What bird lays blue eggs? What do chickadee eggs look like? Look at photos to help you identify bird eggs from 10 different species.

Avians are more intelligent than you ever thought, they use colour to identify the eggs of 'parasite' birds, such as cuckoos, from their own and eject them from their nests, a new study has revealed.

Stevens and his colleague Claire Spottiswoode noticed the change in color when comparing prinia eggs in the wild in Zambia and some 40-year-old specimens from a nearby museum.

Why are bird eggs different colors? According to Dr. Curt Stager most of them start out white. Colors come later in development. Glands in the oviduct deposit color onto the eggs as they pass ...

Why are some bird eggs so colorful? Blame an evolutionary arms race Competition between brood parasites and their hosts drives multi-color egg adaptations ...

Bird eggs laid in cold climates are darker, which may keep eggs warm A global survey of bird egg color reveals a simple trend: the colder the climate, the darker the egg ...

How These Birds Can Spot Look-Alike ‘Imposter’ Eggs in Their Nests Fork-tailed drongos can identify and reject egg forgeries, laid by African cuckoos, with nearly 94 percent accuracy, new ...

Bird eggs get their color from two pigments: a red-brown pigment called protoporphyrin, which creates speckles and is found only in an eggshell’s soft, outer cuticle layer; and a blue-green ...

Depending on the species, bird eggs can be any color ranging from chicken's plain white to a robin's blue, streaked, spotted, bright, pale, and anything in between. Today, on a Moment of Science ...

A years-long research debate over which animal is the rightful mother of giant prehistoric eggs in Australia has been resolved. In a new study, University of Copenhagen researchers and their ...

The eggs laid by two African bird species have evolved different color patterns over a period of just 40 years, according to new research. The quick change appears to be driven by an unwanted ...