butler (1997) Butler (1997) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Butler (1997) Moul (1998b) Gebauer (1995a) Butler (1997) Moul (1998b) Gebauer (1995a) Gebauer (1995a) P. Whitehead (pers. comm.) Moul (1998b) Gebauer (1995a) Continued on next page

20


Colony name Crescent Island Crescent Island Crescent Island Crescent Island Crescent Island Crescent Island De Boville Slough 1 De Boville Slough 1 De Boville Slough 1 De Boville Slough 1 De Boville Slough 2 De Boville Slough 2 De Boville Slough 2 De Boville Slough 2 Colony Farm Colony Farm Colony Farm Colony Farm Colony Farm Colony Farm Colony Farm Clayburn Clayburn Clayburn Clayburn Alouette River Alouette River Alouette River Mission - Silvermere Mission - Silvermere Mission - Silvermere Hatzic Lake Hatzic Lake Horseshoe Bay Rippington Road Rippington Road Rippington Road Port Coquitlam IR 2 Port Coquitlam IR 2

Locality

Year

Matsqui Matsqui Matsqui Matsqui Matsqui Matsqui Coquitlam Coquitlam Coquitlam Coquitlam Coquitlam Coquitlam Coquitlam Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Port Coquitlam Matsqui Matsqui Matsqui Matsqui Maple Ridge Maple Ridge Maple Ridge Mission Mission Mission Mission Mission West Vancouver Pitt Meadows Pitt Meadows Pitt Meadows Port Coquitlam Port Coquitlam

1991 1990 1974 1963 1962 1960 1997 1994 1993 1992 1997 1994 1993 1992 1997 1994 1993 1992 1978 1977 1973 1997 1995 1994 1993 1999 1998 1997 1999 1998 1997 1999 1998 1999 1981 1980 1979 1980 1979

Total nests

Active nests

6 8 1 1 3 0 0 0 34 70 0 34 34 50 0 1 1 4 162 169 59 0

0 0 1 1 3 0 0 0 34 70 0 0 34 50 0 0 1 4 162 169 48 0 0 0 2 120 86 63 39 60 10 67 65 2 6 4 1 26 31

7 120 86 63 45 60 10 67 65 2 8 6 1 26 34

Sample size

Successful nests

Number of chicks

6

0

34 59

0 0

34 50

0 38

72

1 4

0 2 43 42

8 99 97

2 64 66

0 49 66

79 171

36 60

27 56

51 119

56 45 2

47 45 2 4 4

112 117 8 10 13

26

26 17

55 30

Source Butler (1997) Gebauer (1995a) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Moul (1998b) Gebauer (1995a) Butler (1997) Gebauer (1995a) Moul (1998b) Butler (1997) Gebauer (1995a) Gebauer (1995a) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Butler (1997) Butler (1997) Butler (1997) Moul (1998b) Gebauer (1995a) Butler (1997) Gebauer (1995a) Vennesland (2000) Vennesland (2000) Moul (1998b) Vennesland (2000) Vennesland (2000) Moul (1998b) Vennesland (2000) Vennesland (2000) Vennesland (2000) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Continued on next page

21


Colony name Port Coquitlam IR 2 Port Coquitlam IR 2 Port Coquitlam IR 2 Widgeon Creek UBC - Marine Drive UBC - Marine Drive UBC - Marine Drive UBC - Marine Drive Lion’s Bay Alice Lake UBC Research Forest UBC Research Forest UBC Research Forest UBC Research Forest UBC Research Forest UBC Research Forest Ruskin Ruskin Ruskin Burnaby Lake Burnaby Lake Burnaby Mountain Burnaby Mountain Nature Park Nature Park Dewdney 2 Dewdney 2 Dewdney 2 Dewdney 3 Dewdney 3 Dewdney 1 Dewdney 1 Dewdney 1 North Vancouver North Vancouver Crane Ponds Crane Ponds Crane Ponds Stanley Park - Beaver L

Locality

Year

Port Coquitlam Port Coquitlam Port Coquitlam Pitt Meadows UBC UBC UBC UBC Lion’s Bay Squamish Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Pitt Meadows Maple Ridge Maple Ridge Maple Ridge Burnaby Burnaby Burnaby Burnaby Port Coquitlam Port Coquitlam Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge Maple Ridge N. Vancouver N. Vancouver Pitt Meadows Pitt Meadows Pitt Meadows Vancouver

1978 1977 1973 1979 1973 1972 1971 1970 1980 1993 1980 1979 1978 1977 1975 1974 1964 1963 1925 1942 1933 1996 1992 1973 1971 1971 1970 1963 1974 1973 1974 1973 1972 1929 1923 1981 1980 1979 1977

Total nests

Active nests

162 169 59 2 1 30 67 130 4 1 13 10 10 10 10 10 35 30 1 1 1 20 20

162 169 48 2 1 30 67 130 4 1 10 10 10 10 10 10 35 30 1 1 1 20 20 0 68 0 30 20 0 9 0 9 11 1 18 0 0 1 19

76 0 30 20 0 9 0 9 11 1 18 5 1 1 31

Sample size

Successful nests

Number of chicks

43 42

99 98

67

67

174

68

68

190

1

1 12

1 28

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Butler (1997) Butler (1997) Forbes et al. (1985) Continued on next page

22


Colony name Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Stanley Park - Beaver L Fraser Mills Scuttle Bay Scuttle Bay Gibsons Beach Gibsons Beach Gibsons Beach Gibsons Beach Gibsons Beach Willingdon Beach Willingdon Beach Willingdon Beach Willingdon Beach Willingdon Beach Willingdon Beach Willingdon Beach Willingdon Beach Hazelton Street Hazelton Street Hazelton Street Hazelton Street Penticton Street Penticton Street Penticton Street Penticton Street Penticton Street Penticton Street Myrtle Beach

Locality

Year

Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Vancouver Maillardville Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River Powell River

1974 1971 1970 1969 1968 1967 1966 1961 1959 1928 1923 1921 1960 1997 1994 1999 1997 1992 1991 1990 1999 1997 1994 1993 1980 1978 1974 1973 1999 1997 1994 1993 1999 1997 1992 1991 1989 1988 1999

Total nests

Active nests

21 30 40 25 25 40 28 25 25 27 23 37 45 0 20 0 0 0 13 38 0 0 6 10 29 6

21 30 40 25 25 40 28 25 25 27 23 37 38 0 20 0 0 0 13 35 0 0 5 10 19

Sample size

Successful nests

13 33

0 22

10

0

7

4

4 42

0 0

Number of chicks

51

14 30 0 0 8 7 0

0 0 7 7 0 0 0 0 4 42 0

4 42 0

6

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Moul (1998b) Moul (1994) Vennesland (2000) Moul (1998b) Moul (1992) Moul (1991) Breault (1990) Vennesland (2000) Moul (1998b) Gebauer (1995b) Gebauer (1995b) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Vennesland (2000) Moul (1998b) Moul (1994) Moul (1993) Vennesland (2000) Moul (1998b) Moul (1992) Moul (1991) Breault (1989) Breault (1988) Vennesland (2000) Continued on next page

23

Appendix 2 (cont’d) Great Blue Heron colony records for the Lower Fraser Valley, Sunshine Coast, and Powell River areas, British Columbia, 1920–1999 Colony ID code H212-006 H212-006 H212-006 H212-007 H212-007 H216-001 H216-002 H216-003 H216-003 H216-003 H216-004 H216-004 H218-001 H218-001 H218-001 H218-001 H218-001 H219-001 H219-001 H219-001 H219-001 H219-001 H219-001 H219-002 H219-002 H219-002 H219-002 H219-002

Colony name Myrtle Beach Myrtle Beach Myrtle Beach Okeover Inlet Okeover Inlet Snug Cove A Snug Cove B Anvil Island Anvil Island Anvil Island Nelson Island Nelson Island Cheam Lake Cheam Lake Cheam Lake Cheam Lake Cheam Lake Harrison River Harrison River Harrison River Harrison River Harrison River Harrison River Chehalis River Chehalis River Chehalis River Chehalis River Chehalis River

Locality

Year

Total nests

Active nests

Powell River Powell River Powell River Powell River Powell River Bowen Island Bowen Island Anvil Island Anvil Island Anvil Island Nelson Island Nelson Island Agassiz Agassiz Agassiz Agassiz Agassiz Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills Harrison Mills

1997 1994 1993 1999 1997 1999 1999 1980 1974 1972 1980 1977 1999 1997 1994 1993 1992 1999 1998 1997 1994 1993 1992 1979 1960 1959 1958 1957

0 2 6 0 0 1 2 8 1 1 1 1 15 0 10 15 13 0 20 27 40 40 63 84 1 1 1 1

0 2 6 0 0 1 2 0 1 1 0 0 15 0 10 15 13 0 15 27 40 40 63 0 1 1 1 1

Abbreviations used: CFB = Canadian Forces Base IR = Indian Reserve UBC = University of British Columbia

24

Sample size

Successful nests

1 2

0 2

20 27

0 0

63

19

Number of chicks

4

36

Source Moul (1998b) Gebauer (1995b) Gebauer (1995a) Vennesland (2000) Moul (1998b) Vennesland (2000) Vennesland (2000) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Butler (1997) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Vennesland (2000) Vennesland (2000) Moul (1998b) Gebauer (1995a) Gebauer (1995a) Gebauer (1995a) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985)

Appendix 3 Great Blue Heron colony records for the North Coast and Queen Charlotte Islands, British Columbia, 1920–1997 Colony ID code

Colony name

Locality

Year

Total nests

Active nests

H612-001 H613-001 H613-002 H613-003 H613-004 H613-005

Kunghit Island Massett Massett Inlet Yakoun River Estuary Chinkundl Creek Demon Creek

South Moresby Graham Island Graham Island Port Clements Skidegate Graham Island

1946 1920 1927 1996 1997 1997

1 1 1 2 2 3

1 1 1 2 2 3

25

Sample size

Successful nests

Number of chicks

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) A. Cober (pers. comm.) A. Hetherington (pers. comm.) A. Hetherington (pers. comm.)

Appendix 4 Great Blue Heron colony records for interior regions of British Columbia, 1920–1999 Colony ID code

Colony name

Locality

Year

Total nests


Grant Ranch Nicola River Chum Lake Chum Lake Chum Lake - east Darfield Moyie Lake Moyie Lake Moyie Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Duck Lake Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River Goat River

Lower Nicola Merrit S. Thompson R. S. Thompson R. S. Thompson R. N. Thompson R. Cranbrook Cranbrook Cranbrook Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston Creston

1999 1982 1980 1973 1980 1980 1983 1982 1981 1983 1982 1981 1980 1977 1975 1973 1972 1971 1968 1968 1966 1948 1947 1984 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968

7 1 3 1 1 11 15 11 11 66 54 70 85 93 122 114 95 90 80 80 77 40 40 33 30 23 15 15 15 15 15 15 15 15 15 15 15 15 15

Active nests

Sample size

Successful nests

Number of chicks

1 3 1 1 9 11 11 57 54 55 63 93 122 114 95 90 80

33 25 15 15 15 15 15 15 15 15 15 15 15 15 15

23

28

Source K. Shewchuk (pers. comm.) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985)

Continued on next page

26

Appendix 4 (cont’d) Great Blue Heron colony records for interior regions of British Columbia, 1920–1999 Colony ID code

Colony name

Locality

Year


Goat River Saugum Lake Salmo River Nancy Green Lake Slocan City Slocan City Slocan City Slocan City Slocan City Slocan City Slocan Pool Slocan Pool Slocan Pool Slocan Pool Fort Steele Saint Mary’s River Saint Mary’s River Saint Mary’s River Colvalli Fairmont Fairmont Fairmont Fairmont Fairmont Fairmont Fairmont Wilmer Wildlife Area Wilmer Wildlife Area Wilmer Wildlife Area Wilmer Wildlife Area Wilmer Wildlife Area Windermere Lake Windermere Lake Windermere Lake Windermere Lake Windermere Lake Windermere Lake Windermere Lake Duncan-Lardeau

Creston Kootenay Salmo Castlegar Slocan Slocan Slocan Slocan Slocan Slocan Slocan Slocan Slocan Slocan Kootenay River Fort Steele Fort Steele Fort Steele Kootenay River Columbia Lake Columbia Lake Columbia Lake Columbia Lake Columbia Lake Columbia Lake Columbia Lake Columbia River Columbia River Columbia River Columbia River Columbia River Windermere Windermere Windermere Windermere Windermere Windermere Windermere Kootenay Lake

1967 1999 1983 1999 1980 1979 1978 1977 1976 1975 1980 1979 1978 1977 1977 1982 1980 1976 1970 1982 1981 1980 1979 1973 1963 1941 1981 1980 1979 1978 1976 1981 1980 1979 1976 1973 1967 1963 1999

Total nests

Active nests

15 12 4 1 5 1 1 1 1 1 7 1 1 1 10 30 14 1 13 45 40 46 33 10 25 2

15 12 4 1 1 1 1 1 1 5 1 1 1 25 14 1 35 35

2 0 5

10 8 10 30

0 0 0

6 6 12 25 25 20

6 25

Sample size

Successful nests

Number of chicks

Source Forbes et al. (1985) G. Tipper (pers. comm.) Forbes et al. (1985) T. Antifeau (pers. comm.) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Mark (1976) B. Herbison (pers. comm.)


27


Colony name

Locality

Year


Upper Arrow Lake Upper Arrow Lake Upper Arrow Lake Golden Golden Golden Golden Golden Golden Golden Golden Golden Golden Golden Golden Parsons Parsons Parsons Parsons Brisco - north Brisco - north Brisco - north Brisco - north Brisco - north Brisco - north Brisco - south Brisco - south Brisco - south Brisco - south Little Horse Lake Little Horse Lake Little Horse Lake Little Horse Lake Muddy Lake Muddy Lake Muddy Lake Muddy Lake Muddy Lake Fox Mt. Beacon

Revelstoke Revelstoke Revelstoke Golden Golden Golden Golden Golden Golden Golden Golden Golden Golden Golden Golden Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River Columbia River 100 Mile House 100 Mile House 100 Mile House 100 Mile House 100 Mile House 100 Mile House 100 Mile House 100 Mile House 100 Mile House Williams Lake

1982 1981 1978 1982 1980 1969 1968 1967 1966 1965 1964 1963 1962 1961 1960 1982 1981 1980 1968 1982 1981 1980 1979 1978 1974 1981 1980 1979 1978 1999 1998 1997 1996 1999 1998 1997 1996 1995 1998

Total nests

Active nests

12 17 1 4 15 1 1 1 1 1 1 1 1 1 1 75 65 10 1 54 34 40 28 49 51

12

Number of chicks

14

35

10 1 40

18

47

30 30 30 30 0 30 30 30 25 1

30 30 30 25 1

Successful nests

1 4 15 1 1 1 1 1 1 1 1 1 1 60

0 0 1

1 15 30 30 30 30

Sample size

Source Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) R. Packham (pers. comm.) R. Packham (pers. comm.) R. Packham (pers. comm.) R. Packham (pers. comm.) J. Steciw (pers. comm.) R. Packham (pers. comm.) R. Packham (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.)


28


Colony name

Locality

Year


Fox Mt. Beacon Big L. - Swanson Rd. Big L. - Swanson Rd. Big L. - Swanson Rd. Big L. - Swanson Rd. Big L. - Swanson Rd. Big L. - Swanson Rd. Big L. - Swanson Rd. Exeter Lake Exeter Lake Exeter Lake Exeter Lake Hawks Creek Hawks Creek Hawks Creek Hawks Creek Hawks Creek Big Lake FSR Big Lake FSR Big Lake FSR Chimney Lake Vaseux Lake Hatfield’s Island Hatfield’s Island Hatfield’s Island Chain Lakes Island Road Kelowna Airport Mission Creek Mission Creek Mission Creek Mission Creek Mission Creek Mission Creek Mission Creek Jewel Lake Swan Lake Coldstream Creek Vernon city

Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake 100 Mile House 100 Mile House 100 Mile House 100 Mile House Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Williams Lake Vaseux Lake Vaseux Lake Vaseux Lake Vaseux Lake Summerland Oliver Kelowna Kelowna Kelowna Kelowna Kelowna Kelowna Kelowna Kelowna Greenwood Vernon Vernon Vernon

1994 1999 1998 1997 1996 1995 1994 1993 1999 1998 1997 1996 1999 1998 1997 1996 1990 1999 1998 1997 1999 1983 1988 1986 1985 1972 1992 1999 1999 1986 1985 1984 1983 1982 1981 1992 1981 1986 1999

Total nests

Active nests

1 4 4

1 4 4 0 0 1 1 1 0 30 30 30 0 7 7 1

1 1 1 30 30 30 0 7 7 1 4 0 12 1 3 5 1 2 1 1 3 6 5 3 3 3 3 3 3 3 1 1 35

0 12 1 3 1 1 1 1 6 3 3 3 3 3 3 1 1 35

Sample size

Successful nests

Number of chicks

1

4

Source J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) J. Steciw (pers. comm.) Forbes et al. (1985) O. Dyer (pers. comm.) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) O. Dyer (pers. comm.) L. Gyug (pers. comm.) T. Ether (pers. comm.) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) O. Dyer (pers. comm.) Forbes et al. (1985) Cannings et al. (1987) C. Siddle (pers. comm.)


29


Colony name

Locality

Year

Total nests

Active nests

H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H822-003 H823-001 H826-001 H826-001 H826-002 H826-002 H826-002 H826-002 H826-003 H826-003 H826-003 H826-003 H826-003 H826-003

Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Vernon city Duteau Creek Gardom Lake Gardom Lake Shuswap River Shuswap River Shuswap River Shuswap River Otter Lake Otter Lake Otter Lake Otter Lake Otter Lake Otter Lake

Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Armstrong Armstrong Enderby Enderby Enderby Enderby Armstrong Armstrong Armstrong Armstrong Armstrong Armstrong

1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1983 1946 1945 1994 1980 1979 1978 1980 1979 1977 1972 1963 1962

7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 6 2 2 20 20 7 7 26 20 25 25 24 12

7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 6

23 25

Sample size

Successful nests

Number of chicks

Source Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Cannings et al. (1987) Forbes et al. (1985) Forbes et al. (1985) O. Dyer (pers. comm.) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Forbes et al. (1985) Cannings et al. (1987) Forbes et al. (1985) Forbes et al. (1985)

Sources: Breault, A.M. 1988. Productivity at Great Blue Heron colonies in the Strait of Georgia. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 53 pp. Breault, A.M. 1989. Distribution, abundance and productivity of Great Blue Heron colonies in the Strait of Georgia. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 82 pp. Breault, A.M. 1990. Monitoring program of fish-eating birds in the Strait of Georgia. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 74 pp. Butler, R.W. 1989. Breeding ecology and population trends of the Great Blue Heron (Ardea herodias fannini) in the Strait of Georgia. Pages 112–117 in K. Vermeer and R.W. Butler (eds.), The ecology and status of marine and shoreline birds in the Strait of Georgia, British Columbia. Canadian Wildlife Service Special Publication, Ottawa, Ontario. Butler, R.W. 1997. The Great Blue Heron. University of British Columbia Press, Vancouver, B.C. 167 pp. Cannings, R.A.; Cannings, R.J.; Cannings, S.G. 1987. Birds of the Okanagan Valley, British Columbia. Royal British Columbia Museum, Victoria, B.C. 420 pp.


30

Elliott, J.E.; Butler, R.W.; Norstrom, R.J.; Whitehead, P.E. 1989. Environmental contaminants and reproductive success of great blue herons Ardea herodias in British Columbia, 1986–87. Environ. Pollut. 59:91–114. Gebauer, M.B. 1995a. Status and productivity of Great Blue Heron (Ardea herodias) colonies in the lower Fraser River valley in 1992, 1993 and 1994. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Surrey, B.C. Gebauer, M.B. 1995b. Status and productivity of Great Blue Heron (Ardea herodias) colonies in the Howe Sound/Whistler, Sunshine Coast and Powell River areas in 1993 and 1994. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Surrey, B.C. 50 pp. Mark, D.M. 1976. An inventory of Great Blue Heron (Ardea herodias) nesting colonies in British Columbia. Northwest Sci. 50:32–41. Moul, I.E. 1991. The breeding success of herons, eagles and cormorants nesting in the Strait of Georgia and Johnstone Strait. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 69 pp. Moul, I.E. 1992. The breeding success of herons, eagles and cormorants nesting near the waters surrounding Vancouver Island, 1992. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 137 pp. Moul, I.E. 1993. The breeding success of herons, eagles and cormorants nesting near the waters surrounding Vancouver Island, 1993. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 124 pp. Moul, I.E. 1994. The breeding success of herons and cormorants nesting near the Strait of Georgia, 1994. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 30 pp. Moul, I.E. 1995. Egg collections and numbers of herons and cormorants nesting near the Strait of Georgia, 1995. Unpublished contract report. Canadian Wildlife Service, Pacific and Yukon Region, Delta, B.C. 20 pp. Moul, I.E. 1998a. The location and status of heron colonies around the Strait of Georgia, Region 1, Vancouver Island. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 161 pp. Moul, I.E. 1998b. The location and status of heron colonies around the Strait of Georgia, Region 2, Lower Fraser Valley, Sunshine Coast and Powell River area. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 146 pp. Moul, I.E. 1999a. The location and status of heron colonies for the Georgia Basin area of British Columbia, Region 1, Vancouver Island 1998. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 31 pp. Moul, I.E. 1999b. The location and status of heron colonies around the Strait of Georgia, Region 2, Lower Fraser Valley, Sunshine Coast and Powell River area 1998. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Surrey, B.C. 29 pp. Moul, I.E. 2000. The location and status of heron colonies for the Georgia Basin area of British Columbia, Region 1, Vancouver Island 1999. Unpublished contract report. B.C. Ministry of Environment, Lands and Parks, Nanaimo, B.C. 53 pp Vennesland, R.G. 2000. The effects of disturbance from humans and predation on breeding decisions of Great Blue Herons. M.Sc. Thesis, Simon Fraser University, Burnaby, B.C.

31

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Advanced Calculus: Lecture Notes for Mathematics 217-317

Q-217

AFRL-PR-WP-TP-2007-217 - CiteSeerX

208-217

Jrn 217

Q-217

In progress No BCM-HGS

.217; NUS:

MATH 217

Chemistry 217

Vol. 11 No. 3 June 1996 Section 1 Page 217

progress notes - Lubbock - UMC Health System