In a new paper, researchers recorded bears in Alaska increasingly turning to eider and guillemot eggs and chicks as sea ice ...

A small, graceful marsh tern, black and silver in breeding plumage. In its choice of surroundings, the Black Tern leads a double life: in North America in summer it is a typical bird of freshwater ...

This strikingly patterned southwestern hawk is more sociable than most birds of prey. The Harris's Hawk is often seen in groups of three or more, the birds perching close together on poles or giant ...

Related to the typical falcons, but very different in shape and habits. The Crested Caracara is a strikingly patterned, broad-winged opportunist that often feeds on carrion. Aggressive, it may chase ...

A large falcon of the arid west. The Prairie Falcon is nearly the size of the famous Peregrine Falcon, but differs in its hunting behavior, often pursuing small prey with rapid, maneuverable flight ...

This dark, long-bodied diving bird floats low in the water with its thin neck and bill raised; perches upright near water with wings half-spread to dry. The Double-Crested Cormorant (which rarely ...

Cowboys sometimes called these owls 'howdy birds,' because they seemed to nod in greeting from the entrances to their burrows in prairie-dog towns. Colorful fiction once held that owls, prairie-dogs, ...

The Summer Tanager sings a languid song in southern woods, sounding like a lazy American Robin. Seeing the bird may require some patience, because it usually moves rather slowly in the treetops, often ...

In leafy woodlands of the East, the Rose-breasted Grosbeak often stays out of sight among the treetops. However, its song -- rich whistled phrases, like an improved version of the American Robin's ...

Until the 1970s, the Boat-tailed Grackle was considered to be the same species as the Great-tailed Grackle, but the two forms overlap on the coasts of Texas and Louisiana without interbreeding. The ...

Named for its ringing kis-ka-dee calls, this bird seems to break the rules for the flycatcher family. Besides flying out to catch insects in the air, it also grabs lizards from tree trunks, eats many ...

Extensive freshwater marshes are the favored haunts of this large, stout, solitary heron. It is seldom seen as it slips through the reeds, but the odd pumping or booming song of the American Bittern ...