Native SpeciesVirile crayfish

Orconectes virilis
FOUND by bartonii1
2015-10-05
Oakland, Maine
ID Confirmed
Quality checked by Sina C.
Peer reviewed by Mrs R.
Field Notes
We are happy because our trap successfully landed in the water. We are also happy because we caught crayfish. Lastly we are happy because we get to be outside instead of being in a stuffy classroom We see a pond, dew on the grass, bus garage,trees, wood chip boiler, rocks lining the upper side of the pond. We hear trucks backing up. other people talking, and cricket chirps.We are very surprised that we found a purple mouth guard in our pond. Also we are surprised that there is not a lot of living organisms. We also were surprised we didn't see any frogs cause normally we see a whole bunch of frogs. The first problem we ran into was our camera wouldn't take pictures. The second and last problem was our rope wasn't long enough
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
We found a native species of crayfish called Orconectes Virilis at our school. In the first place, the pleopods are white in color. Also, the pleopods are curved, and they almost look like tweezers, or a pair of tiny claws that aren’t sharp. In comparison to that, the pleopods are slightly curved in towards the crayfish body. With those things in mind, the crayfish in the photo couldn’t be the calico, because the calico’s pleopods are much more curved and spaced out than the crayfish’s pleopods in the photo. After summing up all these facts about the features, we found a Orconectes Virilis crayfish.
Photo of my evidence.
The native crayfish species we found in the pond behind our school is called Orconectes Virilis. The color of the claws is a nondescript brown color with orange spots. Also on the outer edge of the claws is a tangerine color but the claws aren't reddish color like calico. The claw shape is straight at the base where the two parts meet. But there is no curve at the base where the two parts meet like the calico. Where the two parts meet is smooth. But on the claw there are no bumps where the two parts meet like the calico. Based on these traits, we found a Orconectes Virilis.
Photo of my evidence.
The Areola of the crayfish helped us conclude what species we caught in our pond. We found that the Areola of the crayfish started out wide and towards the middle thinned out then went back out towards the sides of the shell. The Areola of our crayfish was different from the rusty crayfish because on the rusty crayfish the areolas starts towards the middle and thins out just a tad then widens back out as they went down towards the bottom of the shell. The species that we found has a brownish green shell unlike the rusty crayfish which has a rusty color like an rustic color but also has a hint of green. From this evidence we found that the species that we caught was the Orconectes Virilis otherwise known as the Northern Crayfish.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Orconectes virilis
Common name:
Virile crayfish
Count of individuals: 
10-20
Coverage: 
Reproduction: 
How big is it?: 
Greater than 10 cm
Is it male or female?: 
Male
Sampling method: 
Trap
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 44.552970 °
Longitude: 
W -69.714540 °
Observation Site Information
A photo of our study site.
Habitat: 
Freshwater - In a pond or lake
Trip Information
Name:
MMS Pond
Trip date: 
Mon, 2015-10-05 09:41
Town or city: 
Oakland, Maine
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Freshwater
Watershed: 
Lower Kennebec
MIDAS Code: 
Habitat Observations
Species diversity: 
6 different species
Evidence of vectors: 
Walking trail
Water temperature: 
15.2°C
pH: 
7.7
Dissolved oxygen: 
4.0mg/L
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