Beauty is in the eye of the beholder—even if that beholder is a barn swallow. Depending on where the birds live, some of them may favor mates with a paler chest color while others find a redder chest ...

If you are a male barn swallow in the United States or the Mediterranean with dark red breast feathers, you’re apt to wow potential mates. But if you have long outer tail feathers in the United States ...

In the world of birds, where fancy can be as fleeting as flight, the color of the bird apparently has a profound effect on more than just its image. A new study of barn swallows reveals it also ...

Even after they have paired with a male, the female North American barn swallow still comparison-shops for sexual partners. And forget personality, the females judge males by their looks: the reddish ...

A new study led by the University of Colorado at Boulder has shown the testosterone of male North American barn swallows skyrocketed early in the breeding season when their breast colors were ...

ITHACA, N.Y. -- Even after they have paired with a male, the female North American barn swallow still comparison-shops for sexual partners. And forget personality; the females judge males by their ...