When a Northern Flicker takes flight, a bold patch of white feathers flashes on its rump, in contrast to its brown body. This white rump likely evolved as an anti-predator adaptation. A hawk flying in pursuit of a flicker may focus on the white spot rather than the darker image of the…

Henry David Thoreau wrote, "Our little mountain-ash is all alive with [birds.] A dozen robins on it at once ... plucking the berries... A robin will swallow half a dozen berries, at least, in rapid succession..." If you, too, enjoy watching birds eat berries, then consider planting trees…

In the past few decades, a number of species have spread north from California into Oregon, Washington, and even to British Columbia. Red-shouldered Hawks, Black Phoebes, Lesser Goldfinches, and others that were rare in Washington State 20 years ago now turn up regularly. One common…

How do birdwatchers identify one species from another? First, they look carefully at the bird. What's the overall color? Is its bill long or short, thin or stout? What about its markings -- a ring around its eye or stripe on its head? What's your bird doing? Bird behavior can help you sort…

One of the best studies of a North American bird ever written was published by a citizen-scientist named Margaret Morse Nice. Margaret Nice banded more than 800 Song Sparrows in a 40-acre tract in Ohio. Most of us have neither the time nor the 40 acres, but there is still much we can do…

The familiar components of a hummingbird feeder include a bottle, sugar water, and something red to attract the birds. (But not the water, please! Food coloring can be harmful to hummers. Here's a healthy recipe.) Feeding hummingbirds such as this Anna’s Hummingbird may seem like a recent…

You can find European Starlings in huge flocks from coast to coast, and from Northern Canada deep into Mexico. Yet not one of these iridescent-black, yellow-billed starlings is native to the Americas. One hundred starlings were released in Central Park in New York City in 1890. From that…

When small family farms gave way to large, industrial agricultural operations, the Snow Geese followed. Waste grain left over from harvests has allowed Snow Goose populations to jump. Now, there are so many Snow Geese they degrade their Arctic summer habitat, threatening other birds. Is…

Project FeederWatch, sponsored by the Cornell Lab of Ornithology and National Audubon, is a window on the birds of winter. Through Project FeederWatch, scientists are able to track the movements of birds - including this Pine Siskin - and understand trends in population and distribution…

High in the mountains, a Clark's Nutcracker buries a cache of whitebark pine seeds. This will be nearly its sole source of food until the next summer. But some of those cached seeds will germinate, spawning a small grove of pines. Whitebark pines are one of more than 20 species of pines…