Conservation teams have released approximately 3,000 mountain yellow-legged frogs and tadpoles into Southern California mountain ranges this year, marking another significant step in efforts to restore an amphibian species that has suffered catastrophic population losses.
San Diego Zoo Wildlife Alliance has spearheaded the breeding and reintroduction initiative, which has focused on returning the endangered species to the San Bernardino and San Jacinto mountains. Among the release locations this year was Bluff Lake near Big Bear, where conservationists observed the amphibians entering the water and beginning their lives in the wild.
The mountain yellow-legged frog once thrived throughout Southern California's high-elevation regions. Today, the species has experienced a population collapse exceeding 98 percent, driven by multiple threats including disease, non-native predators, wildfire, and drought conditions.
The breeding program operates at the Beckman Center for Conservation Research, a facility run by San Diego Zoo Wildlife Alliance. The initiative began in 2006 as a rescue operation and has evolved into a comprehensive conservation effort spanning 20 years. The program now encompasses breeding protocols, genetic diversity management, disease prevention, reproductive research, and habitat restoration.
San Diego Zoo Wildlife Alliance collaborates with federal and state agencies on the recovery effort. Partners include the US Fish and Wildlife Service, the US Geological Survey, and the California Department of Fish and Wildlife.
Since the program's inception, more than 10,000 frogs and tadpoles have been reintroduced to mountain habitats at high elevations. Conservation teams continue monitoring the reintroduced populations to assess survival rates, health indicators, and reproductive success in their native environments.
The ongoing restoration work represents a critical intervention for a species that faced potential extinction. The collaborative approach combines captive breeding expertise with field research and habitat management to give the mountain yellow-legged frog a chance at recovery in Southern California's wilderness areas.