A vagrant Blackpoll Warbler is seen on Southeast Farallon Island in California. On a 2009 hike in the Huachuca Mountains of southeastern Arizona, a group of birders heard an otherworldly ethereal bird ...
Red backed shrikes migrate using a fixed schedule, flying in stages with little variation, showing that genetics guide bird migration.
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Millions of birds fly 'highways' across US—and their migration routes are breaking down
Every fall, the skies of the northeastern United States fill with warblers, barn swallows and other birds heading south to warmer climates. The journeys are long—often spanning continents—and birds ...
Mystery of migration -- Advantages of migration -- Origin of migration: Northern ancestral home theory -- Southern ancestral home theory -- Theory of photoperiodism -- Theory of continental drift -- ...
On a 2009 hike in the Huachuca Mountains of southeastern Arizona, a group of birders heard an otherworldly, ethereal bird song floating, flute-like, through the canyon. The hikers identified the ...
Wood-pewees migrate from places like Upstate New York to spend their winters in Central America and northern South America. Every fall, the skies of the northeastern United States fill with warblers, ...
On a 2009 hike in the Huachuca Mountains of southeastern Arizona, a group of birders heard an otherworldly ethereal bird song floating, flute-like, through the canyon. The hikers identified the singer ...
A Blackpoll Warbler on Southeast Farallon Island in California is one example of the many birds that wind up as vagrants - well outside their normal range. A new study from the University of Illinois, ...
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