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 ...

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 ...

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 ...

A new study shows the outward appearance of female barn swallows, specifically the hue of their chestnut-colored breast feathers, has an influence on their physiological health. A new study conducted ...

BOULDER, Colorado – North American barn swallows, which are widespread throughout Colorado, outperform their peers in reproduction by maintaining a positive balance of antioxidants, according to a new ...

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 ...

The most wide-spread members of the swallow family, barn swallows wing their way throughout the world, breeding generally in the Northern Hemisphere and wintering throughout most of the Southern ...

Barn swallows live almost everywhere on the planet, recognizable by their forked tail and agility in the air. Yet while they share these characteristics, these little birds often look slightly ...

May is one of my favorite months of the year. Every walk outside is an adventure with something new to discover. One returning visitor excites me more than any other I see: barn swallows. They are ...