Sapsuckers drill small holes in the bark of favored trees, then return again and again to eat the sap that flows out. And hummingbirds, kinglets, and warblers come to the sap wells to eat the insects trapped in the sap. Although a sapsucker - like this Red-breasted Sapsucker - may suck a…

The dense cover of coastal chaparral supports many birds found nowhere else in the world, including this California Thrasher. The plant species are different, but the chaparral of California is much like shrubby coastal vegetation in southern Europe, South Africa, southern Australia, and…

It's mid-winter, and a passing flock of robins suddenly drops out of the sky. A moment ago, the yard was empty of birds, but now it's full. They settle in a bush laden with fruits (like this hawthorne). When the robins pass over a fruiting shrub, those red berries signal like a neon sign…

House Finches are familiar birds all across North America. Researchers have shown that the red coloration of males is produced from carotenoid pigments in the birds' diet. Male House Finches develop brighter plumage when they are growing in new feathers, if they eat more fruits containing…

Birds (including Western Gulls, like this one) and people share San Diego Bay -- a deep-water port, navy ships, pleasure boats, and salt-evaporation ponds. Even so, it’s one of the best bird habitats on the West Coast. Western Sandpipers probe the mud for worms and snails. Egrets stalk the…

The Belted Kingfisher is the one species of kingfisher found throughout most of North America north of Mexico. You'll have to go to Texas to see two other kingfishers. The quiet call of the Green Kingfisher - like this one - can be heard at wooded streams and ponds. A Ringed Kingfisher…

A chickadee comes in to the feeder, quickly grabs a seed, and flies away. It may return immediately, but it's more likely to wait its turn. When a whole flock of chickadees moves into the yard, it looks as if they form a living conveyer belt. One chickadee after another flies to the feeder…

The bill and legs of Arctic Terns are shorter than those of Common Terns. Because Arctic Terns breed in the Arctic and winter in the Antarctic, they are subject to much colder weather than are Common Terns. Birds' bills and legs lose heat, because they're not covered by feathers. Birds in…

This White-browed Coucal - also known as Burchell's Coucal - is common in many parts of Africa. "Streaky and sneaky" best describes these birds, because you'll be lucky if you see one. Dew from their dense habitat often dampens their feathers. Then, they hop to the top of a bush and spread…

Many birds that forage in open country, such as Cattle Egrets, benefit from association with large grazing mammals. The mammals scare up insects as they move, making them more visible to the birds. In the egrets’ native lands in Africa, the birds feed with elephants, rhinos, and Cape…