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 ...

In spring, birds turn into busy builders. They gather grass blades, bark strips, twigs, feathers, string, even mud, which they use to create structures to hold their eggs. Their nests, ranging from ...

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Just as humans are usually left- or right-handed, other species sometimes prefer one appendage, or eye, over the other. A new study reveals that American robins that preferentially use one eye ...

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 ...