The Phenomenon of Double-Yolk Eggs, Meaning, and Curiosities

Another curiosity about eggs is that they can have various shapes depending on the bird species. Birds that nest on rocky cliffs lay elongated eggs, while those that nest in cavities lay more rounded ones. Magpies lay pear-shaped eggs, while birds with slender bodies lay more elliptical-shaped eggs. According to various scientific studies, the environment and nesting habits influence the shape of eggs.