A chipmunk gathers nuts for the winter, amassing about 6,000 of them by end of fall. But he needs to keep an eye out for pickpockets...

A team of Harris hawks work together to chase down a cottontail rabbit in the Sonoran Desert, weaving in and out of cacti as they home in on their prey.

In Mexico's Gran Desierto de Altar desert, a fringe-toed lizard outruns a sidewinder rattlesnake.

This one-pound bunny, called a pygmy rabbit, gets into a high-speed chase with a long-tailed weasel.

An old bighorn sheep and a young contender collide head-on in a fight for mating rights. Their thick, shock-absorbing skulls can withstand 800 pounds of force.

An acorn woodpecker guards its carefully stashed nuts from a very hungry and persistent squirrel.

A baby mountain goat gets separated from its mother and must battle the raging rapids to be reunited.

For the male jumping spider, flirting with a female is a dangerous game. If he fails, she'll stab him and slurp out his insides; if he succeeds, she'll be mesmerized.

In the wintry foothills of North America, a baby black bear's life begins. He must "learn the ropes" from mom in order to survive.

Olive Ridley sea turtle hatchlings run the gauntlet in Costa Rica. Only 5 out of 100 will make it through their first 8 hours out of the nest.

Go behind the scenes of the alligator sequences with North America Cinematographer Sophie Darlington and Assistant Producer Ben Wallis.

Go behind the scenes of the fighting mustangs sequence with North America cinematographer Sophie Darlington.

The adorable collared pika is as cute and cuddly as they come, that is unless you're a bird that's blown off course in the Alaskan wilderness...

In this deleted scene from North America, starving bison struggle to survive when winter sets in, and a bison calf succumbs to the elements.

In this deleted scene from North America, gray wolves hunt caribou in Labrador, Canada. Their hungry pups are counting on them to make a successful kill.

The amazing sights and sounds of North America's savage coasts come to life in our split-second highlights real.

In the wintry foothills of North America, a baby black bear's life begins. He must "learn the ropes" from mom in order to survive.

Sights from the Great Smoky Mountains.

Sights from Knight Inlet in British Columbia.

Watch a special sneak peek of the epic seven-part series North America. Discovery.com/NorthAmerica

Sights from the Sierra Nevada Mountains.

Sights from Badlands National Park.

Olive Ridley sea turtle hatchlings run the gauntlet in Costa Rica. Only 5 out of 100 will make it through their first 8 hours out of the nest.

Sights from Cape Cod National Seashore.

Go behind the scenes of the fighting mustangs sequence with North America cinematographer Sophie Darlington.

Sights from the Grand Canyon.

Untamed wilderness is just beyond our own backyards. North America, the next groundbreaking natural history series from Discovery Channel. Discovery.com/NorthAmerica

A baby mountain goat gets separated from its mother and must battle the raging rapids to be reunited.

Sights from Glacier National Park.

Sights from Churchill.

Sights from the Outer Banks.

In this deleted scene from North America, gray wolves hunt caribou in Labrador, Canada. Their hungry pups are counting on them to make a successful kill.