Hummingbirds are the tiniest of birds, yet they are some of the toughest creatures on the planet. Watch the full episode now.

Hummingbird mothers usually lay two tiny eggs, and the chicks hatch in a couple of weeks.

Biologist Doug Altshuler has turned his lab into a kind of hummingbird training center.

These tiny marvels dazzle and delight bird watchers all over the world, and NATURE reveals their stunning abilities as they have never been seen before.

The Cape Griffon vulture, the largest bird of its kind in Africa, is also one of the most endangered and has suffered a significant population decline over the past few decades.

See the winners of NATURE's parrot photo contest.

Nearly a third of parrots worldwide are threatened -- a statistic three times greater than the threat to all bird species.

Parrots have little trouble attracting our attention. But what traits fare best for these birds when their goal is inspiring love in potential parrot mates?

Male budgerigars use their fighting skills and shimmering feathers to vie for a female's attention.

A male palm cockatoo gets crafty in his effort to attract a mate.