There are 280-295 species the whole world over. Most of them live in Asia, Australia- there are some beautiful species. Some grow to the size of a sparrow, the other to the size of a turkey. They have thick and fat feathering, proportional small head. They have rare phenomenon that is related to reproduction. Their head substitutes crop milk, with which parents feed their children in the very first days of life. This liquid has high protein and fat content and smells like cheese. Lots of pigeons spend almost whole of their life on the trees and eat seed, fruit and buds.
Pigeons have a distinctive sense of orientation, which was recognised and people made use of BACK
carrier pigeons.