Related topics: birds

Carrier Pigeon Faster Than Broadband Internet

(PhysOrg.com) -- In South Africa, a carrier pigeon carrying a 4GB memory stick proved to be faster than the ADSL service from the country's biggest web firm, Telkom. Winston the pigeon took one hour and eight minutes to carry ...

Physicists discuss quantum pigeonhole principle

The pigeonhole principle: "If you put three pigeons in two pigeonholes at least two of the pigeons end up in the same hole." So where's the argument? Physicists say there is an important argument. While the principle captures ...

The ethics of resurrecting extinct species

(Phys.org) —At some point, scientists may be able to bring back extinct animals, and perhaps early humans, raising questions of ethics and environmental disruption.

Pigeons never forget a face

New research has shown that feral, untrained pigeons can recognise individual people and are not fooled by a change of clothes.

Pigeons can discriminate both space and time

Pigeons aren't so bird-brained after all. New research at the University of Iowa shows that pigeons can discriminate the abstract concepts of space and time—and seem to use a different region of the brain than humans and ...

Biologists experimentally trigger adaptive radiation

When naturalist Charles Darwin stepped onto the Galapagos Islands in 1835, he encountered a bird that sparked a revolutionary theory on how new species originate. From island to island, finches had wildly varied beak designs ...

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Columbidae

Pigeons and doves constitute the bird family Columbidae within the order Columbiformes, which include some 300 species of near passerines. In general terms "dove" and "pigeon" are used somewhat interchangeably. In ornithological practice, there is a tendency for "dove" to be used for smaller species and "pigeon" for larger ones, but this is in no way consistently applied, and historically the common names for these birds involve a great deal of variation between the terms "dove" and "pigeon." This family occurs worldwide, but the greatest variety is in the Indomalaya and Australasia ecozones. Young doves and pigeons are called "squabs."

Pigeons and doves are stout-bodied birds with short necks, and have short slender bills with a fleshy cere. The species commonly referred to just as "pigeon" is the Feral Rock Pigeon, common in many cities.

Doves and pigeons build relatively flimsy nests from sticks and other debris, which may be placed in trees, on ledges or on the ground, depending on species. They lay one or two eggs, and both parents care for the young, which leave the nest after 7 to 28 days. Doves feed on seeds, fruit and plants. Unlike most other birds (but see flamingo), the doves and pigeons produce "crop milk", which is secreted by a sloughing of fluid-filled cells from the lining of the crop. Both sexes produce this highly nutritious substance to feed to the young.

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