Crayfish found in Oregon
*Note: Colors vary for all crayfish and one should look for the key characteristics associated with the arrows
Native to Pacific Northwest
Invasive from Ohio and Kentucky
Signal Crayfish
Rusty Crayfish
Pacifastacus leniusculus
Orconectes rusticus
J
e
f
f
3.
3.
A
d
a
m
s
Example color variations
1.& 2.
Larger photo by Melody Hirth
3 smaller photos by Bill Gerth
Identified by:
Claws are smooth; lack bumps
White “signal” spot on claw pivot
Wide body plate on the back
Invasive from Louisiana
2.
1.
Photo by Matt Sell
Identified by:
Large reddish-brown (rusty) spots on sides
of body plates
Claws have bumps
Thin body plate on the back
Invasive from the Great Plains
Red Swamp Crayfish
Ringed Crayfish
Procambarus clarkii
Orconectes neglectus
1.
1.
2.
3.
2.
Photo by Jeff Adams
Identified by:
Large bumps located on body plates
and claws
Lacks the body plate located on the
back completely
Photo by Brome McCreary
Identified by:
Claws have orange tips and black bands
Thin body plate on the back
Dark markings on sides of tail
In Oregon, call 1-866-INVADER or go to OregonInvasivesHotline.org
In other states, contact the National Invasive Species Hotline: 1-877-STOP-ANS
© 2011 Oregon State University. All images © Oregon Sea Grant unless otherwise indicated. This report was prepared by Oregon Sea Grant under award number NA10OAR4170059(project number A/ESG-07) from the National Oceanic and Atmospheric Administration’s National Sea
Grant College Program, U.S. Department of Commerce, and by appropriations made by the Oregon State Legislature. The statements, findings, conclusions, and recommendations are those of the authors and do not necessarily reflect the views of these funders. ORESU-E-11-013