Among the most feared weapons deployed in World War I, submarines sank almost 5,000 ships, sending 15,000 sailors to watery graves. Scientists and navy men worked to come up with a way to detect enemy subs. One thought was to feed wild gulls from a dummy periscope, in the hope that the…

Bobolinks breed in North America and winter in South America. Like many songbirds, they’re classic long-distance migrants. But some Savannah Sparrows fly far south in winter, some fly not so far, and some stay put. This mix of strategies is known as “differential migration.” Sometimes…

April 1 - High above the clouds caressing the upper reaches of the mountains soars the most majestic bird you are never likely to see or hear: the Semi-Fixed-Wing Silver Delirian. With a wingspan of some four yards, a sleek metallic silver body almost as long as its wingspan, and huge…

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…

Rock Pigeons are one of the most common urban birds. But why do we never see baby pigeons? Some baby birds - like down-covered ducks, geese, and chickens - leave their nest shortly after hatching and do a lot of growing up while following their parents around. Others, like pigeons, depend…

The Northern Flicker is a woodpecker, but one that hardly looks the part. Where most woodpeckers are a reliable mix of black, white, and bits of red, the Northern Flicker is buffy tan overall. The undersides of its wings and tail-feathers flash with coppery-red, giving the bird the…

King Rails are the largest rails in North America. And they are also one of the most threatened. American Bird Conservancy is working to save the King Rail by conserving freshwater wetlands and ensuring effective pollution laws. Learn more at ABCBirds.org.

In spring, the loud wing-thumping of male Ruffed Grouse brings new life to northern forests across the continent. These handsome, wily birds reside in the forest year round. And while their numbers rise and fall cyclically, they average nearly seven million. Still, Audubon lists Ruffed…

Denver Holt has spent more than 30 years studying the birds in the field. No wonder he can sound so much like this Boreal Owl! Holt conducts field research on eight species of owls in Alaska and Montana. He says, "I think winter is a blast! We all love trapping and banding in the…

Blackpoll Warblers make the longest migration of any North American songbird, an annual round trip of eleven to twelve thousand miles. In August, the warblers leave Western Alaska and head east across Canada to the Maritime Provinces and the coast of New England. Then, the tiny songbirds…