The Sierra Nevada Yellow-legged Frog (IMAGE) University of California - Santa Barbara Caption The Sierra Nevada yellow-legged frog (Rana sierrae), seen here basking at the edge of a lake, was once common in the Sierra Nevada but is now endangered. Credit Steven Sadro Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.