A typical songbird belts out its song between 1,000 and 2,500 times per day. Even though most bird songs last only a few seconds, that's a lot of warbling! A Yellowhammer, a European bunting, may sing over 3,000 times a day. But the Yellowhammer doesn't even come close to the North…

The Arctic is still wintry when male Snow Buntings return to nesting areas in April. There's a big benefit to arriving early enough to claim a prime nest cavity in a rock face or under boulders, where it will be safer from predators. Nesting in chilly rock cavities means extra care must be…

Este pingüino emperador se alimenta de pescado y calamar en el océano congelado. Meterse al mar es sencillo, pero salir de él es otra historia. ¿Cómo logra un pingüino levantar ese cuerpo regordete de 35 kilos por encima de salientes heladas de varios pies de altura , mientras esquiva a…

When glaciers pushed south into what is now the U.S. around 20,000 years ago, they scraped off the soil layer and spelled the end of native earthworms except in the southern states. So the earthworm plucked by the robin in the park or on your lawn is probably a relatively new arrival, most…

Standing less than six inches tall, with gray feathers and big yellow eyes, the Elf Owl weighs less than an ounce and a half — that’s a bit less than a golf ball. But don’t let their size fool you. The Elf Owl hunts beetles, crickets, and spiders, plus the odd lizard or mouse. Even larger…

At sunset, the male American Woodcock – a plump, robin-sized bird – walks slowly on short legs from the cover of the forest to a nearby clearing. After a few sharp calls, the woodcock takes flight. As he spirals upward, slim, stiff feathers at his wingtips create a curious twittering. At…

Birds evolved not only wings, but many other adaptations that make it possible to fly. Feathers provide insulation, waterproofing, and a lightweight means to become airborne. Birds have honeycombed or hollow bones, reducing body weight. And instead of weighty jawbones and teeth, birds…

Zone-tailed Hawks of the American Southwest look a lot like Turkey Vultures. And they often soar among groups of Turkey Vultures. By consorting with vultures, Zone-tailed Hawks gain a distinct advantage as predators. While doves and lizards would quickly flee the flight silhouette of a Red…

People often say that spring “bursts” forth. But this seasonal change isn’t like flipping a switch. It’s more like a series of waves breaking slowly. Robins and bluebirds return north in March. During April, more songbirds migrate north from the tropics, adding to spring’s growing chorus…

Presente en gran partede Centroamérica, las parvadas de la urraca copetona son grupos familiares liderados por una hembra dominante. Incluyen a su pareja y varias crías femeninas que llevan alimento a la hembra principal y a sus crías. Es un ejemplo de crianza cooperativa, cuando aves que…