The Florida Keys extend from the state's peninsula like a string of pearls, and pearls they are, in their uniqueness and value. Stands of hardwood trees rise above the islands' level ground. These trees draw many birds of the Caribbean to the keys' tropical habitat. One of these is the…

During the winter of 2009-2010, thousands of Brown Pelicans washed ashore on Pacific beaches, wet, cold, starving. Fierce storms, thought to be more frequent because of global climate change, probably made it difficult for the birds to feed. And storm-water runoff washed oil and pollutants…

How do Black-capped Chickadees manage to survive the rigors of winter at high latitudes? For survival, chickadees have three things going for them: they're insulated, they're active, and they have a good memory. Thanks to a half-inch coat of feathers, the Black-capped Chickadee maintains…

Thousands of hummingbirds - including these Ruby-throats - are now in southward migration. Hummingbirds that summer in the western US will arrive in the mountains of southern Arizona. (Ruby-throats take a more easterly route.) Countless hummingbird feeders provide continuous nectar in this…

Why are blackbirds black? One possible answer is that black is conspicuous against just about all of Nature's backgrounds. Blackbirds, like this flock of Red-winged Blackbirds and Yellow-headed Blackbirds, feed on the ground. Whenever a predator approaches, they take flight. Coming…

When you encounter a flock of wild guineafowl anywhere from Senegal to South Africa, they will usually be running, squawking as they go, obviously panic-stricken about something. Guineafowl are funny-looking birds, and their actions and calls are even funnier. These are calls of alarm…

The male Bufflehead performs his extravagant courtship display often. He swims toward the female, bobbing his head up and down at a speed that makes you fear for his neck. He takes off and flies over her with head held low. Then he lifts his head, raises his bushy crest, and skis back on…

Related to shearwaters and petrels, the Northern Fulmar will eat just about anything it finds on the surface of the ocean, from fish and squids to dead whales. Fulmars are polymorphic, that is to say they come in more than one color. This difference is independent of sex and age. The…

In its flight display, the male Long-billed Curlew flies up with rapidly beating wings and glides down, then up again and down, stitching a series of arcs across the sky and calling all the time. Their loud flight calls warn of the presence of potential predators. Long-billed Curlews are…

Despite its name, the Northern Waterthrush is really not a thrush: it's a warbler. But unlike most warblers, waterthrushes feed on the ground. They winter in the tropics, where they frequent the edges of ponds and mangrove swamps. Where might you find a Northern Waterthrush? Find out at…