A growing number of invasive Burmese pythons have taken up residence in the wetlands of Florida.

Conservationist Rom Whitaker searches for the last of the supersize crocodiles among the titans of the croc world: Nile crocodiles, saltwater crocodiles, and gharials.

Death Valley may seem an unlikely habitat for a fish, but the Devil's Hole pupfish has managed to thrive here for thousands of years.

NATURE takes viewers into the simmering cauldron of one of the world's most extreme environments -- the hottest, driest place in North America.

Discover the epic history of the Druids, one of more than a dozen gray wolf packs now occupying the 2.2 million acres of Yellowstone National Park.

The red knot makes one of the longest migrations of any animal. To accomplish this feat, it relies on the eggs of the horseshoe crab. Without these eggs, the red knot is in danger.

In the winter of 2006, millions of bees vanished from their hives without a trace. The epidemic set researchers scrambling to discover why honeybees were dying in record numbers -- and to stop the epidemic in its tracks before it spread further.

Following their protection as an endangered species, bald eagles have come roaring back.

Steller's sea lions are rapidly disappearing from Alaska's waters, and no one knows why. A broad combination of factors could be responsible.