So what causes different egg colors among the same type of bird? Dr. Justin Fowler (which came first, the surname or the ...

The color, size, and pattern of a bird’s eggs is often unique to its species, and there’s online tools and even entire books dedicated to classifying bird eggs so that bird watchers can easily ...

Learn how to identify bird eggs by color and size. One of the most interesting bird egg facts that despite the broad variety in colors and markings displayed by bird eggs, just two pigments are ...

Brood parasitic birds lay their eggs in the nests of others ... Hosts may discriminate nestlings using cues such as size, color, vocalization, and overall clutch size. Mouth coloration and ...