Mountain yellow-legged frog

The Mountain yellow-legged frog is classified as Endangered (EN), considered to be facing a very high risk of extinction in the wild.

The Mountain yellow-legged frog (Rana muscosa) lives in a diverse array of water sources within the Sierra Nevada mountains of the western United States. They prefer mountain creeks and lakes, particularly sunny riverbanks, meadow streams, isolated pools and lake borders. More

mountain yellow-legged frog, a group of two closely-related species (Rana muscosa and Rana sierrae) that inhabit California's highest mountains. More

California Mountain Yellow-legged Frogs on Mt. More

Background: The mountain yellow-legged frog, Rana muscosa, is a true frog in the family Ranidae. More

Mountain Yellow-legged Frog as an Endangered Species, "The mountain yellow-legged frog in the Sierra Nevada is geographically, morphologically and genetically distinct from mountain yellow legged frogs in southern California. It is undisputedly a 'species' under the ESAOs listing criteria and warrants recognition as such. More

DESCRIPTION: The Mountain Yellow-Legged Frog is 2 to 3 1/2 inches long and has black or brown spots or vermiculations on the back. The dorsolateral ridges are present but may not be distinct. The tips of the fully webbed toes are dark. More

The mountain yellow-legged frog is a moderate-sized frog (1.5 to 3.25 inches long). Females are slightly larger than males. Males have a swollen, darkened thumb. Markings are olive, yellowish or brown above, with some dark black spots. More

Mountain yellow-legged frogs inhabit high-elevation lakes, ponds, and streams in the Sierra Nevada Mountains and Transverse Ranges of California and are on a rapid trend to extinction. More

The mountain yellow-legged frog is approximately 1.5-3.5 inches in size. The dorsum is highly variable with olive, yellowish or brown color, with variation of black or brown lichen-like markings. Undersurfaces of the legs and lower belly are yellow to pale orange. More

mountain yellow-legged frogs typically range in size from 2-3" (snout-vent length; 50-80 mm). Color patterns are highly variable across the range of the mountain yellow-legged frog. Dorsal surfaces have a light- to medium-brown background color that is heavily flecked with tan and dark-brown spots. More

The Mountain Yellow-legged Frog is one of the amphibian species that is quickly disappearing. It has already vanished from more than half of the places where it was once common. More

Mountain Yellow-Legged Frog: ESA Protection - In Brief: A couple of years ago conservationists sued to gain Endangered Species Act protection for the yellow-legged frog in the Sierra Nevada. More

the rare mountain yellow-legged frog in the San Jacinto Wilderness near Idyllwild, Calif. More

placed 24 mountain yellow-legged frogs into special refrigerators that will hopefully cause the endangered frogs to mate. (Image: Chris Brown, USGS) Rana_muscosa It's expected that the cold temperatures will put frogs in the mood. More

The mountain yellow-legged frog was once the most abundant amphibian in the Sierra Nevada Mountains. Only a few decades ago, it was difficult to walk around many of the Sierra’s alpine lakes without tripping over these diminutive “mountain gnomes. More

in the Sierra Nevada, the mountain yellow-legged frog is now critically endangered in the Range of Light. Populations of mountain yellow-legged frogs have declined dramatically and they are now found in fewer than 7 percent of their historic localities. More

Life in the Sierra Nevada for the mountain yellow-legged frog is being complicated by climate change. USGS photo. Editor's note: This is the seventh excerpt from the National Parks Conservation Association's latest report on how climate change is impacting national parks. More

and the decline of the mountain yellow-legged frog from within protected areas. Conservation Biology 14: 428-438. * Knapp, R.A., Matthews, K.R. and Sarnelle, O. 2001. Resistance and resilience of alpine lake fauna to fish introductions. More

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. More

Mountain Yellow-legged Frog Hopping for Survival = In April 2005, representatives from California Department of Fish & Game, U.S. Fish and Wildlife Service (USFWS), U.S. Forest Service, and U.S. More

The mountain yellow-legged frog was historically the most abundant frog in the Sierra Nevada, ranging from southern Plumas County to southern Tulare County, at elevations mostly above 6,000 feet. In 1959, Dr. David Wake, a herpetologist with the U.C. More

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mountain yellow-legged frog in Willow Creek, a tributary of Tahquitz Creek. The museum’s study will continue until biologists have completed three surveys at each of the 19 sites studied by the 1908 expedition. More

, all mountain yellow-legged frogs that occur north of the Tehachapi Mountains in the Sierra Nevada Listing status: Candidate * States/US Territories in which this population is known to More