The mountain yellow-legged frog once thrived in the Sierra Nevada, but today there is less than 100. The yellow-legged frog is a popular topic with researchers and was once an abundant amphibian ...

The yellow-spotted tree frog is also known as the yellow-spotted bell frog, the New England swamp frog or the tablelands bell frog. It’s listed on the Red List of the International Union for ...

Back then, they were known as mountain yellow-legged frogs, though when I first saw them in an alpine meadow, taxonomy wasn’t exactly on my mind. It was the 1970s, and I was just a boy out exploring ...

The jewel-like lakes of the High Sierra in Yosemite National Park are awe-inspiring sights. But for more than a hundred years they've also been biologically disrupted, stocked each year with ...

Amphibians, like this treefrog, are among the most threatened of all animal species. They face problems of habitat loss, climate change, pollution, new diseases and illegal harvesting Disclaimer: AAAS ...