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California red-legged frog Rana luteiventris: Columbia spotted frog * Rana muscosa: Southern mountain yellow-legged frog Rana pretiosa: Oregon spotted frog * Rana sierrae: Sierra Nevada yellow-legged frog
The Sierra Nevada Yellow-legged frogs were almost wiped out of Yosemite National Park. But these scientists mounted a wildlife comeback.
They were abundant from the mid-1800s to the early 1900s, however, due to hunting and habitat encroachment by humans, they were considered extinct in the state by the 1920s.
This is a list of amphibians found in the United States. A total of 306 amphibian species have been recorded in the United States , [ 1 ] 2 of which are now extinct. [ 2 ] This list is derived from the database listing of Amphibian Species of the World .
The following is a list of megafauna discovered by science since the beginning of the 19th century (with their respective date of discovery). Some of these may have been known to native peoples or reported anecdotally but had not been generally acknowledged as confirmed by the scientific world, until conclusive evidence was obtained for formal studies.
The world’s frogs, salamanders, newts and other amphibians remain in serious trouble. A new global assessment has found that 41% of amphibian species that scientists have studied are threatened ...
"Complete List of Amphibian, Reptile, Bird and Mammal Species in California" (PDF). Archived from the original (PDF) on 2010-11-06 This is the primary source for most species on this list. California Department of Fish and Game. "Mammal Species of Special Concern"
These amphibians are illegal to own in some US states, including California, Maine, New Jersey, and Washington D.C, for one main reason: the threat they pose to the already struggling native ...