Birds at a suet feeder... What a burst of vitality on a chilly morning! What's the attraction? A cake of suet, suspended from a branch in a small wire feeder. Suet is beef fat, a high-energy food critical for birds' survival in the colder months. Suet is an especially strong magnet for…

How long can a bird fly without touching the earth? To find out, Swiss scientists attached sensors to Alpine Swifts. The sensors showed long periods when the swifts were gliding and not flapping their wings. Were the birds asleep? Scientists don’t know for sure. It could be that Alpine…

Harpy Eagles spend their lives in tall, remote tropical forests in Central and South America, flying from tree to tree in search of food. The eagles are named for the Harpies of Greek mythology, women with the bodies of birds who, on Zeus’s command, snatched people from the earth. Since it…

For small songbirds, surviving a cold winter night can be challenging. Their bodies lose heat faster than those of larger birds. So little birds have found resourceful ways to stay warm — like huddling close together with other birds. But the Verdin, a tiny bird of the Southwest, does…

Kentucky Warblers nest in forested regions in much of the East, preferring woodlands with a dense understory, often near streams or other wetlands. These birds can use our help. As their forest habitat shrinks, it’s easier for Brown-headed Cowbirds to find and parasitize the warblers’…

De todos los colores atrevidos que la naturaleza ha dado a las aves, el rosa brillante podría ser el más sorprendente. Precisamente, el ave de rosa más atrevida de todas vive a lo largo del Golfo de México durante todo el año: la espátula rosada. Estas aves sobresalen, especialmente cuando…

The Greater Honeyguide's demanding call is not aimed at a member of its own species. Instead, the bird guides people in search of honey through the forest, directly to bee hives. The bird flies to a colony of bees living in a hollow tree. The human follower exposes the hive with an ax and…

A typical bird nest will have maybe four to six eggs neatly arranged by the parent to hunker down on. But in one Rhea nest, you may find between 50 and 80 eggs! And they’re not all from the same set of parents. Male Rheas mate with several females and then build a single nest on the ground…

Webbed feet are ideal for birds that swim, on the water’s surface or under. In fact, they’re such a nifty adaptation that they evolved, independently, in several bird groups. Ducks and geese, gulls, cormorants, loons, pelicans, penguins, puffins and boobies all have webbed feet.

Hidden below the outer breast feathers of herons, pigeons, doves, tinamous, bustards and some parrots are patches of special down feathers. These feathers are never molted, and they grow continuously. The tips break down into a dust the consistency of talcum powder. Using a fringed claw on…