When you buy through links on our articles, Future and its syndication partners may earn a commission. Circling vultures aren't waiting for an injured creature to die — they're riding currents, ...

Biologist Bracken Brown couldn’t believe his eyes when he spotted the seemingly out-of-place bird soaring through the sky. “I always enjoy doing roost counts, watching a column of vultures catch ...

High above fields, highways and suburbs, dark wings often trace slow circles over the same patch of ground, a sight that has long signaled trouble to anyone watching from below. Those spiraling birds ...