Two eagles locking talons high above the ground might look like they’re risking injury, but it’s a normal courtship behavior called the “cartwheel display.” Fully entangled, the two birds begin spinning to the earth, disengaging just before they smack the ground. Their clasp could last for…

Long-tailed Ducks are back for the winter from the north, where they nested on tundra ponds and marshes. These diving ducks spend the winter in deep salt water, often in sheltered bays. Long-tailed Ducks are far more vocal than most ducks, a feature that has earned them a host of charming…

There are nearly ninety species of wrens in the world, and quite a few are exceptional singers. Nearly all of them reside in the Western Hemisphere, with the majority living in Central and South America. The White-bellied Wren ranks among the tiniest, at just under four inches, while the…

Polar Bears symbolize the icy landscapes of the far north like no other animal. The bear's way of life — its very survival — is inseparable from the Arctic pack-ice. Less familiar is a remarkable bird that shares with the Polar Bear this vital link to ice: this Ivory Gull. The gulls feed…

From his start in 1937, the gangly, black-feathered Daffy Duck was a cartoon original: wildly outspoken, volatile, and confrontational — a truly daft duck. Daffy was one of the most memorable characters from the golden age of cartoons, paving the way for other screwball cartoon…

A bird known as Titanis walleri made its home in Florida just a few million years ago. Titanis, as its name suggests, was titanic indeed — a flightless predator, 5 feet tall, with a massive hooked bill. Titanis and other birds related to it belong to a group some paleontologists call the…

To hear a Common Loon in the wild during summer, you’ll need to find a northern, freshwater lake where a pair is nesting. But to find that same Common Loon in winter, you’ll likely need to look on a saltwater bay. This shift from fresh to salt water would kill most animals. But loons —…

Para escuchar a un colimbo común ( Gavia immer) en la naturaleza durante el verano, tendrás que buscar un lago de agua dulce en el norte, donde haya una pareja anidando. Pero para encontrar ese mismo colimbo en el invierno, probablemente tendrás que buscarlo en una bahía de agua salada…

While many shorebirds have gone south, tiny sandpipers called Sanderlings are easy to find on winter shores. They follow the waves as they lap in and out, probing the swirling sand for prey. They often eat various small crustaceans such as mole crabs, isopods, and amphipods. But they also…

Named for its rhythmic calls, the Black-legged Kittiwake is a dapper, oceanic gull. As described by conservationist Roger Tory Peterson, the tips of its pale gray wings "are cut straight across, as if they had been dipped in ink." Unlike many gulls, kittiwakes spend most of the year at sea…