Pigeon biset

En bref

  • Scientific Name: Columba livia
  • Spanish Name: Paloma bravía
  • Family: Columbidae
  • Known Nicknames: Rock Dove, City Pigeon, Street Pigeon
  • Average Length: 29–37 cm / 11–15 in
  • Average Weight: 238–380 g / 8.4–13.4 oz
  • Wingspan: 62–72 cm / 24–28 in
  • Key Feature: Iridescent neck patches and two dark wing bars
  • Primary Diet: Primarily Granivore
  • Range: Native to Europe, North Africa, and western Asia; introduced worldwide
  • Habitat: Urban areas, cliffs, and rocky ledges
  • Structure sociale : Très sociable
  • Nesting/Breeding: Ledges on buildings, cliffs, or bridges
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : En hausse

The Rock Pigeon (*Columba livia*), the familiar urban dweller often called a pigeon, is a master of adaptation with a striking dual identity. Its general appearance includes a stout, gray body with iridescent green and purple patches on the neck, two dark wing bars, and a white rump, though feral populations display a kaleidoscope of colors from pure white to rusty brown. A unique characteristic is its remarkable homing ability, driven by an internal magnetic compass and visual landmarks, which has been harnessed for centuries in message delivery. Special features include its distinctive head-bobbing gait, which stabilizes its vision, and its ability to drink water by sucking it up continuously, unlike most birds that tilt their heads back.

Faits amusants

Rock pigeons can navigate using the Earth’s magnetic field thanks to iron-containing structures in their beaks, and they also use the sun’s position as a compass. They are one of the few bird species that can drink water without tilting their heads back, instead sucking it up like a straw. Their unique “head-bobbing” walk is actually a stabilizing mechanism—their head stays perfectly still in space while their body moves forward, allowing them to process visual information in stop-motion. These birds also produce “crop milk,” a nutrient-rich secretion from their throat lining, which both parents feed to their chicks, making them one of the few non-mammals to lactate.

Habitats et répartition

The Rock Pigeon is highly adaptable and thrives in a wide variety of environments, but it is most abundant in urban and suburban areas. Its natural habitat consists of steep, rocky cliffs and sea caves, but it has successfully colonized human-made structures such as bridges, ledges, barns, and skyscrapers, which closely mimic its ancestral nesting sites. This species is found on every continent except Antarctica, with a native range spanning Europe, North Africa, and parts of Asia. Through introduction and feral populations, it now occupies most of the world's temperate and tropical regions, including North and South America, Australia, and many oceanic islands, typically avoiding only dense forests and extreme deserts.

Comportements & Reproduction

Rock pigeons are highly social, forming large, stable flocks with a loose dominance hierarchy, often centered around a specific roost or feeding site. Their mating system is primarily monogamous, with pairs forming strong, often lifelong bonds. Courtship involves the male puffing up his neck feathers, bowing, and cooing while turning in a circle, a display that culminates in mutual preening and billing. The nest is a flimsy platform of twigs and debris, typically built on ledges, cliffs, or human structures. A unique reproductive strategy is their ability to breed year-round in favorable conditions, producing multiple broods. The female usually lays two white eggs, and both parents share incubation duties for about 18 days. The young, called squabs, are fed a nutrient-rich secretion called "crop milk" produced by both parents, which allows for rapid growth and independence within 30 days.

Alimentation

The Rock Pigeon is primarily granivorous, with its diet consisting mainly of seeds, grains, and cereal crops such as wheat, corn, barley, and rice, which they often forage from agricultural fields, urban parks, and city streets. They are highly adaptable and will readily supplement this with small amounts of berries, green shoots, and occasionally invertebrates like earthworms or snails, especially during breeding season when chicks require more protein. An interesting fact about their diet is that pigeons are one of the few bird species that can drink water by sucking it up continuously, unlike most birds that must tilt their heads back to swallow, allowing them to hydrate efficiently at puddles or birdbaths. Additionally, they possess a unique digestive adaptation: a specialized crop that produces a nutrient-rich substance called "crop milk" (similar to mammalian milk) to feed their young, which is regurgitated directly into the squabs' mouths.

Couleurs

The Rock Pigeon typically displays a slate-gray body with two prominent dark wing bars, an iridescent green and purple sheen on the neck, and a white rump. Unique color variations include pure white, brown, or checkered patterns, while its adaptation for camouflage is a subtle gradation from a darker head to a lighter belly, blending against urban stone and sky.