In winter, the Cerulean Warbler forages in tree-tops of the Andes Mountains. In May, at the other end of a 2,500-mile migration, the very same bird sings from the tree-tops in the Appalachian Mountains. The Cerulean Warbler is one of the most threatened birds in the US. American Bird…

In World War I, carrier pigeons were crucial in relaying messages from the front to positions behind the lines. The most renowned was Cher Ami - or Dear Friend - flown by the US Army Signal Corps during the Battle of Verdun in France. The message Cher Ami carried on October 4, 1918, was…

When small family farms gave way to large, industrial agricultural operations, the Snow Geese followed. Waste grain left over from harvests has allowed Snow Goose populations to jump. Now, there are so many Snow Geese they degrade their Arctic summer habitat, threatening other birds. Is…

A bird’s stomach is divided into two parts. The first part is a lot like our stomach; it’s filled with digestive juices to break down food. But the second part — that’s the bird’s gizzard. It’s a strong, muscular pouch that breaks down hard foods like seeds and nuts. Support for BirdNote…

What looks like feet on a bird are actually its toes. That backward-looking knee is more like an ankle. A bird’s feet are suited to its unique way of living. Eagles capture live prey with long talons, while water birds use webbed feet to guide and propel themselves. And ostriches have two…

Three-quarters of Hawaii's native flowering plants probably came from seeds that hitched rides with birds. Sticky or barbed seeds adhere to the feathers. Other seeds travel in mud caked on a bird's feet. And still others cross the ocean in the stomachs of birds. The most likely seed…

Deep in the dense, remote swamps of Central Africa lives the Shoebill, a massive, blue-gray stork-like bird, standing up to five feet tall. The bird takes its name from its large bill, which is shaped like an oversized Dutch wooden shoe. Although the Shoebill may look comical, its beak is…

Some early sailors, visiting remote Pacific islands, surely feared that the ungodly wailing on shore meant they had been tricked to the gates of Hell itself. In truth, they stood among courting pairs of seabirds called Wedge-tailed Shearwaters. These birds nest on islands in the tropical…

High in the mountains, a Clark's Nutcracker buries a cache of whitebark pine seeds. This will be nearly its sole source of food until the next summer. But some of those cached seeds will germinate, spawning a small grove of pines. Whitebark pines are one of more than 20 species of pines…

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…