Columbiformes is an order of birds that includes doves and pigeons. These birds are characterized by their small to medium size, stout bodies, and short necks. They have a unique ability to produce a special type of milk, known as crop milk, to feed their young. Doves and pigeons are found worldwide, inhabiting a variety of environments, from urban areas to forests. They are known for their strong homing abilities, which allow them to return to their nests over long distances. This trait has made them popular in aviation and messenger roles throughout history.