. Horizontal ... Very broad claws with two widely spaced nodules on ... sp
Identification tips for the native White-clawed crayfish and some non-native crayfish species
White-clawed crayfish
1
Photo credits: 1. 2. 3. 4. 5. 6. 7.
(Body colour can be very variable)
Normally a brown to olive colour, can be bluish.
Signal crayfish
2
3
Red or maroon body. Large red tubercles (nodules) and spines on claws give knobbly appearance
White or turquoise patch at junction of ‘fingers’
Spiny-cheek crayfish
Red swamp crayfish
5
Marbled crayfish
D. Gerke Trevor Renals I. Duloup_CC-BY-SA-3.0 www.uni-kiel.de/zoologie/limnologie/ Casey D. Swecker Crown Copyright 2009 www.rakipolskie.pl Noble crayfish
4
Very broad claws with two widely spaced nodules on inner side of fixed finger
6
Turkish crayfish 7
Fingers long, straight and narrow Horizontal brown stripe on each abdominal segment
Body bluish tinged to brightly blue with a marbled pattern.
Report sightings: http://records.biodiversityireland.ie/record/invasives or by E-mail:
[email protected]
Identification tips on the claws of the native White-clawed crayfish and some non-native crayfish species
White-clawed crayfish 1
Photo credits:
(Underside of claws shown in the photos)
Whitish underside of claws, NEVER red
Signal crayfish
Turkish crayfish
2
Noble crayfish
Red swamp crayfish
NPWS Manual No. 45 GBNNSS Crown Copyright 2009 Trevor Renals Copyright Jens Keicher Crown Copyright 2009 (c) Rian Vestors Natuurfotografie © Michal Maňas. BioLib.cz Marbled crayfish
Spiny-cheek crayfish
3
Underside tip of claws are orange with a black band below
Fingers of claws are long, straight and narrow
Underside of claws are red
1. 2. 3. 4. 5. 6. 7.
4
5
Blue with marbled pattern
7
6
Knobbly claws with red tubercles
Claws very broad, reddish-brown underneath and with widely spaced nodules on the inner side of the fixed finger
Report sightings: http://records.biodiversityireland.ie/record/invasives or by E-mail:
[email protected]