Spring is in the air. Birds are singing and beginning to build their nests. It happens every year, like clockwork. But a new study in the Journal of Animal Ecology shows that many species of birds are ...

Q. I saw a photo of different kinds of bird eggs and noted not only the obvious, that smaller birds lay smaller eggs, but also that some bird eggs are elongate whereas others are more rounded. What is ...

Egg-collecting enthusiasts in the late 1880s knew the hobby was crucial for understanding the natural world, but likely never imagined that their research would help scientists more than 100 years ...

LONDON, March 25 (Reuters) - The early bird is getting even earlier. With climate change spurring earlier springs across much of North America, many birds are laying their eggs earlier in the year, ...

Q. When we studied high school biology, our teacher said more than 99 percent of animals lay eggs and only a few give live birth. That percentage seems too high. Humans, dogs, cats and cows are ...

The birds were eliminated when the invasive brown treesnake was accidentally introduced to the island of Guam in the '40s.

PITTSBURGH (KDKA) - The eagle couple in Pittsburgh's Hays neighborhood is keeping two eggs warm and counting down to hatching later this month. Why do eagles jump the gun when most birds nest and lay ...