Birds have evolved to fit particular environments. Eggs have evolved along with the birds. The eggs that birds will lay this spring will vary in shape and color to facilitate successful hatching in a ...

As we enter summer and more people are looking at raising backyard chickens, they may be curious why chicken eggs can be different colors. Most eggs are white or brown, but they also come in other ...

A classic blue egg layer, the American Robin’s sky-blue eggs are among the most recognised in North America. The Common Blackbird lays beautiful blue-green eggs with red-brown markings, typically ...

Many species of the opisthobranch mollusk Aplysia form breeding aggregations during the reproductive season. The aggregations contain both mating and egg-laying animals, and are associated with egg ...

A classic blue egg layer, the American Robin’s sky-blue eggs are among the most recognised in North America. The Common Blackbird lays beautiful blue-green eggs with red-brown markings, typically ...