In this photo provided by the Nevada Department of Wildlife, a Dixie Valley toad sits atop grass in Dixie Valley, Nev., on April 6, 2009. The U.S. Fish and Wildlife Service temporarily listed a rare northern Nevada toad as endangered on an emergency basis partly because of threats a geothermal plant in the works poses to its habitat in the only place its known to live in the world about 100 miles east of Reno. (Matt Maples/Nevada Department of Wildlife via AP, File)