The only existing in nature egg-shaped object - this egg

And that is why this form is takaya



From the geometric point of view, form the majority of birds' eggs closest to prolate ellipsoid, but one end of the egg, as a rule, more or less narrowed, so the exact name of such facilities should be something like "asymmetric conical ellipsoid." What nature has endowed birds' eggs as a specific form?

The reasons should be sought in the evolution of birds eggs in the form of a sphere or ellipsoid right can easily roll out of the nest, while the asymmetric moving along a spiral trajectory and are less prone to this danger.

Oology (specialists who study birds' eggs) have long noticed that the birds nesting in trees or rocks, the asymmetry of the eggs is stronger: arisen in the course of evolution, genetic mutations provide this feature, increased the survival of species, so they gradually became the dominant hereditary traits. Birds of breeding in holes and burrows, lay eggs almost perfectly spherical shape - they are such tricks to anything.

According to scientists, the irregular shape of the eggs also allows them to be placed in a nest close to each other and thus better retain heat, in addition to this 'pointy' eggs facilitate the birth process in birds - a narrowed portion of a quick exit from the cloaca (the final part of the hindgut) and decreases the risk of muscle strain.

via factroom.ru