Blue-and-green jay hybrid is turning heads in San Antonio, Texas, after weather-driven habitat shifts brought 2 species together in same patch of sky.

A global study reveals sexual selection influences life expectancy differences between sexes in mammals and birds, reshaping aging research and public health.

In nature, the female bird chooses. And the male bird … he earns it. That’s why boy birds are prettier. They dance. They sing. They flaunt their feathers. The girl bird watches and picks the one who ...

Across 1,000 species, males die younger than females—even in zoos. A global study shows biology, not just lifestyle, drives sex differences in lifespan.

A riverside tract that includes wetlands, forest and colorful native plants also attracts a sky full of birds. Bird enthusiasts found that out at the invitation of the Watershed Conservation Resource ...

The last pair — a breeding male and female — were killed by hunters in 1844 while defending their egg, researchers said.

A new analytical method is revealing how conservationists can further boost breeding programs dedicated to saving some of the world's most threatened species, according to new research led by the ...

Sexual behavior is one reason why female mammals typically live longer than their male counterparts, according to a new study.

"If it had gone two houses down, probably it would have never been reported anywhere." Experts stunned after capturing unusual hybrid bird: 'I don't know what it was' first appeared on The Cool Down.

"Who Has the Most Beautiful Mane in the Land?" – A magnificent coat may help lions attract mates, but it likely costs them years of life. Photo: Getty Images Peacock males display their magnificent ...

On Thursday September 18, about 40 people gathered on Wood Street, faces lifted to the sky. For 45 minutes, thousands of migrating chimney swifts spiraled above the old J.W. Hallahan High just north ...