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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

Long-Distance Migration Takes Fuel and Water

Long-distance migration can be hard on a bird’s body. For example, this Swainson’s Thrush might migrate between northern Canada and South America, twice a year. In the weeks before such a long journey and during key stopovers en route, the thrush eats like crazy to put on fat. But during the... read more »

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Topics & Themes:  ecology, migration

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

Late Fall Sounds to Listen For

By the time November rolls around, the bird songs of summer can seem a distant memory.But there’s always something to listen for. Small birds like chickadees and kinglets, including the Golden-crowned Kinglet pictured here, often mix in flocks while foraging. Geese can be heard overhead in the... read more »

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Red Knot Migration

Thanks to radio transmitters, scientists have vastly increased their knowledge of Red Knot migration patterns. For example, the vast majority of Red Knots on the Pacific Coast rely on a small number of places to rest and feed during spring migration from Mexico to the Arctic. Those locations... read more »

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Topics & Themes:  migration

North with the Spring - Migration

American naturalist Bruce Beehler — inspired by Edwin Way Teale's similar journey in 1947 — is following the spring songbird migration to build greater appreciation for birds. In partnership with American Bird Conservancy, Beehler is traveling from the Gulf of Mexico to the boreal forest of... read more »

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Topics & Themes:  environmental champion, migration

Waterfowl Migration in Flux

Waterfowl such as this Greater White-fronted Goose have long followed a predictable schedule, flying south in autumn after breeding in the north. But for some birds, climate change may be delaying fall migration. Beginning in 1979, scientists in northern Europe recorded migration dates of geese... read more »

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Topics & Themes:  migration

The Demise of the Passenger Pigeon

On September 1, 1914, Martha, the last known Passenger Pigeon, died in the Cincinnati Zoo. It’s hard to believe there were billions of Passenger Pigeons in the early nineteenth century.By 1900, there were none left in the wild. The last Passenger Pigeon became a symbol of how easily we can... read more »

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Topics & Themes:  ecology, migration, ornithology, science

Nighttime Flights of Songbirds

Some cloudless night in September, when the air is clear, you may see birds flying across the yellow face of the moon! September is peak migration time for millions of songbirds heading south from North America to more tropical latitudes. Nocturnal migrants of the same species, such as orioles,... read more »

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Topics & Themes:  migration, vocalization

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