Darwin's Amazing Animals

In Part 3 of our series, we document all the drama involved as three young male lions make their way into the outside world. New relationships, painful separations and nasty altercations await them.

Man's impact on nature's delicate balance has had disturbing results. But the effect on predator and prey in an ancient forest in Scotland has revealed an unexpected twist, to the benefit of both.

Don't let the charming appearance and birdsong of the bull-headed shrike fool you. This cold-blooded killer will impale prey on any sharp object for a much later meal. And it's often done out of love!

An unlikely duel is about to take place with the "ocean's gangster" taking on a creature packing a most lethal punch. This bout, however, features fish out of water ... and their fight to the finish!

Tokyo's Tama River is the site of an exciting quest to film the parenting behaviors of the ever-elusive Japanese weasel. Imagine our surprise at finding a mother raising pups right under our noses!

For Kajika frogs, romance is "ribbeting." Melodies reach ultrasonic frequencies. Battles feature headlocks and chokeholds. The tightest embrace allows pairs to squeeze into tight crevices to spawn.

Kir's life reads like a novel: low-ranking male macaque shunned by the ladies and bullied by those around him gets a new chance in a neighboring troop. Does a reversal of fortune lie on the horizon?

A wild creature may very well have made your home its home: the Japanese gecko. With plenty of nighttime prey, they meander through a miniature world we're now getting a better grip in understanding.

With their bulging eyes and huge mouth, Potoos are distinctive residents of Brazil's forests. They resemble stuffed animals more than real birds, and their funny-looking faces are attracting a lot of fans online. The camera crew gets up close to capture these birds for the first time as they display an astonishing array of facial expressions or camouflage themselves against a branch. And you'll witness how Potoos react when confronted by a predator. Discover the true nature of this remarkable bird that's creating quite a buzz.

Drama unfolds just off the Japanese coast when male Asian sheephead wrasse battle for supremacy. Sporting huge forehead humps and massive jaws, they meet mouth to mouth ... and not out of affection!

How does a 5-meter-tall creature survive in one of Africa's most desolate regions? The desert-dwelling giraffe must stick its neck out for both the sparse vegetation and to avoid ever-present dangers.