It’s a mesmerizing sight: Thousands of birds move in unison through the evening sky, whirling and swooping as if performing a highly synchronized ballet. When they finally descend to their treetop ...

A man has befriended a flock of pigeons by feeding them so now when he walks into the park they immediately swarm him. The filmer said: "This video was filmed in south London, UK, where I’ve built a ...

Humans are not the only species that deliberate in groups to reach decisions; schools of fish, flocks of birds, and swarms of bees can reach rapid decisions about life-or-death issues before finding ...