High in the mountains, a Clark's Nutcracker buries a cache of whitebark pine seeds. This will be nearly its sole source of food until the next summer. But some of those cached seeds will germinate, spawning a small grove of pines. Whitebark pines are one of more than 20 species of pines…

Why does the American Dipper dip? One possibility is that the dipper's repetitive bobbing, against a background of turbulent water, helps conceal the bird's image from predators. A second theory asserts that dipping helps the bird spot prey beneath the surface of the water. But this theory…

As the sun sets over the Connecticut River, as many as 300,000 Tree Swallows gather on the wing in one huge, tightly choreographed flock. With dusk at hand, the aerobatic flock - now shaped like a tornado - swoops down into the tall reeds. It takes but 15 seconds for the 300,000 birds to…

Some cloudless night in September, when the air is clear, you may see birds flying across the yellow face of the moon! September is peak migration time for millions of songbirds heading south from North America to more tropical latitudes. Nocturnal migrants of the same species, such as…

Bird song caught the ear of Italian composer Antonio Vivaldi. And he even named a 1729 flute concerto for a bird — the goldfinch. The source of inspiration for Vivaldi's Goldfinch concerto, or Il Gardellino, was the European Goldfinch, a tiny bird found throughout much of Europe, where it…

The voice of the Laughing Kookaburra is so distinctive, it's one of the best known sounds in nature. Its exotic call has been a Hollywood standard for decades, that unseen creature in the depths of the jungle, with heroes ranging from Tarzan to Indiana Jones. Kookaburras are hefty members…

Scientists have found that, at least for some species, a bird’s genes dictate the route it takes when it migrates. For instance, when subspecies of Swainson’s Thrushes interbreed and produce hybrid offspring, those young birds may take mom’s route north and dad’s route south or zigzag…

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…

A crow named Betty learned how to take a straight piece of wire and bend one end into a hook. She then used the hooked end to haul a tiny bucket of meat from the bottom of a long tube. A postage stamp was issued in honor of this New Caledonian Crow. Watch a video of Betty - we've provided…

Since 1929, Michigan’s state bird has been the American Robin. But lots of people think it’s time for a change. The Black-capped Chickadee is a popular favorite, as is the endangered Kirtland’s Warbler. But it turns out that it’s pretty hard to get a state bird changed.