![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Chicken_egg_diagram.svg/640px-Chicken_egg_diagram.svg.png&w=640&q=50)
Bird egg
Component of avian reproduction / From Wikipedia, the free encyclopedia
Bird eggs are laid by the females and range in quantity from one (as in condors) to up to seventeen (the grey partridge). Clutch size may vary latitudinally within a species. Some birds lay eggs even when the eggs have not been fertilized; it is not uncommon for pet owners to find their lone bird nesting on a clutch of infertile eggs, which are sometimes called wind-eggs.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Chicken_egg_diagram.svg/640px-Chicken_egg_diagram.svg.png)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/35/Eggs%2C_trinity_zoo_museum.jpg/640px-Eggs%2C_trinity_zoo_museum.jpg)