Native SpeciesCrayfish, unidentified

Decapoda (order)
FOUND by MrsPovak
ID Confirmed
Quality checked by MrsPovak
Peer reviewed by Green Group
Field Notes
It was a beautiful sunny day in Dover-Foxcroft so our class walked the school's nature trail until we came to a stream. We followed the stream a bit until we found a good site to do our sampling for the day. At the stream the bank was muddy with lots of clay and we saw a deer track. We also used our nets and caught a few crayfish and a few bugs. We did not have time to identify the bugs but we did make an observation and take pictures of the crayfish before it was time to head back.
Supporting Evidence
Photo of my evidence.
This crayfish has pleopods visible where the body meets the tail. We used our pencil to make them more visible.
Photo of my evidence.
Our crayfish had a hard shell and was not molting, it measured about 4 1/2 centimeters and was missing one large claw.
Photo of my evidence.
Looking at the crayfish from the side we noticed small spines around the eyes and below the eyes. Our crayfish had a dark brown colored exoskeleton on top and a lighter brown on the bottom. The crayfish had red tips on the end of the one intact claw. We think this may be a spinycheek crayfish which is native to Maine.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Decapoda (order)
Common name:
Crayfish, unidentified
Count of individuals: 
How big is it?: 
2 - 5 cm
Is it male or female?: 
Can't tell
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 45.192676 °
W -69.230861 °
Observation Site Information
A photo of our study site.
Freshwater - In a stream or river
Trip Information
Site 1
Trip date: 
Tue, 2013-05-07 10:15
Town or city: 
Type of investigation: 
Species and Habitat Survey
MIDAS Code: 
Habitat Observations
Species diversity: 
40 different species
Evidence of vectors: 
Walking trail
A lot of trash like tires in the immediate area
Water temperature: 
Dissolved oxygen: 


Great photos of the male's gonopods - this is a Form II male O. limosus - spiny cheek. There should be spines on the "cheek". Great work!

All of the photos were great. I liked the rulers in the photos and how you made the pleopods more visible. I also like the photo of the river bank. Although a bit more details about where you were (forests etc) the weather, temperature, etc. Otherwise I really liked this article. Keep posting!