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 ...

Every autumn, billions of birds leave their breeding areas when the temperature drops and food gets scarce to spend the winter in more favorable climes, returning the following spring when warm ...

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 ...

Believe it or not, fall migration is already underway. But it’s a harrowing journey back north for the hundreds of bird species that will fly through Wisconsin. Window collisions are a leading cause ...

Argentavis magnificens was so massive it should’ve stayed grounded. Yet, this giant prehistoric bird still ruled the skies of ancient Argentina.

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 ...