Crayfish

Here is a crayfish, don't know what species.  Here are some links that might help figure out what species it is:

http://www.in.gov/dnr/fishwild/files/fw_Burrowing_Crayfish_of_Indiana_March_2008.pdf

http://iz.carnegiemnh.org/crayfish/country_pages/state_pages/indiana.htm