In marshes across the country, birds awaken on a summer morning. Tall dense grasses and reeds often make marsh birds hard to see, but their voices carry easily across the lush, green landscape. You can hear birds like the Redhead, the Sora, the American Bittern, the Ruddy Duck, this Yellow…

Planeando en silencio sobre la tierra con sus amplias alas negras, los buitres casi no necesitan presentación. Los conocemos como el equipo de limpieza de la naturaleza, alimentándose de animales muertos y en descomposición. Una serie única de adaptaciones les permite a buitres como este…

What a comfort it would be if every bird song were as easy to recognize — and remember — as that of this Olive-sided Flycatcher. Some people think it sounds like "quick-THREE-beers" or "what PEEVES you." Do you drink coffee? Then you can help Olive-sided Flycatchers, when you choose to…

A chill wind ruffles the feathers of a male Sagebrush Sparrow (formerly known as the Sage Sparrow), as he sings atop a tall sagebrush. It is late February, a few miles from the Columbia River in Central Washington. Sagebrush Sparrows are arriving north from wintering in the Southwestern…

The spider’s web is an intricate piece of precision engineering. Made from large proteins, it’s sticky, stretchy, and tough. So it’s no surprise that many small birds — including this Anna’s Hummingbird — make a point of collecting strands of spider silk to use in nest construction. Spider…

When a soaring Short-toed Snake-Eagle spots a delicious snake, it swoops down, grabs it with its talons, then tears off the snake’s head. Still on the wing, it swallows the entire snake, head first. Smaller than Bald Eagles, they live mainly in Africa and have legs and toes covered in…

A male Eastern Bluebird stands on a wooden nestbox attached to a fence post. The bluebird’s song – and his alert presence – assert his claim to this territory. In the mid-20th Century, the numbers of bluebirds in the Northeast declined to the lowest level ever, due largely to nesting…

Bird beaks, or bills, come in many shapes and sizes. And birds use them for just about everything: to collect food, preen, fight, court, and more. In order for a bird to fly, its beak must weigh as little as possible. Beaks are covered with a sheath of a tough material called keratin…

The Reddish Egret, a particularly glamorous heron, is best known for its startling antics in capturing fish. When fishing, the egret sprints across the lagoon, weaving left and right, simultaneously flicking its broad wings in and out, while stabbing into the water with its bill. Fish…

Hummingbirds are built for hovering flight, with flexible wrists that rotate their wings in a rapid figure-eight motion that generates almost constant lift. Eurasian Skylarks, on the other hand, hover by fluttering their wings 10-12 times per second, singing all the while. Some raptors…