Birds of Birdland: The Pidgeon

The Rock Dove, or Pidgeon as we commonly know them, are very intelligent, brightly colored birds that many people have come to know throughout the world. Since they love buildings and city life, it isn't uncommon to find them in just about every city in America and many others around the world. Wild Rock Pidgeons are normally a pale grey with two black bars on each of their wings, but those that have been domesticated or bred with domesticated pidgeons can be found in all different colors and patterns.

Not sure what a "normal" Pidgeon looks like? There are several different distinctions between adults and young, male and female. The adult of the nominate subspecies of the Rock Pigeon is 32–37 cm (12–14½ in) long with a 64–72 cm (25–28 in) wingspan. It has a dark bluish-gray head, neck, and chest with glossy yellowish, greenish, and reddish-purple iridescence along its neck and wing feathers. The iris is orange, red or golden with a paler inner ring, and the bare skin round the eye is bluish-grey. The bill is grey-black with a conspicuous off-white cere, and the feet are purplish-red. The adult female is almost identical to the male, but the iridescence on the neck is less intense and more restricted to the rear and sides, while that on the breast is often very obscure.

The white lower back of the pure Rock Pigeon is its best identification character, the two black bars on its pale grey wings are also distinctive. The tail has a black band on the end and the outer web of the tail feathers are margined with white. It is strong and quick on the wing, dashing out

from sea caves, flying low over the water, its lighter grey rump showing well from above. Young birds show little lustre and are duller. Eye colour of the pigeon is generally an orange colour but a few pigeons may have white-grey eyes. The eyelids are orange in colour and are encapsulated in a grey-white eye ring. The feet are red to pink.

When circling overhead, the white underwing of the bird becomes conspicuous. In its flight, behaviour, and voice, which is more of a dovecot coo than the phrase of the Wood Pigeon, it is a typical pigeon. Although it is a relatively strong flier, it also glides frequently, holding its wings in a very pronounced V shape as it does. Though fields are visited for grain and green food, it is nowhere so plentiful as to be a pest.

Pigeons feed on the ground in flocks or individually. They roost together in buildings or on walls or statues. When drinking, most birds take small sips and tilt their heads backwards to swallow the water. Pigeons are able to dip their bills into the water and drink continuously without having to tilt their heads back. When disturbed, a pigeon in a group will take off with a noisy clapping sound. Homing pigeons, are well known for their ability to find their way home from long distances. Despite these demonstrated abilities, wild Rock Pigeons are sedentary and rarely leave their local areas.

Of course while the Pidgeon is seen throughout cities all over the world, their habitats nclude various open and semi-open environments, including agricultural and urban areas. Cliffs and rock ledges are used for roosting and breeding in the wild. Originally found wild in Europe, North Africa, and western Asia, feral Rock Pigeons have become established in cities around the world. The species is abundant, with an estimated population of 17 to 28 million feral and wild birds in Europe.

Pigeons may harbour a diverse parasite fauna.[18] They often host the intestinal helminths Capillaria columbae and Ascaridia columbae. Their ectoparasites include the Ischnoceran lice Columbicola columbae, Campanulotes bidentatus compar, the Amblyceran lice Bonomiella columbae, Hohorstiella lata, Colpocephalum turbinatum, the mites Tinaminyssus melloi, Dermanyssus gallinae, Dermoglyphus columbae, Falculifer rostratus, and Diplaegidia columbae. The hippoboscid fly Pseudolynchia canariensis is a typical blood-sucking ectoparasite of pigeons, found only in (sub-)tropical regions.

Pigeons have been falsely associated with the spread of human diseases. Contact with pigeon droppings poses a minor risk of contracting histoplasmosis, cryptococcosis, and psittacosis. Pigeons are not a major concern in the spread of West Nile virus; though they can contract it, they do not appear to be able to transmit it. Pigeons are, however, at potential risk for carrying and spreading avian influenza. Although one study has shown that adult pigeons are not clinically susceptible to the most dangerous strain of avian influenza, the H5N1, other studies have presented definitive evidence of clinical signs and neurological lesions resulting from infection. Furthermore, it has been shown that pigeons are susceptible to other strains of avian influenza, such as the H7N7, from which at least one human fatality has been recorded.

Rock Pigeons have been domesticated for several thousand years, giving rise to the domestic pigeon (Columba livia domestica). As well as pets, domesticated pigeons are utilised as homing pigeons and carrier pigeons, and so-called war pigeons have served and played important roles during wartimes, with many pigeons having received bravery awards and medals for their services in saving hundreds of human lives: including, notably, the French pigeon Cher Ami who received the Croix de Guerre for his heroic actions during World War I, and the Irish Paddy and the American G.I. Joe, who both received the Dickin Medal, amongst 32 pigeons to receive this medallion, for their gallant and brave actions during World War II. There are numerous breeds of fancy pigeons of all sizes, colours and types.

Many domestic birds have escaped or been released over the years, and have given rise to the feral pigeon. These show a variety of plumages, although some have the blue barred pattern like the pure Rock Pigeon does. Feral pigeons are found in large numbers in cities and towns all over the world. The scarcity of the pure wild species is partly due to interbreeding with feral birds.