Rock dove#Taxonomy and naming

{{Short description|Ancestor of domestic pigeon}}

{{Redirect|Rock pigeon}}

{{EngvarB|date = May 2016}}

{{About|the ancestral wild form of domestic pigeons|the variable domestic form, with hundreds of breeds|Domestic pigeon|free-living descendants of domesticated birds living around human settlements|Feral pigeon}}

{{Speciesbox

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn | author = BirdLife International | title = Columba livia | page = e.T22690066A155493121 | year = 2019 | amends = 2016 | doi = 10.2305/IUCN.UK.2016-3.RLTS.T22690066A155493121.en | access-date = 19 February 2022 }}

| image = Columba livia Baltasound Shetland 1.jpg

| image_caption = Group of wild birds in Shetland, Scotland, with common starlings. The focal individual is performing a courtship display

| genus = Columba

| species = livia

| authority = Gmelin, JF, 1789{{cite web| editor1-last=Gill | editor1-first=Frank | editor1-link=Frank Gill (ornithologist) | editor2-last=Donsker | editor2-first=David | editor3-last=Rasmussen | editor3-first=Pamela | editor3-link=Pamela Rasmussen | date=January 2023 | title=Pigeons | work=IOC World Bird List Version 13.1 | url=https://www.worldbirdnames.org/bow/pigeons/ | publisher=International Ornithologists' Union | access-date=10 June 2023 }}

| range_map = Columba livia distribution map.png

| range_map_caption = {{leftlegend|#7E0308|approximate native range|outline=gray}}{{leftlegend|#FD8182|introduced non-native populations|outline=gray}}

}}

The rock dove (Columba livia), also sometimes known as "rock pigeon" or "common pigeon", is a member of the bird family Columbidae (doves and pigeons).{{cite book| last =Gibbs | first =David |author2=Eustace Barnes |author3=John Cox | title =Pigeons and Doves: A Guide to the Pigeons and Doves of the World | publisher =Pica Press | location =United Kingdom | url =https://books.google.com/books?id=r__Tx8QKQfMC | isbn =978-1-873403-60-0 | date =2010-06-30 }}{{rp|624}} In common usage, it is often simply referred to as the "pigeon", although the rock dove is the wild form of the bird; the pigeons familiar to most people are the domesticated forms of the wild rock dove.

Wild rock doves are uniformly pale grey with two black bars on each wing, with few differences being seen between males and females; i.e. they are not strongly sexually dimorphic. The domestic pigeon (often, but invalidly, called "Columba livia domestica"), which includes about 1,000 different breeds, is descended from this species. Escaped domestic pigeons are the origin of feral pigeons around the world. Both forms can vary widely in the colour and pattern of their plumage unlike their wild ancestor, being red, brown, checkered, uniformly coloured, or pied.{{cite book| last =Blechman | first =Andrew | title =Pigeons-The fascinating saga of the world's most revered and reviled bird. | publisher =University of Queensland Press | year =2007 | location =St Lucia, Queensland | url= http://andrewblechman.com/pigeons/learn_more.html |isbn =978-0-7022-3641-9 }}

Habitats include various open and semi-open environments where they are able to forage on the ground. Cliffs and rock ledges are used for roosting and breeding in the wild. Originating in Southern Europe, North Africa, and Western Asia, when including their domestic and feral descendants, they are an example of a least-concern species per IUCN among birds, being abundant with an estimated population of 17 to 28 million wild and feral birds in Europe alone and up to 120 million worldwide.{{cite web |url=https://www.allaboutbirds.org/guide/Rock_Pigeon/lifehistory |title=Rock Pigeon Life History |publisher=All About Birds, Cornell Lab of Ornithology |access-date=2019-12-24 |language=en}}

Taxonomy and systematics

File:Rock Dove.jpg, 1832]]

The official common name is rock dove, as given by the International Ornithological Congress.{{Cite report|date=2020|editor-last=Gill|editor-first=F.|title=IOC World Bird List v10.2|url=http://www.worldbirdnames.org/ioc-lists/crossref|language=en|publisher=International Ornithological Committee|doi=10.14344/ioc.ml.10.2|doi-access=free}}

The rock dove was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Systema Naturae written by Carl Linnaeus. He placed it with all the other doves and pigeons in the genus Columba and coined the binomial name Columba livia.{{ cite book | last=Gmelin | first=Johann Friedrich | author-link=Johann Friedrich Gmelin| year=1789 | title=Systema naturae per regna tria naturae : secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis | edition=13th | volume=1, Part 2 | language=Latin | location=Lipsiae [Leipzig] | publisher=Georg. Emanuel. Beer | page= | url=https://www.biodiversitylibrary.org/page/2656264 }} The genus name Columba is the Latin word meaning "pigeon, dove",James A. Jobling. Helm Dictionary of Scientific Bird Names. Bloomsbury Publishing p. 114 {{ISBN|1408125013}} whose older etymology comes from the Ancient Greek κόλυμβος (kólumbos), "a diver", hence κολυμβάω (kolumbáō), "dive, plunge headlong, swim".{{cite book | author = Liddell, Henry George | author-link = Henry George Liddell | author2 = Robert Scott | author2-link = Robert Scott (philologist) | name-list-style = amp | year = 1980 | title = A Greek-English Lexicon | publisher = Oxford University Press | location = United Kingdom | isbn = 0-19-910207-4 | url-access = registration | url = https://archive.org/details/lexicon00lidd | edition = Abridged }} Aristophanes (Birds 304) and others use the word κολυμβίς (kolumbís), "diver", for the name of the bird, because of its swimming motion in the air.{{cite book | last = Simpson | first = D. P. | title = Cassell's Latin Dictionary | publisher = Cassell Ltd. | year = 1979 | edition = 5th | location = London | page = 883 | isbn = 0-304-52257-0}} The specific epithet livia is a Medieval Latin variant of livida, "livid, bluish-grey"; this was Theodorus Gaza's translation of Greek péleia, "dove", itself thought to be derived from pellós, "dark-coloured".{{Cite book|last=Jobling|first=J.|url=https://pdfs.semanticscholar.org/988d/fc3214992239564844cc8fa92d4ff5d7ddd6.pdf|title=Helm Dictionary of Scientific Bird Names|publisher=Christopher Helm|year=2010|isbn=978-1-408-12501-4|location=London|access-date=August 20, 2019|archive-url=https://web.archive.org/web/20190815182030/https://pdfs.semanticscholar.org/988d/fc3214992239564844cc8fa92d4ff5d7ddd6.pdf|archive-date=August 15, 2019|url-status=dead|s2cid=82496461}}{{Rp|228}}

No original material was designated by Gmelin in his description of the species, and consequently a neotype specimen, from Fair Isle in Scotland, has been designated to define the species and its nominate subspecies C. l. livia.{{cite journal | last =Donegan | first =Thomas M. |date=2016 | title=The pigeon names Columba livia, ‘C. domestica’ and C. oenas and their type specimens. | journal=Bulletin of the British Ornithologists' Club |volume=136 |pages=14–27 | url=https://boc-online.org/bulletins/downloads/BBOC1361-Donegan.pdf | access-date=2025-03-22}}

Its closest relative in the genus Columba is the hill pigeon, followed by the snow, speckled, and white-collared pigeons. Pigeon chicks are called "squabs". Note that members of the pigeon genus Petrophassa and the speckled pigeon (Columba guinea), also have the common name "rock pigeon".

= Subspecies =

Nine subspecies are recognised:

Description

{{Multiple image

| image1 = Columba livia - 01.jpg

| caption1 = A distinctive cere or operculum is located on top of the beak.

| image2 = Rock pigeon in Chandigarh.jpg

| caption2 = The iridescence wraps around the entire neck.

| width = 200

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Centuries of domestication have greatly altered the rock dove. Domestic and Feral pigeons, which did not originate naturally, have significant variations in plumage. When not specified, descriptions are for assumed wild type, though the wild type may be on the verge of extinction or already extinct,{{Cite book|last=Gilbert|first=Thomas|url=http://link.springer.com/10.1007/978-1-4419-0465-2|chapter=Pigeons, Domestication of|date=2014|title=Encyclopedia of Global Archaeology|publisher=Springer New York|isbn=978-1-4419-0426-3|editor-last=Smith|editor-first=Claire|location=New York, NY|language=en|doi=10.1007/978-1-4419-0465-2|s2cid=220616743 }} and most research does not distinguish wild birds and descendants of domestic populations.

The adult of the nominate subspecies of the rock dove is {{convert|29|to|37|cm|in|abbr=on}} long with a {{convert|62|to|72|cm|in|abbr=on}} wingspan.{{cite web|last=Jahan |first=Shah |title=Feral Pigeon |publisher=The Birds I Saw |url=http://www.birdsisaw.com/bis/bird.aspx?q=15 |access-date=2008-02-19 |url-status=dead |archive-url=https://web.archive.org/web/20080629210950/http://www.birdsisaw.com/bis/bird.aspx?q=15 |archive-date=June 29, 2008 }} Weight for wild or feral rock doves ranges from {{Convert|238|-|380|g|abbr = on}}, though overfed domestic and semidomestic individuals can exceed normal weights. For standard measurements, the wing chord is typically around {{convert|22.3|cm|in|abbr=on}}, the tail is {{convert|9.5|to|11|cm|in|abbr=on}}, the bill is around {{convert|1.8|cm|in|abbr=on}}, and the tarsus is {{convert|2.6|to|3.5|cm|in|abbr=on}}.

This species has dark bluish-grey head, neck, and chest feathers with glossy yellowish,{{Citation needed|date=February 2025|reason=Example of yellow iridescence?}} greenish, and reddish-purple iridescence along its neck and wing feathers.{{Citation needed|date=February 2025|reason=Example of iridescent wing feathers?}} The white lower back of the pure rock dove is its best identification characteristic; 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.{{cite web| last=White |first=Helen |title=Rock Pigeons |publisher=Helen White |url=http://www.diamonddove.info/bird14%20Rock%20Dove.htm |website=www.diamonddove.info |access-date=2008-02-18}}{{self published inline|date=July 2019}}{{self published inline|date=July 2019}} The iris is orange, red, or golden with a paler inner ring, but a few pigeons may have white-grey eyes. The eyelids are orange and encapsulated in a bluish-grey to grey-white eye ring. The bill is grey-black with a conspicuous off-white cere. The feet are red to pink.

The adult female is almost identical in outward appearance to the male, but the iridescence on her neck is less intense and more restricted to the rear and sides, whereas that on the breast is often very obscure. Young birds show little lustre and are duller. Eye colour of the pigeon is generally orange, but a few pigeons may have white-grey eyes. The eyelids are orange and 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 Columba pigeon. Although it is a relatively strong flier, it also glides frequently, holding its wings in a very pronounced V shape as it does.{{cite web | last =Wright | first =Mike | title =Wildlife Profiles: Pigeon | publisher =Arkansas Urban Wildlife | url =http://www.arkansasurbanwildlife.com/wildlife/pigeon.aspx | access-date =2008-02-18 | archive-url =https://web.archive.org/web/20080610011112/http://www.arkansasurbanwildlife.com/wildlife/pigeon.aspx | archive-date =2008-06-10 | url-status =usurped }}

The various subspecies are similar to the nominate, but can be differentiated:{{rp|176–179}}

  • C. l. livia, the nominate subspecies, has mid-grey mantle plumage, and a relatively short tail.
  • C. l. gymnocycla is smaller and very much darker than the nominate. It is almost blackish on the head, rump and underparts with a white back and the iridescence of the nape extending onto the head.
  • C. l. targia is slightly smaller than the nominate, with similar plumage, but the back is concolorous with the mantle instead of white.
  • C. l. schimperi closely resembles C. l. targia, but has a distinctly paler mantle.
  • C. l. dakhlae is smaller and much paler than the nominate.
  • C. l. palaestinae is slightly larger than C. l. schimperi and has darker plumage.
  • C. l. gaddi is larger and paler than C. l. palaestinae, with which it intergrades in the west.
  • C. l. neglecta it is similar to the nominate in size but darker, with a stronger and more extensive iridescent sheen on the neck. It intergrades with C. l. gaddi in the south.
  • C. l. intermedia is similar to C. l. neglecta but darker, with a less contrasting back.

File:Columba livia 90.jpg, from Abbildungen von Vogel-Skeletten (1879)]]

There have been numerous skeletal descriptions of the rock dove and the associated muscles including those of the eye, jaw, neck, and throat.{{cite journal|doi=10.1186/s40851-019-0129-z|last2=Button|first2=David J.|last3=Barrett, P.M.|first3=Paul M|first4=Laura|last4=Porro B.|title=Digital dissection of the head of the rock dove (Columba livia) using contrast-enhanced computed tomography|journal=Zoological Letters|volume=5|pages=1–31|year=2019|last1=Jones|first1=Marc. E. H.|pmid=31205748 |pmc=6558907 |doi-access=free }} The skull is dominated by the rostrum, eye socket, and braincase. The quadrate bone is relatively small and mobile and connects the rest of the cranium to the lower jaw. The latter has an angled shape in lateral view because the long-axis of the front half of the lower jaw is at a 30° angle to the back half. Beneath the skull, the hyoid skeleton involves three mid-line structures and a pair of elongate structures that stem from between the junction of the back two structures. The anterior structure (the paraglossum or entoglossum) is unpaired and shaped like an arrowhead.

Pigeons feathers have two types of melanin (pigment) – eumelanin and pheomelanin. A study of melanin in the feathers of both wild rock and domestic pigeons, of different colour types and known genetic background, measured the concentration, distribution and proportions of eumelanin and pheomelanin and found that gene mutations affecting the distribution, amounts and proportions of pigments accounted for the greater variation of colour in domesticated birds than in their wild relations. Eumelanin generally causes grey or black colours, while pheomelanin results in a reddish-brown colour. Other shades of brown may be produced through different combinations and concentrations of the two colours.{{Cite journal|last1=Haase|first1=E|last2=Ito|first2=S|last3=Sell|first3=A|last4=Wakamatsu|first4=K|date=1992|title=Melanin Concentrations in Feathers from Wild and Domestic Pigeons|url=https://www.researchgate.net/publication/279259559|journal=Journal of Heredity|volume=83|pages=64–67|doi=10.1093/oxfordjournals.jhered.a111160}} Darker birds may be better able to store trace metals in their feathers due to their higher concentrations of melanin, which may help mitigate the negative effects of the metals, the concentrations of which are typically higher in urban areas.{{Cite journal|last1=Chatelain|first1=Marion|last2=Gasparini|first2=Julien|last3=Frantz|first3=A|date=2015|title=Do trace metals select for darker birds in urban areas? An experimental exposure to lead and zinc.|url=https://hal.sorbonne-universite.fr/hal-01311602/document|journal=Global Change Biology |volume=22|issue=7|pages=2380–91|doi=10.1111/gcb.13170|pmid=27282322|s2cid=27962528 }}

= Vocalisations =

The call is a soft, slightly wavering, coo. Ornithologist David Sibley describes the display call as a whoo, hoo-witoo-hoo,{{Cite book|last=Sibley, D.|title=The Sibley Guide to Birds|publisher=Alfred A. Knopf|year=2014|isbn=978-0-307-95790-0|edition=2nd|location=New York|page=201|oclc=869807502|author-link=David Allen Sibley}} whereas the Cornell Lab of Ornithology describes it as a Coo, roo-c'too-coo. Variations include an alarm call, a nest call, and noises made by juveniles.{{Cite journal|last1=Lowther|first1=Peter E.|last2=Johnston|first2=Richard F.|editor1-first=Shawn M|editor1-last=Billerman|date=March 2020|title=Rock Pigeon (Columba livia)|url=https://birdsoftheworld.org/bow/species/rocpig/cur/introduction|journal=Birds of the World|language=en|publisher=Cornell Lab of Ornithology|doi=10.2173/bow.rocpig.01|s2cid=216428981|url-access=subscription}} Sibley describes the nest call as a repeated hu-hu-hurrr. When displaying, songs are partly sexual, partly threatening. They are accompanied by an inflated throat, tail fanning, strutting, and bowing. The alarm call, given at sight of predators, is a grunt-like oorhh.

= Osmoregulation =

{{main article|Osmoregulation in rock doves}}

Distribution and habitat

File:Rock Doves, Alışıq, West Azerbaijan Province, Iran - panoramio (17).jpg nature]]

Before the Columbian Exchange, rock doves were restricted to a natural resident range in western and southern Europe, North Africa, and extending into South Asia. They were carried into the New World aboard European ships between 1603 and 1607.{{Cite journal|last=Schorger|first=A. W.|date=October 1952|title=Introduction of the Domestic Pigeon|journal=The Auk|volume=69|issue=4|pages=462–463|doi=10.2307/4081033|jstor=4081033|issn=0004-8038|doi-access=free}} The species (including feral birds) has a large range, with an estimated global extent of occurrence of {{Convert|10000000|km2|abbr= on}}. It has a large global population, including an estimated 17 to 28 million individuals in Europe. Fossil evidence suggests the rock dove originated in southern Asia, and skeletal remains, unearthed in Israel, confirm its existence there for at least 300,000 years. However, this species has such a long history with humans that it is impossible to identify its original range exactly.

Wild pigeons reside in rock formations and cliff faces, settling in crevices to nest. They nest communally, often forming large colonies of many hundreds of individuals.{{cite web|last=Kaufman|first=Kenn|date=November 2014|title=Guide to North American Birds: Rock Pigeon|url=https://www.audubon.org/field-guide/bird/rock-pigeon|access-date=2021-10-16|website=Audubon|publisher=National Audubon society|language=en}} Wild nesting sites include caves, canyons, and sea cliffs. They will even live in the Sahara so long as an area has rocks, water, and some plant matter. They prefer to avoid dense vegetation.

Feral pigeons are usually unable to find these accommodations, so they must nest on building ledges, walls or statues. They may damage these structures via their droppings; starving birds can only excrete urates, which over time corrodes masonry and metal. In contrast, a well-fed bird passes mostly solid faeces, containing only small amounts of uric acid.{{cite web |title=Dropping Interpretation |url=https://www.auspigeonco.com.au/dropping-interpretation.html |website=www.auspigeonco.com.au/ |publisher=Australian Pigeon Company |access-date=19 February 2025}}

Behaviour and ecology

File:Columba livia - Rock doves, Malatya 2018-09-29 03.jpg, Malatya]]

Pigeons are often found in pairs in the breeding season, but are often gregarious, living in flocks of 50 to 500 birds (dependent on the food supply).{{cite book|last1=Gibbs|first1=David|url=https://books.google.com/books?id=aeZXAAAACAAJ&q=Pigeons+and+Doves:+A+Guide+to+the+Pigeons+and+Doves+of+the+World|title=Pigeons and Doves: A Guide to the Pigeons and Doves of the World|last2=Barnes|first2=Eustace|last3=Cox|first3=John|publisher=Pica Press|year=2001|isbn=978-1-873403-60-0|location=United Kingdom|page=624}} As prey birds, they must keep their vigilance, and when disturbed a pigeon within a flock will take off with a noisy clapping sound that cues for other pigeons to take to flight. The noise of the take-off increases the faster a pigeon beats its wings, thus advertising the magnitude of a perceived threat to its flockmates.{{cite journal|doi=10.1016/0003-3472(75)90136-0|title=Socially induced flight reactions in pigeons|journal=Animal Behaviour|volume=23|pages=597–601|year=1975|last1=Davis|first1=J.Michael|s2cid=53171567}}{{Clarify|reason=Mention the mechanism behind this distinctive sound, such as feather anatomy and flight stroke|date=February 2025}}

Non-vocal sounds include a loud flapping noise at take-off, feet stamping, hisses, and beak snapping. Wings may also be clapped during flights, usually during display fights or after copulation. Juveniles particularly snap their bills, usually to respond to nest invasion. The foot stomping appears deliberate, though for what purpose is unclear. Foot stamping is done with a certain foot first, showing that rock doves have "footedness", similar to human handedness.

Homing pigeons, including carrier breeds, are well known for their ability to find their way home from long distances. Despite these demonstrated abilities, wild rock doves are sedentary and rarely leave their local areas. It is suggested that in their natural arid habitat, they rely on this sense to navigate back home after foraging as deserts rarely possess navigational landmarks that may be used.{{cite web | title =Rock Pigeon | publisher =Cornell Laboratory of Ornithology | url =http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Rock_Pigeon_dtl.html|work=All About Birds| access-date =2008-02-19 }}

= Life cycle =

{{Multiple image

| image1 = PikiWiki Israel 38606 Bokek spring.JPG

| caption1 = Pigeons nesting in outcrop nooks

| image2 = Columba livia MHNT.ZOO.2010.11.73.7.jpg

| alt2 = Two rock dove eggs in the collection of the Muséum de Toulouse

| caption2 = Two rock dove eggs; MHNT

| width = 200

| perrow = 1/1

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The species can breed at any time of the year due to their ability to produce crop milk, but peak times are spring and summer, when the food supply is abundant enough to support embryonic egg development. Laying of eggs can take place up to six times per year.{{Citation needed|date=August 2021}}Nesting sites are along coastal cliff faces, as well as the artificial cliff faces created by apartment buildings with accessible ledges or roof spaces.{{cite web|title=Columba livia |publisher=Australian Museum Online |url=http://www.amonline.net.au/factSheets/rock_dove.htm |access-date=2008-02-18 |url-status=dead |archive-url=https://web.archive.org/web/20080213123913/http://www.amonline.net.au/factSheets/rock_dove.htm |archive-date=February 13, 2008 }}

Courtship rituals of ferals are often observed in urban parks at any time of the year, and it is presumed that the wild populations have similar displays. Alighted males inflate their crops, puffing up the feathers on his neck to appear larger and thereby impress or attract attention (as seen in the header image). He approaches the female at a rapid walking pace while emitting repetitive quiet notes, often bowing and turning as he comes closer.{{Cite journal|last=Riddle|first=Gordon|date=Summer 1971|title=The breeding season in a rural colony of Feral Pigeons|url=https://www.the-soc.org.uk/files/docs/about-us/publications/scottish-birds/sb-vol06-no06.pdf#page=37|journal=The Journal of the Scottish Ornithologist's Club|volume=6|page=323}} At first, the female invariably walks or flies a short distance away and the male follows her until she stops. At this point, he continues the bowing motion and very often makes full- or half-pirouettes in front of the female.{{Cite book|last=Whitman|first=C. O.|url=https://books.google.com/books?id=tt1RAQAAMAAJ&pg=PR3|title=Posthumous Works: The behaviour of pigeons, ed. by Harvey A. Carr|publisher=Carnegie Institution of Washington|year=1919|location=Washington|page=10}} The male then proceeds to feed the female by regurgitating food, as they do when feeding the young.{{Citation needed|date=December 2019}} The male then mounts the female, rearing backwards to be able to join their cloacae. The mating is very brief, with the male flapping his wings to maintain balance on top of the female.

The rock dove is generally monogamous, with two squabs (young) per brood. Both parents care for the young for a time.{{cite book |last=Levi |first=Wendell |title= The Pigeon|year= 1977 |publisher=Levi Publishing Co.|location=Sumter, S.C.|isbn=0-85390-013-2 }} Current evidence suggests that wild, domestic and feral pigeons mate for life, although their long-term bonds are not unbreakable.{{cite journal|last1=Marchesan|first1=M.|year=2002|title=Operational sex ratio and breeding strategies in the Feral Pigeon Columba livia.|url=http://cat.inist.fr/?aModele=afficheN&cpsidt=13995403|journal=Ardea|volume=90|issue=2|pages=249–57}} They are socially monogamous, but extra-pair matings do occur, often initiated by males.{{cite journal|last1=Lovell-Mansbridge|first1=C.|last2=Birkhead|first2=T.R.|year=1998|title=Do female pigeons trade pair copulations for protection?|journal=Animal Behaviour|volume=56|issue=1|pages=249–57|doi=10.1006/anbe.1998.0774|pmid=9710482|s2cid=901466}}

The nest is a flimsy platform of straw and sticks, laid on a ledge, under cover, often on the window ledges of buildings. Two white eggs are laid; incubation, shared by both parents, lasts 17 to 19 days. The newly hatched squab(s) (nestling) has pale yellow down and a flesh-coloured bill with a dark band.{{Citation needed|date=February 2025}} For the first few days, the babies are tended and fed (through regurgitation) exclusively on crop milk (also called "pigeon milk" or "pigeon's milk"). The pigeon milk is produced in the crops of both parents in all species of pigeon and dove. Pigeons are altricial and their fledging period is about 30 days.

A rock dove's lifespan ranges from 3–5 years in the wild to 15 years in captivity, though longer-lived specimens have been reported.{{cite web| title =Columba livia (domest.) | publisher =BBC Science & Nature | url =http://www.bbc.co.uk/nature/wildfacts/factfiles/3030.shtml | access-date =2008-02-19 }} The main causes of mortality in the wild are predators and persecution by humans.{{citation needed|date= June 2013}}

= Feeding =

File:Hill Pigeons (Columba rupestris) & a Rock Dove (Columba livia), Gojal, Gilgit-Baltistan, Pakistan (46557702732).jpg with hill pigeons (Columba rupestris)]]

Rock doves are omnivorous, but prefer plant matter: chiefly fruits and grains.{{Cite journal|last1=Lowther|first1=P.|last2=Johnston|first2=R.|date=2020|editor-last=Billerman|editor-first=S.|title=Rock pigeon (Columba livia), version 1.0|url=https://birdsoftheworld.org/bow/species/rocpig/cur/introduction|publisher=Cornell Lab of Ornithology|doi=10.2173/bow.rocpig.01|url-access=subscription|access-date=August 6, 2020|journal=Birds of the World|s2cid=216428981}}

Pigeons feed on the ground in flocks or individually. Pigeon groups typically consist of "producers", which scout out food sources, and "scroungers", which follow the producers and feed on food located by them. Generally, groups of pigeons contain a greater proportion of scroungers than producers. Pigeons are naturally granivorous, eating seeds that fit down their gullet. They may sometimes consume small invertebrates such as worms or insect larvae as a protein supplement. As they do not possess an enlarged cecum as in European wood pigeons, they cannot digest adult plant tissue; the various seeds they eat contain the appropriate nutrients they require.{{Cite journal|last1=Murton|first1=R.K.|last2=Westwood|first2=N.J.|year=1966|title=The foods of the Rock Dove and Feral Pigeon|url=https://www.tandfonline.com/doi/pdf/10.1080/00063656609476116\?|journal=Bird Study|volume=13|issue=2|pages=130–146|doi=10.1080/00063656609476116|bibcode=1966BirdS..13..130M |url-access=subscription}}{{cite web|date=13 November 2014|title=Rock Pigeon|url=https://www.audubon.org/field-guide/bird/rock-pigeon}}{{cite journal|url=https://sora.unm.edu/sites/default/files/journals/wilson/v107n01/p0093-p0121.pdf|journal=Wilson Bull.|volume=107(l)|date=1995|pages=93–121|title=THE AVIAN CECUM: A REVIEW|author1=MARY H. CLENCH|author2=JOHN R. MATHIAS|access-date=13 March 2022}} While most birds take small sips and tilt their heads backwards when drinking, pigeons are able to dip their bills into the water and drink continuously, without having to tilt their heads back.{{cite book|last1=Dugatkin|first1=Lee Alan|title=Principles of Animal Behavior|date=2014|publisher=W. W. Norton Company|isbn=9780393920451|edition=3rd|location=New York|pages=373–376}}

= Preening =

Pigeons primarily use powder down feathers for preening, which gives a soft and silky feel to their plumage. They have no preen gland or at times have very rudimentary preen glands, so oil is not used for preening. Rather, powder down feathers are spread across the body. These have a tendency to disintegrate, and the powder, akin to talcum powder, helps maintain the plumage.{{cite web|title=Columbiformes (Pigeons, Doves, and Dodos)|url=http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/columbiformes-pigeons-doves-and-dodos|access-date=26 April 2017|website=Encyclopedia.com|publisher=Grzimek's Animal Life Encyclopedia COPYRIGHT 2004 The Gale Group Inc.}}

= Predators =

File:FeralPigeonPulledOutAllTailFeathers01.jpg

With only their flying abilities protecting them from predation, rock doves around the world are a favourite prey item for a wide range of raptors. In fact, with feral pigeons existing in almost every city in the world, they may form the majority of prey for several raptor species that live in urban areas. Peregrine falcons and Eurasian sparrowhawks are natural predators of pigeons and quite adept at catching and feeding upon this species. Up to 80% of the diet of peregrine falcons in several cities that have breeding falcons is composed of feral pigeons.{{cite web|author=White, Clayton M.|author2=Nancy J. Clum|author3=Tom J. Cade|author4=W. Grainger Hunt|name-list-style=amp|title=Peregrine Falcon|url=http://bna.birds.cornell.edu/bna/species/660/articles/foodhabits|access-date=2011-08-30|work=Birds of North America Online}} In all life stages, rock doves are at risk from domestic cats, including strays. Doves and pigeons in general are considered to be game birds, since many species are hunted and used for food in many of the countries in which they are native.{{cite web|last=Butler|first=Krissy Anne|title=Keeping & Breeding Doves & Pigeons|url=http://www.gamebird.com/dove.html|url-status=dead|archive-url=https://web.archive.org/web/20080228062340/http://www.gamebird.com/dove.html|archive-date=2008-02-28|access-date=2008-02-23|publisher=Game Bird Gazette Magazine}}

Their body feathers have dense, fluffy bases and are loosely attached to the skin, hence they drop out easily. When a predator catches a pigeon, large numbers of feathers are often pulled by the attacker's mouth and the pigeon may use this temporary distraction to make an escape. Tail feathers are also dropped when preyed upon or under traumatic conditions, probably as a distraction mechanism.{{cite web|last1=Naish|first1=Darren|title=The detachable tails of pigeons|url=http://scienceblogs.com/tetrapodzoology/2008/09/18/detachable-tails-of-pigeons/|access-date=18 September 2008|website=Scienceblogs.com|publisher=2006-2017 ScienceBlogs LLC}}

Relationship to humans

The rock dove was central to Charles Darwin's discovery of evolution, and featured in four of his works from 1859 to 1872. Darwin posited that, despite wide-ranging morphological differences, the many hundreds of breeds of domestic pigeon could all be traced back to the wild rock dove; in essence human selection of pigeon breeds was analogous to natural selection.{{Cite journal|last=Baptista|first=L.|date=2009|title=Darwin's pigeons and the evolution of the columbiforms: recapitulation of ancient genes|url=https://www.redalyc.org/pdf/575/57512077023.pdf|journal=Acta Zoológica Mexicana |series=Nueva Serie|volume=25|issue=3|pages=719–741|doi=10.21829/azm.2009.253674 }}

Rock doves often have a commensal relationship with humans, gaining both ample access to food and nesting spots in inhabited areas. Human structures provide an excellent imitation of cliff structures, making rock doves very common around human habitation. Skyscrapers, highway overpasses, farm buildings, abandoned buildings, and other human structures with ample crevices are conducive to rock dove nesting. Thus the modern range of the rock dove is due in large part to humans. Agricultural settlements are favoured over forested ones.{{Cite journal|last1=Hetmański|first1=Tomasz|last2=Bocheński|first2=Marcin|last3=Tryjanowski|first3=Piotr|last4=Skórka|first4=Piotr|date=2011-06-01|title=The effect of habitat and number of inhabitants on the population sizes of feral pigeons around towns in northern Poland|journal=European Journal of Wildlife Research|language=en|volume=57|issue=3|pages=421–428|doi=10.1007/s10344-010-0448-z|s2cid=20351031|issn=1439-0574|doi-access=free|bibcode=2011EJWR...57..421H }} Ideal human nesting attributes combine areas with tall buildings, green spaces, ample access to human food, and schools. Conversely, suburban areas which are far from city centers and have high street density are the least conducive to pigeons.{{Cite journal|last1=Przybylska|first1=Katarzyna|last2=Haidt|first2=Andżelika|last3=Myczko|first3=Łukasz|last4=Ekner-Grzyb|first4=Anna|last5=Rosin|first5=Zuzanna M.|last6=Kwieciński|first6=Zbigniew|last7=Tryjanowski|first7=Piotr|last8=Suchodolska|first8=Joanna|last9=Takacs|first9=Viktoria|last10=Jankowiak|first10=Łukasz|last11=Tobółka|first11=Marcin|date=2012-06-30|title=Local and landscape-level factors affecting the density and distribution of the Feral Pigeon Columba livia var. domestica in an urban environment|url=https://www.ingentaconnect.com/content/miiz/actao/2012/00000047/00000001/art00004|journal=Acta Ornithologica|volume=47|issue=1|pages=37–45|doi=10.3161/000164512X653908|s2cid=56390450|url-access=subscription}} Their versatility among human structures is evidenced by a population living inside a deep well in Tunisia.

= Domestication =

{{main|Domestic pigeon|Feral pigeon}}

Rock doves have been domesticated for several thousand years, giving rise to the domestic pigeon. They may have been domesticated as long as 5,000 years ago.{{Cite journal|last=Johnston|first=Richard F.|date=1992-07-01|title=Evolution in the Rock Dove: Skeletal Morphology|url=https://academic.oup.com/auk/article/109/3/530/5172583|journal=The Auk|language=en|volume=109|issue=3|pages=530–542|doi=10.1093/auk/109.3.530|doi-broken-date=1 November 2024|issn=0004-8038}} Domesticated pigeons are used as homing pigeons as well as food and pets. They were in the past also used as carrier pigeons, used to deliver messages in peacetime or during war. Numerous breeds of fancy pigeons of all sizes, forms, and colours have been bred.{{cite book |last=McClary |first=Douglas |title= Pigeons for Everyone|year= 1999|publisher= Winckley Press|location= Great Britain|isbn=0-907769-28-4 }}

Feral pigeons (sometimes given the invalid names "Columba livia domestica" or "Columba livia forma urbana"), also called city doves, city pigeons, or street pigeons,Nagy, Kelsi, and Johnson, Phillip David. Trash animals: how we live with natures filthy, feral, invasive, and unwanted species. Minneapolis (Minn.), University of Minnesota Press, 2013.Blechman, Andrew D. Pigeons: The Fascinating Saga of the World’s Most Revered and Reviled Bird, St Lucia, Qld., University of Queensland Press, 2007. are descendants of domestic pigeons living independently and often unwanted by humans.{{cite web |title=Science & Nature: Animals: Feral Pigeon |url=https://www.bbc.co.uk/nature/life/Rock_Pigeon |url-status=dead |archive-url=https://web.archive.org/web/20180708135927/http://www.bbc.co.uk:80/nature/life/Rock_Pigeon |archive-date=8 July 2018 |access-date=5 January 2008 |publisher=BBC |format=Web article}} They are often described as a public nuisance, being a potential reservoir of disease and cause of property damage.{{Cite journal |last1=Chaves |first1=Víctor Acosta- |last2=Monge |first2=Otto |date=2015-06-05 |title=List of harmful birds in Costa Rica : the other side of the coin |url=https://revistas.uned.ac.cr/index.php/cuadernos/article/view/869 |journal=UNED Research Journal |language=en |volume=7 |issue=1 |pages=99–102 |doi=10.22458/urj.v7i1.869 |issn=1659-441X|doi-access=free }}{{cite conference|last=Pimental|first=D.|year=2007|title=Environmental and economic costs of vertebrate species invasions into the United States| conference=Managing Vertebrate Invasive Species: Proceedings of an International Symposium|editor=G. W. Witmer |editor2=W. C. Pitt |editor3=K. A. Fagerstone |publisher=USDA/APHIS/WS, National Wildlife Research Center |location=Fort Collins, US |url=https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1037&context=nwrcinvasive}}{{cite book |last1=Bonnefoy |first1=Xavier |url=https://apps.who.int/iris/bitstream/handle/10665/107363/9789289071888-eng.pdf |title=Public health significance of urban pests |last2=Kampen |first2=Helge |last3=Sweeney |first3=Kevin |publisher=World Health Organization |year=2008}}{{cbignore|bot=medic}}{{cite web |last1=Zelman |first1=Robbie |title=Pigeon Droppings Health Risk – Should You Worry? |url=https://pigeonsrus.com/pigeon-droppings-health-risk-should-you-worry/ |website=pigeonsrus.com |date=12 August 2024 |publisher=Pigeons R Us |access-date=19 February 2025}}{{cite web |title=Nuisance Problems Caused By Pigeons |url=https://animalshappen.com/nuisance-problems-caused-by-pigeons/ |website=animalshappen.com |date=29 November 2023 |publisher=Animal Happen Wildlife Control & Animal Removal Services |access-date=19 February 2025}}{{cite web |title=The Real Safety and Health Risks of Bird Droppings |url=https://blog.birdbarrier.com/real-safety-health-risks-of-bird-droppings |website=blog.birdbarrier.com |publisher=Bird Barrier |access-date=19 February 2025}}{{cite web |title=Identifying a Pigeon Infestation: Signs and Solutions |url=https://wavepestservices.com/identifying-a-pigeon-infestation-signs-and-solutions/ |website=wavepestservices.com |publisher=Wave Pest Services |access-date=19 February 2025}}

References

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