Butterflies have a remarkable method for mating. See how these incredible insects reproduce. You don't have to go far to see butterflies; you just need to look . - [Narrator] If caterpillars were made ...

A mother mountain lion risks her life to feed her six kittens. This rare footage captures her incredible fight against the odds with a large elk in the snowy wilderness of Montana.

Mountain lions risk everything to hunt elk, prey more than twice their size. After ten years of monitoring mountain lions in Montana, this crew has captured this behavior on camera only four times.

This orphaned baby walrus, dubbed Little Miss Walrus, was found alone on a remote Alaskan beach, just one week old and covered in scratches. She’s now safe at the Alaska SeaLife Center, the only place ...

The Arctic “death spiral” refers to the rapid loss of sea ice caused by climate change. For walruses, this means losing the ice platforms they rely on to rest, raise their young, and hunt. Discover ...

It was once believed that walruses dug for clams with their tusks—but the truth is even stranger. They actually use their powerful tongues, like a piston, to suck clams right out of their shells.

NATURE presents the compelling story of a remarkable denizen of the West in Cloud: Wild Stallion of the Rockies. America’s wild horses lead an exhilarating but perilous existence. The climate can be ...

Marine ecologist Alannah Vellacott grew up in a Bahamian subsistence fishing community, where wrestling sharks before sunrise was part of daily life. Now she’s dedicated to conserving these majestic ...

Tiger sharks are one of the largest shark species. On average, they measure 10 to 14 feet and weigh 850 to 1,400 pounds. But they can be as long as 20 to 25 feet and weigh more than 1,900 pounds.

Adult males measure 15.7 to 24.8 inches long from the tip of their bill to the tip of their tail and weigh 1.7 to 6.6 pounds. Females are smaller than males, measuring 14.5 to 21.6 inches in length ...

In a city that loves celebrities, one mountain lion became the mascot for conservation efforts that eventually led to the creation of California’s first wildlife corridor. But one wildlife corridor, ...

Clouded leopards are larger than small cats and smaller than big cats. Males are twice the size of females, with females weighing 22 to 30 pounds and males weighing 44 to 55 pounds. They measure 26 to ...