Birds have evolved to fit particular environments. Eggs have evolved along with the birds. The eggs that birds will lay this spring will vary in shape and color to facilitate successful hatching in a ...

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.

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 (AP) — Many species of birds are nesting and laying eggs nearly a month earlier than they did 100 years ago in the Chicago area and researchers believe climate change is behind it. Those were ...

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 ...

Southeast area residents of Woodland residents may be fighting a losing battle against those “no-see-ems” swarming out of the Yolo Bypass this time of year. But the birds which feed in part on the ...

Q. Do brown-headed cowbirds select the nest of another bird to lay eggs in based on which species raised them as a nestling? In other words, if a cowbird is raised as a chick by a red-winged blackbird ...

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 ...

Of all the vertebrates on Earth—that is, animals with backbones—birds are the only ones that lay colorful eggs. Scientists are still unsure why, but new research brings us a step closer to finding out ...

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 ...