found in *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 leniusculus Orconectes rusticus

J e f f 3. A 3. d a m s

1. 2. Example color variations 1.& 2. Photo by Matt Sell Larger photo by Melody Hirth 3 smaller photos by Bill Gerth Identified by: Identified by: Large reddish-brown (rusty) spots on sides Claws are smooth; lack bumps of body plates White “signal” spot on claw pivot Claws have bumps Wide body plate on the back Thin body plate on the back Invasive from Louisiana Invasive from the Great Plains Red Swamp Crayfish Ringed Crayfish Orconectes neglectus 1. 2. 1. 3.

2.

Photo by Brome McCreary Photo by Jeff Adams

Identified by: Identified by: Large bumps located on body plates Claws have orange tips and black bands and claws Thin body plate on the back Lacks the body plate located on the Dark markings on sides of tail back completely In Oregon, call 1-866-INVADER or go to OregonInvasivesHotline.org In other states, contact the National 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