All birds need to sleep — or at least snooze — sometime during each 24-hour period. And most sleep at night. A bird, like a Mallard duckling, may turn its head around and warm its beak under its shoulder-feathers. Songbirds find a protected perch, sheltered from rain and nighttime…

For the majority of the year, most birds stay under 500 feet. During migration, many species fly at 2,000 to 5,000 feet or above, using prevailing winds to assist them. And some birds go even higher! In 1973, a Rüppell’s Griffon set the world record by soaring to 37,000 feet.

Some birds, such as the Northern Bobwhite, get their name from their songs or vocalizations: "Bobwhite! Bobwhite!" The Killdeer is another bird named for its song: "Kill-dee, kill-dee, kill-dee." There are others. "Poorwill, poorwill, poorwill," says this Common Poorwill. This bird is the…

Los pelícanos café ( Pelecanus occidentalis) vuelan pegaditos a la superficie del agua. Hacen círculos en lo alto, y luego se sumergen en clavado, con la cabeza por delante, para atrapar peces. Pero, ¿eso no los lastima? Varias adaptaciones protegen a los pelícanos mientras se sumergen…

Brown Pelicans fly just above the surface of the water. They circle high, then diving headfirst, plunge under water to catch fish. But doesn't that hurt? Several adaptations protect pelicans as they dive. First, they have air sacs beneath the skin on their breasts, which act as cushions…

By late summer, the male Mallard’s need for fancy feathers to attract the females has passed. These birds have molted, and their bright feathers are replaced with mottled brown ones. Subdued colors help camouflage the male ducks, protecting them from predators. Come fall, the male Mallards…

Social, chatty, ubiquitous, the House Sparrow has adapted to living in cities, suburbs, and rural areas. Like most birds, these sparrows enjoy a daily bath. Set out a birdbath, and you can watch them chatter, splash, and shake, sending droplets flying. Birds like very shallow water; an…

Although many seabirds utter groans and croaks, the Pigeon Guillemot produces a lovely series of trills and whistles. As part of their courtship, they fly side by side in large circles and loops, a perfectly synchronized flying act. These guillemots do not breed until they are between…

Young birds leave their nests in different ways. Some shuffle tentatively along the nearest branch and practice flapping their wings, while others take the "big leap." Which path they take depends upon their species and the location of the nest. Young Great Horned Owls clamber out of the…

In the Arctic National Wildlife Refuge, June days offer almost continuous daylight to breeding birds, including this Black-bellied Plover. At this high latitude, Black-bellied Plovers can complete their breeding cycle in a month and a half. Not long after the summer solstice, the adults…