Columbiformes: pigeons, doves and their relatives

Key characteristics

Members of the order share a set of physical and behavioral traits that make them recognizable:

• Stocky bodies with relatively small heads and short necks.
• Anisodactyl feet (three toes forward, one back) and unwebbed toes adapted to perching and walking.
• Strong, often fast flight muscles and wings suited to sustained flight rather than hovering.
• Crop milk produced in the crop lining to nourish nestlings, a rare adaptation among birds.
• Tendency to lay one or two relatively large, altricial (dependent) chicks per brood.

Evolution and classification

Columbiformes have a fossil record extending into the Paleogene, and molecular studies place them among the early-diverging groups of modern land birds. Most authorities confine the living diversity to the single family Columbidae, though historically other groups such as sandgrouse were sometimes associated and are now treated separately. Famous extinct members of the family include island giants such as the dodo and the Rodrigues solitaire, which illustrate how isolation can produce large, flightless forms from pigeon ancestors.

Ecology, behavior and examples

Pigeons and doves occupy a wide range of habitats from forests and grasslands to urban centers. Diets tend toward seeds and fruit, making many species important seed dispersers; some feed on insects or other small items. They typically build simple platform nests and both parents share incubation and feeding duties. Well-known species include the rock pigeon (Columba livia), the mourning dove, and larger wood pigeons; the passenger pigeon, once extraordinarily numerous in North America, became extinct in the early 20th century as a consequence of hunting and habitat loss.

Human interactions and conservation

Columbiformes have long been tied to human culture: rock pigeons were domesticated for food and messaging, and doves serve as symbols in many traditions. Several species adapt readily to human environments and thrive as feral populations, while many island endemics and habitat specialists face threats from habitat destruction, introduced predators, and hunting. Conservation efforts range from habitat protection to captive-breeding programs for the most endangered taxa. For further general information on these birds, see resources about pigeons and doves.