For birds and other animals with good natural insulation, winter provides a striking benefit as they scavenge. Bacteria function very slowly or not at all in the cold, preventing dead bodies from rotting. In northern latitudes, ravens and other scavenging birds take advantage of winter's…

Great Black-backed Gulls have a reputation as serious predators of other birds. During the nesting season, they’ll prey on eggs and nestlings of other seabirds. They’ll also hunt adult seabirds including puffins and grebes, as well as songbirds as big as a grackle.

The secret to birds’ flight starts with the shape of their wings. They’re curved in a way that causes air to flow more slowly under the wing than above it. That creates an area of low pressure just above the wing that pulls the bird up into the sky—a force called lift. Airplane wings are…

Kererū, green-blue pigeons native to New Zealand, like to sun themselves after dining on fruit. But in warm summer months, the bird’s sunbathing has a surprising side-effect. A part of their digestive system called the crop stores their latest snack – where it begins to ferment, eventually…

Gentoo Penguins live in the frigid waters of the Atlantic. Only recently have scientists begun to unravel why penguin feathers don’t freeze. An electron microscope revealed tiny pores on the feathers that trap air, making the surface water repellent. This feature, plus a special coating…

The Cuban Giant Owl, now extinct, was 3½ feet tall and weighed 20 pounds — the largest of all known owls. It had very small wings, running after its prey on long, powerful legs. Similar large owls, with long legs and small wings, have been unearthed in places as disparate as Georgia and…

Pigeons — and other birds with eyes on the sides of their heads — have a different view of the world from that of creatures with forward-facing eyes. The images from a pigeon’s eyes overlap slightly, so the bird can see in front of itself, even though it has worse depth perception. But…

Birds like male turkeys or barnyard roosters have a wrinkly, bumpy flap of red skin called a wattle. But what are wattles for? Birds can’t sweat, so wattles help release excess heat. Wattles are also key to courtship displays. Many other birds, including some storks and plovers, also have…

The Red-backed Fairy-Wren, a tiny songbird living in the Australian scrublands, is highly territorial and promiscuous. The male can’t be sure the eggs in his nest are his own. One way to help avoid this problem? The male may rough up a rival who approaches his territory. But research shows…

BirdNote is an independent nonprofit organization, and this week, we’re asking you to support BirdNote with a donation at birdnote.org. But today, rather than tell you all the great things about BirdNote, we’re going to let our feathered friends do the talking. In this show, enjoy a minute…