A modest thicket of trees along a street can be the perfect place to hear one of the earliest bird songs of spring: the Fox Sparrow. You can hear their loud, spirited songs from dense vegetation throughout much of the U.S. The easternmost birds have the rufous color of a Red Fox. Others…

A captive breeding program has helped set California Condors on the path to recovery. But when biologists reviewed the family tree for the breeding program, they found a big surprise. Two chicks had DNA that linked them perfectly to their mothers but didn’t match a single male. They arose…

Thousands of years ago, rising sea levels isolated much of the Florida peninsula as an island. During that long isolation, a unique oak-scrub ecosystem developed. The Florida Scrub-Jay is one of many special animals and plants that evolved with this habitat. Because they depend on acorns…

Tree Swallows and bluebirds — like this Western Bluebird — are among the earliest northbound migrants to arrive, heralding spring a month before the equinox. These species will nest only in cavities, such as old woodpecker holes or man-made nestboxes. But the supply of specialized nest…

Gentoo Penguins are the fastest penguins in the world. A group of researchers used the penguin’s streamlined shape to design a new undersea robot called the Quadroin. This robo-penguin has sensors to measure ocean conditions and currents. It’s particularly suited to studying eddies, which…

Ravens are seen as tricksters in many traditions. But Common Ravens have a softer side. During courtship, a pair will often sit side by side, sometimes preening each other's feathers. And during that ritual, one or both may make soft warbling sounds. Raven nestlings sometimes make this…

Thanks in part to the political will and financial contributions of waterfowl hunters and such organizations as Ducks Unlimited, natural wetlands that might otherwise have been lost have been preserved. Take a field trip with your local Audubon chapter to see what you can see. Maybe you'll…

Sailors once believed Wilson’s Storm-Petrels foretold a dangerous tempest. There might be a grain of truth: the tiny seabirds might find a little shelter from the gusts near a ship. Wilson’s Storm-Petrels are found in every ocean. When foraging, their feet patter across the surface…

American Coots settle onto lakes and estuaries, forming rafts of hundreds, even thousands, of birds. They like to feed on aquatic vegetation, and sometimes they lumber ashore to nibble at grasses and agricultural crops. The coot's lobed toes help it swim and maneuver under water. To get…

Even in winter, some birds — including Black-capped Chickadees, House Finches, and American Robins — greet the sunrise with song. We normally hear the dawn chorus in springtime, when birds sing to define territory and attract mates. But birds don’t breed by warmth alone. Day length is a…