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migration

Swans Come Calling

Trumpeter Swans land in a plowed field to forage for remnant potatoes, grain, and other waste crops. This swan is among the largest of all waterfowl; the Tundra Swan is somewhat smaller. These swans migrate in family groups each fall from nesting sites in Canada and Alaska. Learn more about these... read more »

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Topics & Themes:  migration

Swallows Return to Nest

Each spring, eight species of swallows — including this Barn Swallow — migrate north from the tropics to nest in North America. Tree Swallows and Purple Martins are especially dependent on man-made nestboxes. Tree Swallows nest over much of the continent, while Purple Martins are most prevalent... read more »

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Topics & Themes:  migration, nesting

Tree Swallows March North

Every March sees the annual spring migration of Tree Swallows. The swallows spend the winter along the Caribbean, in Central America, and in the warmest parts of South Texas and California. Some will nest as far north as northern Alaska and Canada. Tree Swallows nest only in cavities, such as old... read more »

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Topics & Themes:  backyard sanctuary, migration

Tune Up Your Ears - East

By March in the East, cardinals and other songbirds that don't migrate are already singing heartily to attract mates. Many other birds - including this Yellow Warbler - will return north from the tropics in April and May, announcing themselves in song as soon as they arrive in nesting areas. Now... read more »

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Topics & Themes:  migration, vocalization

Swallows and Mud - A Myth?

The swallows that make mud nests in spring and catch flying insects all summer are now far south in Mexico, and Central and South America. It's only as recently as the end of the nineteenth century that ornithologists agreed that swallows, including this Cliff Swallow, migrate. Many formerly... read more »

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Topics & Themes:  migration, myth

Tree Swallow Roost

As the sun sets over the Connecticut River, as many as 300,000 Tree Swallows gather on the wing in one huge, tightly choreographed flock. With dusk at hand, the aerobatic flock - now shaped like a tornado - swoops down into the tall reeds. It takes but 15 seconds for the 300,000 birds to vanish... read more »

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Topics & Themes:  migration

Tanagers - Coffee Birds

This Scarlet Tanager (R), its cousin the Western Tanager (L), and your latte have a connection. Much of the birds' prime wintering habitat has been turned into coffee plantations. When shade-giving trees are cut down to grow coffee in direct sunlight, the tanagers' winter habitat is also removed.... read more »

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Topics & Themes:  migration

Vultures Sail the Strait

From atop a thermal, Turkey Vultures in groups of up to 200 sail across the Strait of Juan de Fuca, making landfall near Salt Creek County Park on the Olympic Peninsula. The Olympic Peninsula Audubon Society sponsors a free field trip to witness this autumnal passage. Check out that or other... read more »

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Topics & Themes:  migration

Swainson's Thrush, Power Napper

When the Swainson's Thrush departs its wintering grounds in Mexico or South America, it travels at night. When does it sleep? Recent research by scientists at Bowling Green State University suggests that during migration, Swainson's Thrushes take hundreds of "power naps," lasting only a few... read more »

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Topics & Themes:  migration, science

Early Spring Songs (SE Alaska)

In March, we welcome the lengthening days and the renewal of bird song. Among the earliest spring singers in the SE Alaska are American Dipper (left), American Robin, and American Tree Sparrow. Listen to the songs of these early spring songsters and thousands of others at Cornell University's... read more »

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Topics & Themes:  migration, vocalization

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