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 can’t regularly visit Seattle’s Woodland Park Zoo, check out the roving animal cam. The zoo features a new animal or exhibit angle every week. A family of North American barn swallows in their ...

A new study indicates North American barn swallows outperform their peers in reproduction -- the "currency" of evolutionary change -- by maintaining a positive balance of antioxidants commonly sold in ...

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 – 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 study ...

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 ...

Barn swallows are a cosmopolitan species, living in such far-flung places as Europe, the Middle East, Indochina and Australia, practically everywhere except some islands and the polar regions. I've ...

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 ...

One warm and muggy morning on my walk, I notice swallows gathering on overhead power lines. The pair closest to me are northern rough-wings, and they are well into the throes of courtship: she, ...

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 ...

You can't miss the flying acrobats - aka barn swallows - as you drive under overpasses. They began arriving in late March from winter homes in Central and South America. The majority probably made a ...