blue eggs

Blue eggs are found in many modern birds and people have long believed that only the animals of the new bird family have green eggs.

Scientists at the University of Bonn in Germany examined the 66-million-year-old egg of the dinosaur feather called Heyuannia huangi and discovered the pigment in the green fossil.

A bird's egg in Central and South America has a natural iridescent shell, with color changing from different angles.