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migration

American Redstart - The Tale Is in the Tail

Who knew that this American Redstart’s feathers could reveal so much information about its life? For example, the more intense the color of a male American Redstart’s feathers, the better his chances of holding a good winter territory, which means access to good nutrition. Being well fed and in... read more »

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Topics & Themes:  breeding display, ecology, migration, plumage

Hummingbirds - To Feed or Not to Feed?

Have you wondered about the right time to remove your hummingbird feeders during fall? Consider leaving your feeders hanging for a week or two after you’ve seen the last hummingbird of the season, just in case a late migrant stops by to fatten up. However, Anna’s Hummingbirds – like the one... read more »

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Topics & Themes:  birdfeeding, migration

South Polar Skuas - Bullies of the Oceans - with Tom Johnson

Meet the South Polar Skua, a predatory seabird. During summer in Antarctica, South Polar Skuas feed their young on the chicks of other seabirds. And once their breeding season ends, the skuas fly to northern oceans, such as the North Atlantic, to find large flocks of shearwaters, gulls, or terns ... read more »

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Topics & Themes:  migration

The Importance of the Yellow Sea - With Nils Warnock

For shorebirds like Bar-tailed Godwits, Black-bellied Plovers, and Dunlin, mud matters. Few mudflats are more important than those of the Yellow Sea along the coast of China, and North and South Korea, where more than 70 species of shorebirds rest and feed. For several species of shorebirds,... read more »

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Topics & Themes:  ecology, migration

More Information than from 100 Years of Bird Banding

Geolocators are revolutionizing our ability to track migrating birds. When mounted on the backs of birds like this Common Swift, these tiny technological backpacks reveal fascinating information. For example, when researchers in Europe used geolocators to study Common Swifts, they discovered a... read more »

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Topics & Themes:  migration, science

Purple Martins Head South to the Amazon

The Purple Martin is the largest swallow that nests in the US and Canada. During fall, Purple Martins from western North America migrate to a distinct wintering area in southeastern Brazil — a travel distance of more than 5,000 miles! Scientists believe that Purple Martins started out as a South... read more »

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Topics & Themes:  migration, science

Geolocators Reveal Secrets of Landbird Migration

Geolocators are revealing fascinating information about the lives of migratory birds. These devices are so light that they can be mounted on the backs of even small birds like the Wood Thrush pictured here with its nestlings. Thanks to geolocators, we know that many Wood Thrushes return to the U.... read more »

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Topics & Themes:  ecology, migration, ornithology, science

Counting North America's Waterfowl

In autumn, millions of North American waterfowl – like these Redheads – migrate south. They come from Alaska, the prairies and forests of Canada, the Pothole region of the Dakotas, and Eastern Montana. Their arrival is awaited by birders and hunters alike. Because waterfowl are a vital natural... read more »

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Topics & Themes:  migration, nesting, science

How Evolution Works, Featuring Dr. Mike Webster

After breeding in Alaska, some Swainson’s Thrushes migrate across Canada to the East Coast before turning south to Ecuador. Others migrate directly down the Pacific Coast to the same destination. Why are some are traveling twice the distance? Dr. Mike Webster of the Cornell Lab of Ornithology... read more »

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Topics & Themes:  ecology, migration, science

Radar Ornithology with Dr. Cliff Mass

Did you know that weather radar can track the migration of birds? Dr. Cliff Mass, Professor of Atmospheric Sciences at the University of Washington, describes the radar images from a massive migration through the Puget Sound region of Washington State. Shortly after midnight on September 8, huge... read more »

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Topics & Themes:  migration, science

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