Few backyard birds are as beloved as the Black-capped Chickadee. The boldly patterned chickadee is perky, trusting – and it seems to introduce itself by calling its name – chick-a-dee. But when a chickadee voices its namesake call – using a host of variations – it’s most likely maintaining…

The Blakiston's Fish-Owl is the largest owl in the world. Compared with North America’s largest familiar owl, the Great Horned, the Blakiston's is six inches taller and nearly three times as heavy. No other owl approaches its prodigious girth. But the Blakiston's Fish-Owl is endangered. It…

Gray-breasted Wood-Wrens sing a duet. Each sings a different phrase, yet the phrases are so closely linked, it sounds like one song. Such singing is called antiphonal song. The pairs use song to stake out and hold breeding territories. Dueting is most typical of birds that live in dense…

Every March sees the annual spring migration of Tree Swallows. Most of these swallows spend the winter along the Caribbean, in Central America, and in the warmest parts of South Texas and California. Some will nest as far north as northern Alaska and Canada. Tree Swallows nest only in…

Hummingbirds' names evoke their exquisite qualities and variety, from sabrewings to woodstars to sunangels-to this Violet Sabre-wing. Central and South America are home to well over 300 species of hummingbirds! Find out more about hummingbird migration -- and what hummingbirds might be…

All winter long, our neighborhood House Finches--like this one--have called to one another with their distinctive, sweet cheeps. And our resident Song Sparrows, with calls that sound like a tiny barking dog. But as the days grow longer in late winter, the lengthening light helps trigger a…

What bird laid the largest eggs ever known? To date, the record holder is the now-extinct Elephant Bird, a relative of the present-day Ostrich and other large, flightless birds, including rheas, cassowaries, and kiwis. Elephant Birds lived on the island of Madagascar. But by perhaps 1000…

On a snow-covered field in northern Japan, two majestic Red-crowned Cranes face one another, raise their heads toward the sky, and call in unison. As they call, the pair begins to dance. They bow to one another, then throw their heads over their backs, then bow again. The pair leaps into…

Looking for a project this winter? Consider giving screech-owls a helping hand. Eastern and Western Screech-Owls span the wooded areas of the continent, nesting in tree cavities left vacant by large woodpeckers. However, such natural housing opportunities are often in short supply. That’s…

Have you ever seen a bird foraging in the rain and wondered why it isn't soaked to the bone? While every bird wears one feather coat, different kinds of feathers – and even different parts of the same feather – can perform various functions. The outermost tips of the main body feathers…