Learn to identify bird eggs and discover how egg color ... Clutch size: 3 to 4 eggs The spotless, bright blue-green eggs in the American robin’s mud-lined nest are a sure sign that spring ...

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 ...

While you might be most familiar with “robin’s egg blue”, many species of birds lay blue-colored eggs. Why might this have evolved? Although scientists can’t go back in time to observe the emergence ...

Mockingbird eggs can be a pretty blue, too, but lighter and with brown speckles. Your general question, however, remains the same — is it common for birds to share nest duties, and the answer is ...

People have always wondered why many birds lay bright blue eggs. David Lahti of the City University of New York and Dan Ardia of Franklin & Marshall College tested the hypothesis that pigmentation ...

From chocolate brown to brick red, emerald green to turquoise blue, bird eggs come in an astonishing variety of colours. And it all began with one dinosaur alive tens of millions of years ago ...

While you might be most familiar with "robin's egg blue", many species of birds lay blue-colored eggs. Why might this have evolved? Although scientists can't go back in time to observe the emergence ...