A third of bird species in Chicago are laying their eggs a month earlier than they did 100 years ago, according to a new study that compares recent observations with data from century-old eggs.

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 ...

About a third of Chicago-area bird species are laying their eggs earlier than normal, a study recently published in the Journal of Animal Ecology found. Researchers believe the change in nesting is ...

CHICAGO — It’s springtime, and the birds are chirping as they begin to build their nests. Researchers say the hands-on clock is turning back, though it happens like clockwork each year. Many species ...

LONDON (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, according to ...

Find the answer for Egg-laying farm birds from the people who brought you the USA TODAY Daily Crossword Puzzle.

Desert birds lay larger eggs when they have more helpers to feed their chicks, new research shows. White-browed sparrow weavers live in family groups in which only a dominant pair breeds and their ...

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 ...

A critically-endangered bird is making a comeback on the Galapagos Islands. Experts from the Charles Darwin Foundation and the Galapagos National Park Directorate who formed part of The Mangrove Finch ...