Once the most common amphibian in the high elevation portion of California’s Sierra Nevada mountains, during the past century the Sierra Nevada yellow-legged frog (Rana sierrae) has disappeared from ...

The introduction of invasive trout, combined with a lethal fungus, decimated populations of what would become the rarest ...

Two species of frog and two toads are native to the UK. So-called common frogs (Rana temporaria) and common toads (Bufo bufo) are widespread and often spotted in gardens. But sightings of these ...

After nearly disappearing for good, Sierra Nevada yellow-legged frogs are once again hopping happily around California’s alpine lakes. Scientists are celebrating the comeback of the amphibians (Rana ...

Emerging from a partially frozen pond more than 6,000 feet high in the Alps, European common frogs (Rana temporaria) set out to find mates and begin breeding activities. These frogs have adapted ...

The California red-legged frog and northern red-legged frog were once both classified as subspecies — Rana a. draytonii and Rana a. aurora, respectively — of the red-legged frog (Rana aurora). But a ...

Adult foothill yellow-legged frogs (Rana boylii) are from 1.5 to 3 inches long, with a distinctive lemon-yellow color under their legs. They inhabit partially shaded, rocky streams that flow ...