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 ...

Billions of periodical cicadas emerge every 13 or 17 years in the eastern United States, creating an all-you-can-eat buffet for birds. Chip Somodevilla / Getty Images When huge broods of cicadas ...

This spring’s emergence of periodical cicadas in the eastern U.S. will make more than a buzz. Their bodies—which will number in the billions—will also create an unparalleled food fest for legions of ...

It is spring in the northern hemisphere and birds initiate the remarkable architectural feat of building a home for the young. How is this accomplished? Hormones and Getting in the Mood Much of the ...