Cheers went up in March when the U.S. Fish and Wildlife Service announced plans to secure critical habitat for the threatened Chiricahua leopard frog. But there are a few groans, too, most notably ...

Crayfish frog, Lithobates areolatus, a large frog of the central and southern United States, that spends most of its life in the burrows of large crayfishes.© Mike Redmer/Shutterstock.com Crawfish ...