The Northern Shrike breeds in the tundra and taiga of the north, but migrates south into the lower 48 for the winter. It has a pleasing and rhythmical song, which it sings even in winter. But its song belies a rather bloodthirsty feeding habit. The shrike impales its prey on sharp thorns…

Once nesting season ends, swallows know it's time to party! Whether they nest as single pairs or in large colonies, both adults and juveniles now gather on electrical wires by the dozens, socializing before they migrate. Migrating by day – and foraging for insects as they go – swallows…

After young birds have left the nest and can fly short distances, they still follow their parents and beg for food. They squawk and assume a begging posture, wings drooping and head hunched down. Most young birds, including this Crow, depend on their parents for days, weeks, or even months…

Waterfowl like this Muscovy duckling spend up to 30 days in the egg, so they’re able to walk, swim, and feed themselves as soon as they hatch. We call these chicks precocial. By contrast, the chicks of most songbirds spend less time maturing in the egg. They must continue to develop in the…

The Belted Kingfisher dashes through the air, warning intruders with its rapid-fire, rattling call. In spring, the best places to see Belted Kingfishers are along sandy banks -- they are busy digging burrows, where they will nest. The holes typically reach three to six feet into the bank…

It's spring! And for many birds, a time to look their best to attract a new mate. This American Goldfinch has recently molted. Its old, worn-down feathers have fallen out, and new ones have grown in. When goldfinches molt in the fall, they lose these brightly colored feathers. Their winter…

Mallards are found virtually everywhere there is open water, from city parks and subalpine lakes to sheltered bays and estuaries along the coasts. In their breeding plumage, male Mallards are avian dandies. The male's primary goal is to attract a mate and defend the breeding territory. The…

Groove-billed Anis gather in loose groups. And with good reason. They nest communally. As many as four or five pairs of birds may use one nest, a bulky cup of twigs lined with fresh leaves. When the dominant female ani begins to lay her own eggs, the other females lay simultaneously. Up to…

A single Canada Goose has between 20 and 25 thousand feathers. Some are designed to help the bird fly or shed water. Many are the short, fluffy kind, the down that insulates the bird from the cold. Birds survive in sub-zero weather by fluffing their feathers, creating layers of air and…

The 22-inch Great Horned Owl has two tufts of feathers that stick up from the top of its head. This owl is difficult to see, but it's often heard during dark winter evenings and pre-dawn mornings. A pair of owls may call back and forth or overlap their hoots. The male's call is slightly…