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migration

Saving Chimneys for Vaux's Swifts

Vaux’s Swifts are perfectly adapted to lives spent in the air. They mate on the wing, and their feet and legs are so small they can’t even walk. But they can hang. So at dusk they collect along the inner walls of giant chimneys, at places like Chapman Elementary School in Portland, Oregon.... read more »

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Topics & Themes:  human interaction, migration

A Bird Migrates South, Step by Step

Wood Thrushes migrate more than 2,000 miles each way, between their summer breeding territories in the US and Canada to where they winter in Central America. During migration, the birds will fly for hundreds of miles at night, then stop for days or weeks to refuel. In the spring, they’ll head... read more »

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Topics & Themes:  migration

Genetics and Migration

Scientists have found that, at least for some species, a bird’s genes dictate the route it takes when it migrates. For instance, when subspecies of Swainson’s Thrushes interbreed and produce hybrid offspring, those young birds may take mom’s route north and dad’s route south or zigzag between the... read more »

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Topics & Themes:  migration, science

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

Partial Migration - Killdeer Play Leap Frog

The cries of a Killdeer are familiar across most of the US during spring and summer. But where do they go in winter? Killdeer that breed in the southern half of the US and along the Pacific Coast are year-round residents. But those that breed in the northern US and Canada, where winter conditions... read more »

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Topics & Themes:  migration

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