In a robin couple, a male brings his female partner nesting material as she constructs the robins’ nest. The female builds the cup-like nest with mud as its foundation and lines it with grasses, twigs ...

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 ...

European starlings, an invasive species in the U.S., lay blue eggs often mistaken for those of bluebirds or robins. Unlike native birds, starlings outcompete local species and are not protected by law ...

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 ...

A classic blue egg layer, the American Robin’s sky-blue eggs are among the most recognised in North America. The Common Blackbird lays beautiful blue-green eggs with red-brown markings, typically ...

The Auk: Ornithological Advances aims to advance fundamental scientific knowledge by increasing the basic knowledge of bird species, both living and extinct, and the knowledge of broad biological ...

Brood parasites like the cuckoo lay eggs in other species' nests to avoid parenting duties. Birds like the Asian Koel have evolved eggs that perfectly mimic their host's eggs. Cuckoo and honeyguide ...