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.

Migratory birds change how high they fly over deserts and seas. Wing shape, feather color, and heat all play a role in helping them survive.

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 ...

A raptor flies on a clear day. As the weather gets chillier, birds are migrating, many crossing New Hampshire on their path to warmer climates. Hundreds of thousands of birds – warblers, tanagers, ...

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 ...