virile crayfish

virile crayfish (Faxonius virilis)
Photo © Chris Taylor, Illinois Natural History Survey

FEATURES
This crayfish is the most common crayfish in Illinois. The virile crayfish has large claws with numerous bumps on them. The back is light brown to dark green-brown.

BEHAVIORS
The virile crayfish lives in rocky creeks and rivers and lake margins. Burrows of this crayfish may be found along a streambank, but it more frequently hides and overwinters under rocks. The virile crayfish usually reaches maturity in its third year. About 450 eggs are laid in the period March through July. This crayfish eats both dead and living plants and animals.

​Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Family: Cambaridae