Mudbugs (aka crayfish, crawdads, dinner) inhabit many of the lakes and reservoirs in sw Colorado. For some odd reason, they tend to grow to incredible sizes, even with the short growing season. I found these two carcasses on the shore of Totten Reservoir, just outside of Cortez.
I suspect a raccoon had dined on the easy pickings, and left the rest. When they get this big, most fish won’t mess with them, since they are hard to kill, and have lot’s of non-nutritious shell. They do, however, like chicken gizzards, and once purged, make for some fine eating!