An experiment by evolutionary biologists offers new insights into birds’ brains. Three robin eggs in a nest, along with a double-pyramid imposter.Credit...M. Hauber Supported by By Veronique Greenwood ...

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 ...

HAZELWOOD, Mo. — It’s a lesson in patients and nurturing that happens every spring. Mother robins sit on their nest of eggs, waiting for their hatchlings in the circle of life. Now, you can get a bird ...

Dear Pet Talk: I don’t have pets but keep active birdfeeders, so all the birds are my “pets in the wild.” Why do robins lay blue eggs? — Bird Lover Dear Bird Lover: I concur with you about wild birds ...

Mallard ducks use their own feathers to insulate their nests. Hummingbirds lay small, white eggs approximately the size of jelly beans. Swiftlets build nests out of their saliva on cave walls and ...

In the spring, robins living on an Illinois tree farm sat on some unusual eggs. Alongside the customary brilliant blue ovoids they had laid were some unusually shaped objects. Although they had the ...