As singers go, American Robins are exceptional. They’re often the first birds to sing in the morning, and the last you’ll hear in the evening. While their average song strings fewer than a dozen short phrases together and lasts only a few seconds, robins sometimes sing for minutes without…

Evolution on islands can produce unusually large species. Haast’s Eagle lived on the islands now known as New Zealand. With a wingspan of 9 feet and weighing up to 30 pounds, the eagle hunted the moa — a flightless bird that stood over ten feet tall. The eagles probably vanished not long…

Brown Pelicans are a regular sight today along the Gulf of Mexico and our southern coastlines. But these birds have not always been so plentiful. They were hunted for their feathers and as pests by fishermen. The Migratory Bird Act of 1918 protected their recovery. But by 1970, pesticides…

In summer, the forests of the eastern United States are home to a bounty of birds, including this gorgeous Scarlet Tanager, which spends most of the year in tropical South America. The male’s body is a dazzling red, in contrast to his black wings and tail. It seems that these boldly…

Las aves han desarrollado diversas estrategias para proteger a sus crías. Pero solo hay una especie que puede meter a sus polluelos en un bolsillo debajo de sus alas y llevarlos hasta un lugar seguro. Es el Avesol de Centro y Sudamérica. Cuando los pequeños eclosionan, desnudos y frágiles…

A male American Golden-Plover proclaims its nesting territory with an aerial display known as the "butterfly flight." After flying up 50 feet, the plover switches to slow motion, raising its wings languidly until the wingtips nearly touch over its body, then lowering them gradually until…

The Northern Hawk Owl is one of the least studied and least known of all birds in North America. Northern Hawk Owls are owls, but they share several traits with hawks and falcons: A streamlined body shape, daytime hunting habits, and stiff wing feathers for daytime hunting. (Owls that hunt…

After a Northern Flicker carves out a nest cavity, chances are the birds will use the cavity for just one nesting season. But the cavity may have a prolonged career as a home for small owls, bluebirds, swallows, and other birds – including the Bufflehead. Buffleheads, like the family seen…

Some gulls and terns may show a glowing pink color, similar to that of flamingos and spoonbills. This pink color comes from pigments in the birds' food called carotenoids. These gulls and terns are able to convert these naturally occurring pigments to hues that may enhance their success at…

Resident Cooper’s Hawks that nest in the urban areas of Albuquerque, New Mexico, are thriving as the populations of doves, their prey, have exploded. The easy prey gives the urban birds a competitive advantage over hawks in more natural habitats, where prey is less concentrated. The…