Why do birds lay blue eggs? Well, the blue color has biliverdin ... Most thrushes have gray or brown plumage with speckled feathers on their undersides. Thrush eggs are light blue or bluish ...

The same egg-coloring process holds true for all birds with colorful eggs ... can sport a blue hue, be speckled or feature brown streaks. Oh, but that egg-inside-an-egg story that made the ...