Conservationists have released 3,000 endangered mountain yellow-legged frogs into wetlands in California’s Sierra Nevada. The San Diego Zoo Wildlife Alliance has been working to captive breed and reintroduce mountain yellow-legged frogs (Rana muscosa) and tadpoles for two decades in partnership with the U.S. Geological Survey, the U.S. Fish and Wildlife Service (USWFS) and the California Department of Fish and Wildlife. Considered endangered by the USFWS, only 200 individuals were estimated to live in the wild before this release. The species’ main threats include disease, wildfires, drought and invasive species.
