Learn what a Calliope hummingbird looks like, where to find these tiny birds in the U.S., and how to attract them.

In pursuit of the world’s smallest bird, we’ve come to the backyard of a flamingo pink house in Palpite, Cuba. Ornithologist Christopher Clark has a car full of gear to unload: cameras ...

Hummingbirds use torpor to survive long migrations when food is scarce. Researchers found that they regulate fat reserves ...

The bee hummingbird is the world's smallest bird. It is about 2.25 inches long and weighs less than 2 grams, which is about the same as a cashew nut ...

Weebill, with short, stubby, and pale beak, is one of world's smallest birds. It can grow up to 8-9 cm long and weighs around 6 grams ...

The largest is the nine-foot-tall ostrich. The smallest is the two-inch-long bee hummingbird. Everything about the anatomy of a bird reflects its ability to fly. The wings, for example ...