Most birds possess the ability to see color. But birds can also see in the ultraviolet spectrum. Hummingbirds - like this Violet-crowned Hummingbird - may zero in on certain flowers because their petals strongly reflect in the ultraviolet range. Migrating birds may use ultraviolet light to…

A hawk dives into your yard, and a frightened robin slams against a window, mistaking the transparent rectangle for an escape route. But you can help. Fold its wings gently over its body in their natural position, grasp the bird lightly, and wrap it loosely several times in the towel. Keep…

From its lofty outlook, this Red-tailed Hawk commands "a bird's eye view." The Oxford English Dictionary defines that as "a view of a landscape from above, such as is presented to the eye of a bird." Debate continues about birds' visual acuity, but we do know that visual acuity is keenest…

Fossils discovered in China reveal the largest feathered animal yet known. Gigantoraptor was a very birdlike dinosaur, yet tall enough to look a Tyrannosaurus rex in the eye. Feathered but flightless, it strode the earth on long legs that likely made it a very fast runner. This…

Imagine the nesting cliff of Common Murres, 100 feet above the ocean. Suddenly, a small murre chick, only three weeks old and just one-quarter the weight of an adult, lunges off the cliff, gliding clumsily to the water below. Soon other chicks follow, splashing into the sea. The chicks'…

A young bird's nest is its first home. But most birds don't live in a nest year round, even at night. By August, many birds have left the nest behind. So, after they spend the day flying and foraging, where do they go at night? What most birds do at night is roost: they find a safe place…

Writer Ivan Doig wrote about bird songs, including that of this Western Meadowlark, in his book, Ride with Me, Mariah Montana: "Warbles and trills and solo after solo ... the air was magically busy. None of us spoke while the songs of the birds poured undiluted. I suppose we were afraid…

In the early 1980s, the city of Austin, Texas needed to enlarge its Congress Avenue Bridge. The new bridge design included expansion joints that inadvertently created roosting cavities for bats - tiny Mexican Free-tailed Bats - eventually one and one-half million of them! At first, many…

Brown-headed Cowbirds lay their eggs in other birds' nests. And these birds raise the cowbird chicks - often at the expense of their own young. This beautiful Yellow Warbler is a frequent target of the cowbird's unwelcome eggs. But it has developed a way to reject the role of foster parent…

Williamson's Sapsuckers nest in western mountain forests. The radically different plumages of the male and female so confounded 19th-century naturalists that, for nearly a decade, the birds were thought to be of different species. Sapsuckers are unique among woodpeckers in drilling neat…