Ducks that start laying eggs soon after arriving at a suitable nest site are sometimes called “capital” breeders, because they carry with them, in their bodies, all the food and fat reserves they need to begin nesting when they arrive. “Income” breeders arrive at their nesting sites after…

A roosting owl often leaves visual clues to its whereabouts — a scattering of furry, oval objects below its perch — in the form of pellets. Because owls such as this Great Horned Owl often swallow their prey whole, their digestive system has to deal with bones, fur, and feathers. The owl’s…

In February, winter still holds sway over much of North America. But in Argentina, it’s summer, and birds are in full voice. Argentina’s national bird, the Rufous Hornero, belts out a rapid trill while the Rufous-bellied Thrush sings its lovely song. In the tropical forests of northeastern…

Look closely and you’ll see: the European Robin’s breast isn’t red. It’s actually a distinctly orange color. So why “Redbreast” and not, you know, “Orange-breast”? It may be because the word “orange” just wasn’t an option when the bird was named. Oranges — the fruit — first arrived in…

The Bald Eagle stands proud as our national bird, spreads its wings on our national emblem, and serves as mascot of countless sports teams. So prominent is this iconic bird in our culture that we sometimes overlook a second, equally majestic eagle: the Golden Eagle. While Bald Eagles are…

Do Snowy Owls hunt during the day or at night? As they are normally arctic birds, Snowy Owls are adapted to hunt both during the long hours of summer and the near-total night of winter. During the winter, these birds can sometimes be found as far south as the northern United States, where…

During much of his life, Edward Lear, the poet who wrote The Owl and the Pussy-cat, was known for his paintings. Lear’s first major project was a book of paintings of parrots, inspired in part by the friendship and mentoring of John James Audubon. He spent years traveling the globe…

A birder may have a target bird so elusive that the bird becomes a kind of "jinx bird." But there was a real bird by that name! The bird once called the "jynx" is known today as the Eurasian Wryneck. When a wryneck is threatened, it twists its head like a snake and hisses. This behavior…

Named for its rhythmic calls, the Black-legged Kittiwake as it is known in North America - it's also known as the Common Kittiwake - is a dapper, oceanic gull. As described by Roger Tory Peterson, the tips of its pale gray wings "are cut straight across, as if they had been dipped in ink."…

Where have the birds of summer gone? The Swainson's Thrush is wintering in Central or South America, maybe as far south as Bolivia. Warbling Vireos are now spread through much of Central America, while Black-headed Grosbeaks have migrated to Mexico. This Orange-crowned Warbler also makes…