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

To identify common backyard bird eggs, you need to understand what makes the egg distinctive, including its size, shape, and color. Read more: Keep Birds Visiting Your Yard During Winter With A ...

Cuckoo finches are bad news to other birds ... colored eggs, perhaps to escape their pursuing parasite.” Stevens and his colleague Claire Spottiswoode noticed the change in color when comparing ...

That’s because fork-tailed drongos produce an individualized, very specific egg pattern and color combination called a signature—and this varies greatly from bird to bird. African cuckoos can ...

In spite of their diversity, bird eggs derive their color from just two pigments: protoporphyrin, which produces a reddish-brown color, and biliverdin, which creates blue and green. Last year ...

Fork-tailed drongos, belligerent birds from sub-Saharan Africa ... of their own personal egg "signatures"—their eggs' color and pattern –to identify cuckoo egg "forgeries" and reject them ...

Scientists are not entirely sure why birds lay such colorful eggs. Current theories fall into two main categories. The first is that color helps protect the eggs from environmental factors such as ...