Tuesday Crustie: Philosopher or devil?

This burrowing crayfish, Cambarus diogenes, shares a name with a Greek philospher – although admittedly one with a sour outlook. But it is often called the devil crayfish. I am presuming that the burrows it digs remind people of the traditional location of the underworld.

Photo by Mean and Pinchy on Flickr; used under a Creative Commons license.