"Plop…plop…splash!" Have you ever heard this sound--a frog hopping in or out of water--or seen a frog or tadpole? Imagine not hearing this sound...wouldn't that be strange?
Animals need a "helping hand" once-in-a-while for survival. For example, mountain yellow-legged frogs (Rana muscosa and Rana sierrae) are amphibians that inhabit naturally fishless lakes, ponds, and streams in the high country of the Sierra Nevada mountains. Once the most numerous amphibians in the Sierra Nevada, today mountain yellow-legged frogs have disappeared from 92% of their historic range. View map of former fishless areas in Sequoia and Kings Canyon National Parks. As a result, in 2012 Rana muscosa was listed as endangered and Rana sierrae was listed as threatened under the California Endangered Species Act; and in 2014 both species were listed as endangered under the federal Endangered Species Act.