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migration

Geese Aloft: Flock Voices of March

Geese migrate north between February and April, making stopovers along the way to rest and eat. Most are bound for their breeding grounds in the far north. But we’ll hear them again soon, on their way back south in October. Click play and learn how to tell some North American species apart by... read more »

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Topics & Themes:  migration, vocalization

Common Poorwills Can "Hibernate"

Common Poorwills don’t sing much when the mercury drops. But they can do something else that is remarkable. As the winter cold deepens, these petite members of the nightjar family can enter a hibernation-like state — and stay like that for hours — or even weeks! Scientists call it torpor. It... read more »

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Topics & Themes:  migration

Western Tanagers Are Flashes of Bright Color

Western Tanagers dart from tree to tree, on the lookout for delicious bugs. They’ll find them by scanning the tree bark — or maybe snatching them from mid-air during flight — a tactic called hawking. Come winter, these lovely songbirds head south, where they fit right in with the other brightly... read more »

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Topics & Themes:  migration

Ospreys Head South

Ospreys may log more than 160,000 air miles over a lifetime. One female Osprey in Massachusetts, which researchers tagged in 2008 and named Penelope, headed south in early September, later reaching the Bahamas. After pausing in the Dominican Republic, she traveled to the Island of Birds, off... read more »

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Topics & Themes:  migration

Spring Migration Across the Globe

Each spring, millions of birds head north. From Ecuador, beautiful Scarlet Tanagers fly to the eastern US and Canada, many traversing the Gulf of Mexico, an arduous journey. Across much of southern Europe, Common Nightingales – small thrushes with russet feathers – are arriving, having traveled... read more »

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Topics & Themes:  migration

The Swallows of Capistrano

Every year, the change from winter to spring brings millions of Cliff Swallows from Argentina to North America. Since the early 1800s, swallows had returned, year after year, to the Mission of San Juan Capistrano. But during a restoration project in the 1990s, the venerable mud nests were removed... read more »

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Topics & Themes:  migration, nesting

Turkey Vultures on the Move

Before we see or feel spring, we often hear it first — in the testimony of a Red-winged Blackbird, the energy of a Song Sparrow, or the serenade of an American Robin. But across much of North America, an earlier sign of spring is the return of Turkey Vultures. In the US, you may see them as early... read more »

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Topics & Themes:  migration

Ancient Murrelet Migration

We're used to birds migrating north to south and south to north. But the Ancient Murrelet migrates east to west and back across the North Pacific. These plump seabirds nest in colonies in old-growth forests. But where do they go in winter? After breeding, many Ancient Murrelets migrate westward.... read more »

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Topics & Themes:  migration

Mississippi Kites

The Mississippi Kite is one of America's most elegant raptors. These dove-gray birds spend the summer hunting over plains and woodlands in the southern United States. They often nest colonially — unusual for hawks — with a half-dozen pairs in sight of one another in a grove of tall trees. By... read more »

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Topics & Themes:  migration, nesting

Alpine Swifts Fly Nonstop

How long can a bird fly without touching the earth? To find out, Swiss scientists attached sensors to Alpine Swifts. The sensors showed long periods when the swifts were gliding and not flapping their wings. Were the birds asleep? Scientists don’t know for sure. It could be that Alpine Swifts... read more »

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Topics & Themes:  flight, migration

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