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 ...

Across the Northern Hemisphere, satellite tags and backyard observations are revealing a surprising pattern: some birds are not just drifting off course, they are consistently flying in the opposite ...

CU Boulder researchers challenge long-held assumptions about the relationship between bird migration and the process by which new species arise Every year, billions of birds take to the skies, riding ...

Each year, birds set out on their annual spring migration, traveling to their summer feeding grounds. This time of year is when local birds that went south for the winter return, or when birds that ...

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 ...

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, ...