You may be mountain biking on dusty trails already or checking out conditions for wind surfing, but the mountains are still locked in snow. A former winter backcountry ranger in Yosemite listens to spring's arrival at 10,000 feet. Recently proposed for endangered species listing , the Mountain Yellow-legged frog has been rapidly disappearing from high country lakes and streams.
Researchers find a culprit.
Keeping the Balance By Carol Blaney and Peggy Moore, research scientist, Yosemite National Park. Research in Yosemite helps park managers come up with a plan. Biologist Alisa Durgarian explains the unique conditions that form their incredible diversity and where to see them.