Experts agree: Mark Twain's favorite amphibian, “The Celebrated Jumping Frog of Calaveras County,” is none other than the California red-legged frog. Once so common it was a staple cuisine, California ...

After nearly disappearing for good, Sierra Nevada yellow-legged frogs are once again hopping happily around California’s alpine ... greenish-brown to gray to red. They don’t have vocal sacks ...

The conservationists claim the tree harvesting plan will threaten four endangered species --- California red-legged frogs, northern spotted owls, Central California Coast Coho salmon and Northern ...