As the sun sets over the Connecticut River, as many as 300,000 Tree Swallows gather on the wing in one huge, tightly choreographed flock. With dusk at hand, the aerobatic flock - now shaped like a tornado - swoops down into the tall reeds. It takes but 15 seconds for the 300,000 birds to…

By this time in September, most migratory birds have departed. Many resident birds remain, but their voices are now quiet. During fall and winter, birds don't need to sing to establish a breeding territory or attract a mate. Many songbirds lose the ability to sing. The part of the brain…

Among the great firs and Ponderosa pines of Stanislaus National Forest in central California, Northern Goshawk nestlings crowd a platform nest of branches and pine needles halfway up a mature fir tree. In 2013, what’s known as the Rim Fire occurred, and some of the area burned with high…

A hike through the mountains of the West, from the lowlands to the rocky alpine zones, reveals an incredibly diverse array of beautiful birds: Swainson’s Thrushes, Pine Grosbeaks, American Pipits and so many more to be found.

Generations of birders have puzzled over how to tell Downy Woodpeckers from Hairy Woodpeckers. The two species’ patterns of black and white feathers are so alike that it was long thought they were the closest of relatives. The two live in similar woods, nest in similar trees, and eat many…

Birds are an inspiration for many musicians. Before writing “The Penguin,” Raymond Scott probably saw these birds at the Central Park Zoo. Though penguins are clumsy on land, Gentoos like the ones pictured here are the fastest of any diving bird, reaching 22 miles an hour. Speaking of…

The Field Sparrow was the first bird song Aldo Leopold awoke to on his farm in the 1940s. In his Sand County Almanac, a classic of conservation and nature writing, Leopold brought to life scenes of nature, a month at a time. Field Sparrows aren't as common today as they were in Aldo…

In early June, millions of birds arrive on the Arctic Coastal Plain in Alaska, from all over the world. They're there to attract a mate and raise their young. One shorebird, the Pectoral Sandpiper, has a pectoral sac on its chest. It stands on the ground and inflates this sac, and then…

More than 20 years ago, Professor Ed Rubel of the University of Washington discovered that chickens could repair their own damaged hearing. The birds regrow tiny structures in the inner ear, known as auditory hair cells. Most vertebrates can regenerate these cells - but mammals cannot…

Each year, the plaintive song of the Eastern Wood-Pewee carries through the forests of eastern North America. For the past 25 years, the number of Wood-Pewees has fallen. But providing economic incentives for private landowners to save forests can help. So can enacting policies that…