High Quality Content by WIKIPEDIA articles! The Vegas Valley Leopard frog (Rana fisheri) is an extinct[1] frog species. Once it occurred in the Las Vegas Valley, as well as Tule Springs, Clark County, southern Nevada, United States of America, at elevations between 370 and 760 m. Vanderhorst collected ten specimens of this species at Tule Springs on 13 January 1942. These frogs were the last recorded specimens of the Vegas Valley leopard frog, and are now in the University of Michigan Museum of Comparative Zoology collection. The Vegas Valley leopard frog is now believed to be extinct. Extensive searches have failed to locate this species.