Egg Color and Markings: These bright little birds lay rather plain eggs, largely white or bluish-white with some faint brown ...

Bird nesting happens in spring. That's common knowledge, right? Actually, it's not always the case. Even though we associate nesting birds with springtime, some birds do nest and lay eggs in other ...

Many species of birds are now building nests and laying eggs at a time of year their counterparts from a century ago would have considered outrageously early. Around a third of birds in the Upper ...

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 ...

A new study has uncovered a fundamental link between brain size and offspring size, helping to solve a long-standing evolutionary puzzle: Why do birds lay such disproportionately large eggs?