The dark, smudgy streaks on Xavi Bou's photographs suggest the jerky ink tracks created by a malfunctioning printer, but they actually record the various patterns birds trace while flying in flocks.

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Most birds fly at low altitudes, relatively speaking. But ...

A shape-shifting flock of thousands of starlings, called a murmuration, is amazing to see. As many as 750,000 birds join together in flight. The birds spread out and come together. The flock splits ...

BND photojournalist Derik Holtmann recently captured images of a huge flock of birds flying in unison before sunset near Illinois 4 in Mascoutah. A gigantic flock of birds is a familiar site around ...

Large clusters appearing on weather radars are likely massive flocks of migrating birds, not storms. A record-breaking 1.2 billion birds were estimated to be migrating in a single night during the ...

As late summer fades into autumn, Indiana’s skies transform into a living highway. Billions of birds begin their fall migration, heading south on a journey that spans hundreds — or even thousands — of ...