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

2009). Tetrachromats are theoretically able to see twice as many colors as trichromats (e.g., humans). For example, two eggs might appear indistinguishable to us, but a bird might see them ...

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 ...

Eastern Bluebird: Similar to the American Robin, Eastern Bluebirds lay bright blue eggs that are quite striking. Bowerbird: Males of this species collect colorful objects to attract females, and their ...