Eggs are fragile spheriods used by birds to enclose a developing embryo. Supposedly, eggs are spheroidal (meaning a 3-D oval) in order to keep them from easily rolling out of a nest like a spherical structure would. Eggs may be black, white, blue, gray, speckled, mottled, a combination of these, or many other types.
The reproductive body produced by the female of certain animals, birds, reptiles and fish. They consist of albumen, jelly, membranes and an egg case or shell depending on the species.