Dove & Pigeon

Pigeons or doves are the bird family Columbidae. The common names pigeon and dove are often used interchangeably. In ornithology, «dove» tends to be used for smaller species and «pigeon» for larger ones. The feral domestic pigeon is often called the «rock dove»: it is common in many cities.
There are more than 300 species in the family. They usually make nests of sticks, and their two white eggs are incubated by both the male and the female parent. Doves feed on seeds, fruit and plants.
Unlike most other birds, the doves and pigeons produce a type of milk. It is produced in their crop, and called crop milk. Both sexes have this highly nutritious milk to feed their young.