The number of eggs a bird lays — its clutch size — varies greatly among species. You might think every species should simply lay lots of eggs because that would increase the odds of more young birds ...

Fork-tailed drongos have a signature color and pattern on their eggs, which helps them avoid getting duped by African cuckoos. Hans Stieglitz via Wikimedia Commons under CC BY-SA 3.0 Cuckoos have ...

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 ...

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, ...

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 ...