This bird had brown wings, a speckled chest, and a patch of red feathers on its throat not unlike that of a rose-breasted grosbeak. A rose breasted grosbeak, Pheucticus ludovicianus. Photograph by ...

which had eggs with colorful and speckled shells. That’s according to a new study of fossil eggs in the journal Nature. Researchers found that birds’ close dinosaur relatives had eggs with traces of ...

Have you ever wondered why some birds' eggs are speckled? Scientists have long wondered ... But the reddish-brown speckles on eggs don't require calcium at all—they are made mostly from ...