© Adam Backlin, U.S. Geological SurveyUSGS scientists found this adult mountain yellow-legged frog on June 10 in Tahquitz Creek, a rediscovered population of the endangered frog in the San Jacinto Wilderness, San Bernardino National Forest, California.
For the first time in nearly 50 years, a population of a nearly extinct frog has been rediscovered in the San Bernardino National Forest's San Jacinto Wilderness. Biologists from the U.S. Geological Survey (USGS) assessing suitability of sites to re-establish frogs and scientists from the San Diego Natural History Museum retracing a 1908 natural history expedition both rediscovered the rare mountain yellow-legged frog in the San Jacinto Wilderness near Idyllwild, Calif.
This re-discovery - along with the San Diego Zoo's first successful breeding of the frog in captivity, and successful efforts by California Department of Fish and Game to restore frog habitat - renews hope of survival for this Southern California amphibian.
Globally, amphibians are on the decline because of habitat loss, effects of climate change and the spread of a deadly pathogen called the chytrid fungus. The mountain yellow-legged frog is one of three frogs or toads on the federal Endangered Species List in Southern California. Prior to this recent discovery, USGS researchers had estimated there were about 122 adult mountain yellow-legged frogs in the wild.