The Sierra Nevada Yellow-legged frogs were almost wiped out of Yosemite National Park. But these scientists mounted a wildlife comeback.

Ribbit is the sound of a Pacific chorus frog (also called Pacific tree frog), and because that species is abundant ... More than 2,500 recordings from places including Yellowstone, Saguaro and Mesa ...

(CNN) – A major comeback is underway at Yosemite National Park, and it involves the Sierra Nevada yellow-legged frog. The frogs are an important part of the ecosystem at the park but are currently ...