TheIndian peafowl (Pavo cristatus), also known as thecommon peafowl, orblue peafowl, is aspecies ofpeafowl native to theIndian subcontinent. While it originated in the Indian subcontinent, it has since been introduced to many other parts of the world. Male peafowl are referred to aspeacocks, and female peafowl are referred to aspeahens, although both sexes are often referred tocolloquially as a "peacock".
The Indian peafowl displays a marked form ofsexual dimorphism. The brightly coloured male has a blue coloured head with a fan-shaped crest and is best known for his longtrain. The train is made up of elongated upper-tailcovert feathers with colourful eyespots. These stiff feathers are raised into a fan and quivered in a display duringcourtship. The peahen is predominantly brown in colour, with a white face and iridescent green lower neck, and lacks the elaborate train. There are several colour mutations of the Indian peafowl including theleucistic white peafowl.
Despite the length and size of the covert feathers, the peacock is still capable of flight. The peafowl lives mainly on the ground in open forests or on cultivable lands where it forages for berries and grains, and also preys on snakes, lizards and small rodents. It makes loud calls, which makes it easier to detect, and are often used to indicate the presence of a predator in the forest areas. It forages on the ground in small groups and usually escapes on foot through undergrowth and avoids flying, though it flies into tall trees to roost.
The function of the Indian peacock's elaborate train has been debated for more than a century. In the 19th century,Charles Darwin found it a puzzle, hard to explain through ordinarynatural selection. His later explanation,sexual selection, is widely but not universally accepted. In the 20th century,Amotz Zahavi argued that the train was ahandicap, and that males were honestlysignalling their fitness in proportion to the splendour of their trains. Despite extensive study, opinions remain divided on the mechanisms involved.
The earliest usage of the word peacock in written English was from the 14th century whereGeoffrey Chaucer used the word in asimile "proud a pekok" in his poemTroilus and Criseyde.[9][10] Various spelling variants included peacock, pacok, pecok, pekok, pokok, and pocok among others.[5]
Head of a male Indian peafowl, showing his fan shapedcrest
The Indian peafowl's size, color and shape of the crest make them easily identifiable within their native distribution range.[11] It displays a marked form ofsexual dimorphism.[12][13] A male peafowl or peacock is a larger sized bird with an average bill to tail length of 100–120 cm (40–46 in) and as much as 200–230 cm (78–90 in) to the end of a fully growntrain. It weighs 4.1–5.2 kg (9–11.5 lb) and is amongst the heaviest birds inPhasianidae. The male has a metallic blue crown with short and curled, blue-greenish head feathers. It has a fan-shapedcrest with bare black shafts and tipped with bluish-green webbing. A white stripe above the eye and a crescent shaped white patch below the eye are formed by bare white skin. Thelore, chin and throat are covered with greenish feathers. It has a long blue neck with scaly bronze-green feathers with black and copper markings in the back. The scapular region and wings are made of chestnut colored primary feathers with black secondaries. The tail is dark brown with glossy green chest, buff thighs, and blackish-brown abdomen and tailcoverts.[14][15]
Close-up of the tail covert, showing the distinct eye-spot
The male is best known for his elongated train, which extend from therump. The train is made up of elongated upper tail coverts, which are bronze-green train with the outermost and longer feathers ending up with an elaborate eye-spot. The eye-spots consist of a purplish-black, heart-shaped nucleus, enclosed by blue and an outer copper rim, which is surrounded by alternating green and bronze. A few of the outer feathers lack the spot and end in a crescent shaped black tip.[14][15] The feathers of the train do not have colored pigments and the colorization is a result of the micro-structure of the feathers and the optical phenomena involved.[16] The male has a spur on the leg above the hind toe. The train feathers and the tarsal spur of the male start developing only in the second year of its life. The trains are not fully developed until the age of four.[17] The train feathers of the male Indian peafowl are alsomoulted every year, usually starting at the end of themonsoon in August or September and are fully developed by February to March.[14][17] The moult of the flight feathers may be spread out across the year.[18]
The females or peahens, are smaller at around 38 cm (15 in) in length and weigh 2.7–4.1 kg (6–9 lb). The peahen has a rufous-brown head with a crest, whose tips are chestnut colored and edged with green. The upper body is brownish with pale mottling and the primaries, secondaries and tail are dark brown. The lower neck is metallic green with dark brown breast feathers glossed with green and whitish underparts. Both sexes have dark brown eyes, brown coloredbeak and legs. Young males also resemble the females with chestnut colored primaries.[14][15]
There are several colour mutations of the Indian peafowl that have become common in captive birds throughselective breeding. The black-shouldered mutation was initially considered as a subspecies or even a separate species of the Indian peafowl (P. nigripennis).[19]Charles Darwin presented firm evidence for it being a variety under domestication, which is now well established and accepted. It was important for Darwin to prove that it was a colour variation rather than a wild species as it was contrary to his theory of slow modification by natural selection in the wild.[20] In this genetic variation, the adult male ismelanistic with black wings. The young birds are creamy white with fulvous-tipped wings. The gene which produces melanism in the male, causes a dilution of colour in females, which have creamy white and brown markings.[14][21] Other forms of mutations include the pied and white mutations, which are the result ofallelic variation at specificloci.[22][23]
Crosses between a malegreen peafowl (Pavo muticus) and a female Indian peafowl (P. cristatus) produce a stable hybrid called a "Spalding", named after Keith Spalding, a bird fancier fromCalifornia.[24] There can beoutbreeding depression if birds of unknown pedigree are released into the wild, as the viability of such hybrids and their offspring is often reduced as perHaldane's rule.[25][26]
The Indian peafowl is a resident breeder in theIndian subcontinent and is found across most ofIndia andSri Lanka. In India, it is found across the country from theIndus valley in the north-west toAssam in the north-east, and fromHimalayas in the north to the southern tip, except for the marshlands ofSunderbans inEast India. In India, it is found up to elevations of 5,000 ft (1,500 m) in the north and upto 6,000 ft (1,800 m) in the mountains of the south. In Sri Lanka, it largely inhabits the drier lowland areas. It is generally found in forests, small hills, and bushy areas near water sources. It also occupies cultivable lands and live in a semi-domesticated state in human habitations.[14][15][27] The peafowl has since been introduced in many other parts of the world and has becomeferal in some areas.[28][29] It was supposedly introduced intoEurope byAlexander the Great, while the bird might have been introduced earlier and had reachedAthens by 450 BCE.[30][31]
The first whole-genome sequencing of the Indian peafowl identified 15,970protein-coding sequences and was found to have less repetitiveDNA (8.62%) than that of the chicken genome (9.45%). Studies have suggested that the population suffered at least two bottlenecks (fourmya and 450,000 years ago), which resulted in a severe reduction in its effective population size.[32]
The Indian peafowl forages on the ground in small groups, known as musters, that usually have a single peacock and three to five peahens. After the breeding season, the flocks tend to be made up only of females and young. It is found in the open early in the mornings and tends to rest under cover during the heat of the day. It is often sighted dust-bathing at dusk.[28] It roosts on tall trees at night, but may sometimes make use of rocks or buildings.[15][33][34] Birds usually arrive at their roosting sites during the dusk and call frequently before taking their positions.[35] Despite its size, the Indian peafowl is capable of flight. However, it rarely flies and often escapes by running on foot through the undergrowth when perturbed or disturbed. When it takes off, it uses regular, slower flaps to maintain flight rather than gliding.[15][28]
The Indian peafowl is found lazily feeding in the open early in the mornings, and might move to cultivated lands to feed during the mornings and the evenings.[15] The groups often walk in single file to the nearby waterholes for a drink.[28] The birds often congregate near human habitats and might be fed by humans.[15] It is omnivorous and feeds on grass, seeds, flowerbuds, fruits, insects, and small reptiles.[14] It feeds on smaller snakes but keeps its distance from larger ones.[36] It also feeds on a wide range of crops such asgroundnut,tomato,paddy,chili andbananas in cultivated areas.[37] InWestern India, a large percentage of its food is made up of the fallen berries ofZizyphus.[38] Around human habitations, it feeds on food scraps and even humanexcreta.[28]
The most common calls are a loudpia-ow ormay-awe with the frequency of calling increasing before themonsoon season. It raises loud sounds when alarmed or disturbed and are often used to indicate the presence of apredators such as thetiger in the forests. It also makes other calls such as a rapid series ofka-aan..ka-aan or a rapidkok-kok. It often emits an explosive low-pitchedhonk! when agitated.[15][28][37] It might even call at night when alarmed and neighboring birds may call in a relay like series. Nearly seven different call variants have been identified apart from six variants of alarm calls that are commonly produced by both the sexes.[39]
Indian peacocks arepolygamous.[14] The peafowl usually reachessexual maturity at the age of two to three years old.[40] The breeding season may be spread out over the entire year and is more common during the monsoon months of June to August.[15] Several males may congregate at alek site and these males are often closely related.[41] Males at leks maintain small territories next to each other and allow females to visit them. Males make no attempt to guard harems and females do not favour specific males.[42]
A peacock uses its ornate train in acourtship display, wherein it raises the tail feathers into an arched fan and quivers them.[14] The wings are held half open and drooped and it periodically vibrates the long feathers, producing a ruffling sound. It faces the peahen initially and might turn around to display the tail.[28] The peacock may also freeze over food to invite a peahen in a form ofcourtship feeding.[43] While peacocks may also display even in the absence of peahens, it is usually done close to the females. When a peacock is displaying, peahens appear not to show any interest and usually continue their foraging.[37]
The nests are usually shallow hollow scrapes on the ground lined with leaves, sticks and other debris. The peafowl might also nest on crevices in the buildings, and disused nests ofvultures.[15][44] The female lays a clutch of three to eight oval shaped eggs. The eggs measure about 2.45–3 in (6.2–7.6 cm) in length and 1.42–2.2 in (3.6–5.6 cm) in width. They appear polished and have thick shells with pits and pores. The color varies from pale white to buff or reddish-brown. The males take no part in hatching or rearing the young.[15] However, isolated unusual instance of a male incubating a clutch of eggs has been reported.[28][45] The eggs are incubated by the females for about 28 to 30 days.[46] The chicks arenidifugous and follow the mother around after hatching. Downy young may sometimes climb on their mothers' back and the female may carry them in flight to a safe tree branch.[47]
The Indian peacock is known for its brighter and elaborate colours, compared to the much duller peahen, which has been a puzzle to scientists.Charles Darwin failed to see an adaptive advantage for the extravagant tail which seemed only to be an encumbrance. He wrote to botanistAsa Gray, "the sight of a feather in a peacock's tail, whenever I gaze at it, makes me sick!". He developed the principle ofsexual selection to explain the problem, however, though not everyone accepted the theory.[48] In 1907, American artistAbbott Handerson Thayer showed in his painting that the eyespots helped form adisruptive camouflage.[49] In his 1909 bookConcealing-Coloration in the Animal Kingdom, he denied the possibility of sexual selection and argued that essentially all forms ofanimal coloration had evolved ascamouflage.[50] The theory was criticized by formerU.S. PresidentTheodore Roosevelt.[51]
In the 1970s,Israeli biologistAmotz Zahavi proposed a possible resolution to the apparent contradiction between natural selection and sexual selection. He argued that the peacockhonestly signalled thehandicap of having a large and costly train. However, the mechanism may be less straightforward than it seems and the cost could be that thehormones that enhance feather development also results in the depression of theimmune system.[52][53]Ronald Fisher'srunaway model proposed a positive feedback between female preference for elaborate trains and development of the elaborate train itself. However, this model assumes that the male train is a relatively recent evolutionary adaptation and a molecular phylogeny study shows the opposite that the most recently evolved species is actually the least ornamented one.[54] This finding suggests a chase-away sexual selection in which females evolved resistance to the male ploy of elaborate trains".[55]
A study on the feral population of Indian peafowl atWhipsnade Wildlife Park in southernEngland showed that the number of eyespots in the train predicted a male's mating success; further, this success could be manipulated by cutting the eyespots off some of the male's ornate feathers. Furthermore, the study also found that the chicks fathered by more ornamented males weighed more than those fathered by less ornamented males, which indicated an increased survival ability.[56] However, recent studies have failed to find a relation between the number of displayed eyespots and mating success.[57]
Close up of the open train of an Indian peacock, showing his eye-spots
A seven-year study of free-ranging peafowl came to the conclusion that female peafowl do not select mates solely on the basis of their trains and it is an obsolete signal for which female preference has already been "lost or weakened". It found no evidence that peahens expressed any preference for peacocks with more elaborate trains, trains having moreocelli, a more symmetrical arrangement, or greater length. It determined that the peacock's train was not the universal target of femalemate choice, and do not correlate to male physical conditions. It argued that the removal of eyespots substantially changed the appearance of male peafowls, and it was likely that the females mistook these males for sub-adults, or perceived that the males were physically damaged. Moreover, in a feral peafowl population, there is little variation in the number of eyespots in adult males as it is rare for adult males to lose a significant number of eyespots and hence, it might not form the basis for sexual selection.[58] The British research team argued that alternative explanations for these results had been overlooked, and concluded that female choice might indeed vary in different ecological conditions.[56]
A 2010 study on a natural population of Indian peafowls in northern India proposed a "high maintenance handicap" theory. It stated that only the fittest males can afford the time and energy to maintain a long tail and the long train is an indicator of good body condition, which results in greater mating success.[59] While train length seems to correlate positively withmajor histocompatibility complex diversity in males, females do not appear to use train length to choose males.[60] Another study in France brought up two possible explanations with the first explanation stating that there might be a genetic variation of the trait of interest under different geographical areas due to afounder effect and/or agenetic drift. The second explanation suggested that "the cost of trait expression may vary with environmental conditions," so that a trait that is indicative of a particular quality may not work in another environment.[56] A 2013 study that tracked the eye movements of peahens responding to male displays found that the peahens looked in the direction of the upper train of feathers only when at long distances and that they looked only at the lower feathers when males displayed close to them. The rattling of the tail and the shaking of the wings helped in keeping the attention of females.[61]
The Indian peafowl is known to live for up to 23 years in captivity. However, it is estimated to live for only about 15 years in the wild.[62] Largepredators such astiger,leopard,hyena,dhole, andgolden jackal, can ambush an adult Indian peafowl. An adult peafowl is difficult to capture since it can usually escape these ground predators by flying into trees.[63][64] Smaller peafowl can be sometimes hunted by large birds of prey such aschangeable hawk-eagle androck eagle-owl.[65][66] Chicks are more prone to predation than adult birds. Adults living near human habitations might sometimes be hunted by domesticdogs or by humans.[37] The peafowls often forage in groups as it provides some safety as there are more eyes to look out for predators.[67]
The Indian peafowl is widely distributed across India and Sri Lanka, with introduced feral colonies in many parts of the world. Conservative estimates of the population in 2002 put them at more than 100,000.[68] While the exact population size is unknown, it is not believed to be under decline. Hence, it is classified asleast concern by theIUCN.[69] Poaching of peacocks for their meat and feathers and accidental poisoning by feeding on pesticide treated seeds are known threats to wild birds.[70][71] It is also hunted in some areas for usage in folk remedies.[37] The birds have been part of the agricultural ecosystem for centuries, where they aid in seed dispersal and feed on pests such as insects and small rodents. However, the birds can be a nuisance to agriculture as they trample crops and overeat the grains. A 2018 study found that there can be a 40% decrease in yield inpaddy fields due to the damage caused by the birds.[28][72][73] In urban areas, they can damage plants in gardens, attack their reflections (thereby breaking glass and mirrors), perch and scratch cars or leave their droppings.[74]
The Indian peafowl is protected both culturally and by law in India and Sri lanka.[15][73] Methods to identify if feathers have been plucked or have been shed naturally have been developed, as Indian law allows only the collection of feathers that have been shed.[75] Various methods have been employed to restrict access to the farmlands such as usage of jute fencing and application of non-poisonous pesticides to reduce fatality of the birds.[citation needed] Cities have been introduced peafowl management programmes, which include education on how to prevent the birds from causing damage while treating the birds humanely.[76][77][78] Variouswildlife sanctuaries have been established in India such asAdichunchanagiri,Choolannur, andViralimalai for the protection of the species.[79] The Indian peafowl also breed readily in captivity and various zoos, parks, and bird-fanciers maintain breeding populations across the world.[80][81][82]
The Indian peafowl has been used in numerous mythological and contemporary representations.[28] It is designated as thenational bird of India.[83] In the Indian subcontinent, manyHindu deities are associated with the bird, and it is frequently depicted in various temple art, mythology, poetry, folk music, and traditions.[84] The Hindu war godKartikeya is depicted as using an Indian peacock named Paravani as hisvahana.[85] Hindu godKrishna is often depicted with an Indian peacock feather on his crown. TheRamayana describes that the head of thedevas,Indra, who unable to defeat theasura kingRavana, sheltered under the wing of a peacock and later blessed it with a "thousand eyes" and fearlessness from serpents.[86] Another mythological story narrates that Indra was cursed with a thousand ulcers and was transformed into a peacock with a thousand eyes before his curse was removed byVishnu.[87] InBuddhist philosophy, the Indian peacock represents wisdom.[88]
Numerous uses of the bird's parts as an antidote to snake venom inAyurveda and other folk remedies have been documented.[89] It is part of folklore with beliefs such as the impregnation of peahens orally by means of the tears of the peacocks.[90][91] InGreek mythology, the origin of the Indian peacock's plumage is explained in the tale ofHera andArgus.[24] The main figure ofYezidis,Melek Taus, is commonly depicted as a peacock.[92][93] Agolden peacock is considered as a symbol ofAshkenazi Jewish culture, and is the subject of several folktales and songs in Yiddish.[94][95] In theMiddle Ages, knights in Europe took a "vow of the peacock" and decorated their helmets with its plumes. InRobin Hood stories, the titular archer uses arrows fletched with peacock feathers. Peacock feathers were buried withViking warriors.[96]
The birds were often kept in menageries and as ornaments in large gardens and estates in the middle ages. In 1526, the legal issue as to whether peacocks were wild or domestic fowl was thought sufficiently important forCardinal Wolsey to summon all the English judges to give their opinion, which was that they are domestic fowl.[97] Indian peacocks were frequently used in European heraldry with the peacocks most often depicted as facing the viewer and with the tails displayed. In this pose, the peacock is referred to as being "in his pride". Peacock tails, in isolation from the rest of the bird, are rare in British heraldry, but are used frequently inGerman systems.[98] The Indian peacock feathers are used in many rituals and ornamentation and its motifs are widespread in architecture, coinage, textiles and modern items of art and utility.[31] Indian peacock motifs are widely used even today such as in the logos of theNBC television network andSriLankan Airlines.[99][100]
The term "peacocking" is often used as a means of depicting pride inEnglish language and is used to describe someone who is very proud or gives a lot of attention to clothing.[5][101] In Australia, it referred to the practice of buying up the best pieces of land so as to render the surrounding lands valueless.[102]
^Jobling, J. A."cristatus".The Key to Scientific Names. Cornell Lab of Ornithology.Archived from the original on 15 February 2025. Retrieved15 February 2025.
^"Pavo cristatus".India biodiversity portal.Archived from the original on 18 April 2024. Retrieved1 June 2024.
^Elphick, C.S.; Reed, M.; Delehanty, D.J. (2007). "Applications of reproductive biology to bird conservation and population management". In Jamieson, B.G.M. (ed.).Reproductive Biology and Phylogeny of Birds, Part B: Sexual Selection, Behavior, Conservation, Embryology and Genetics. Enfield: Science Publishers. p. 377.ISBN978-1-482-28051-7.
^Van Grouw, H.; Dekkers, W. (2023). "The taxonomic history of Black-shouldered Peafowl; with Darwin's help downgraded from species to variation".Bulletin of the British Ornithologists' Club.143 (1):111–121.doi:10.25226/bboc.v143i1.2023.a7.hdl:10141/623047.
^Seth-Smith, D. (1940). "Peafowl".Avicultural Magazine. Vol. 5. pp. 205–206.
^Somes, R. G.; Burger, R. E. (1991). "Plumage Color Inheritance of the Indian Blue Peafowl (Pavo Cristatus): Blue, Black-Shouldered, Cameo, and Oaten".Journal of Heredity.82:64–68.doi:10.1093/jhered/82.1.64.
^Somes, R. G.; Burger, R. E. (1993). "Inheritance of the White and Pied Plumage Color Patterns in the Indian Peafowl (Pavo cristatus)".Journal of Heredity.84 (1):57–62.doi:10.1093/oxfordjournals.jhered.a111277.
^Johnsingh, A.J.T. (1976)."Peacocks and cobra".Journal of the Bombay Natural History Society.73 (1): 214.Archived from the original on 2 August 2020. Retrieved21 December 2017.
^Takahashi, M.; Hasegawa, T. (2008). "Seasonal and diurnal use of eight different call types by Indian peafowl (Pavo cristatus)".Journal of Ethology.26 (3):375–381.doi:10.1007/s10164-007-0078-4.S2CID27794735.
^Roosevelt, T. (1911). "Revealing and concealing coloration in birds and mammals".Bulletin of the American Museum of Natural History.30 (Article 8):119–231.hdl:2246/470.
^Ros, A.; Correia, M.; Wingfield, J.; Oliveira, R. (2009). "Mounting an immune response correlates with decreased androgen levels in male peafowl,Pavo cristatus".Journal of Ethology.27 (2):209–214.doi:10.1007/s10164-008-0105-0.hdl:10400.12/1242.S2CID25651539.
^Kimball, T. T.; Braun, E. L.; Ligon, J. D.; Lucchini, V.; Randi, E. (2001). "A molecular phylogeny of the peacock-pheasants (Galliformes: Polyplectron spp.) indicates loss and reduction of ornamental traits and display behaviours".Biological Journal of the Linnean Society.73 (2):187–198.Bibcode:2001BJLS...73..187K.doi:10.1006/bijl.2001.0536.
^Davies, N. B.; Krebs, J. R.; West, S. A. (2012).Introduction to Behavioural Ecology (Fourth ed.).John Wiley & Sons. pp. 179–222.
^abcLoyau, A.; Petrie, M.; Jalme, M. S.; Sorci, G. (2008). "Do peahens not prefer peacocks with more elaborate trains?".Animal Behaviour.76 (5):e5–e9.doi:10.1016/j.anbehav.2008.07.021.S2CID40638610.
^Takahashi, M.; Arita, H.; Hiraiwa-Hasegawa, M.; Hasegawa, T. (2008). "Peahens do not prefer peacocks with more elaborate trains".Animal Behaviour.75 (4):1209–1219.doi:10.1016/j.anbehav.2007.10.004.
^M. S. S. Flower (1938). "The duration of life in animals – IV. Birds: special notes by orders and families".Proceedings of the Zoological Society of London:195–235.
^Hayward, M. W.; Jędrzejewski, W.; Jedrzejewska, B. (2012). "Prey preferences of the tigerPanthera tigris".Journal of Zoology.286 (3):221–231.doi:10.1111/j.1469-7998.2011.00871.x.
^C. Arviazhagan; R. Arumugam; K. Thiyagesan (2007). "Food habits of leopard (panthera pardus fusca), dhole (cuon alpinus) and striped hyena (hyaena hyaena) in a tropical dry thorn forest of southern India".Journal of the Bombay Natural History Society.104:178–187.
^"Peafowl".City of San Antonio.Archived from the original on 27 June 2024. Retrieved1 June 2024.
^V. Sahajpal; S. P. Goyal (2008). "Identification of shed or plucked origin of Indian Peafowl (Pavo cristatus) tail feathers: Preliminary findings".Science and Justice.48 (2):76–78.doi:10.1016/j.scijus.2007.08.002.PMID18700500.
^Fitzpatrick, J. (1923)."Folklore of birds and beasts of India".Journal of the Bombay Natural History Society.28 (2):562–565.Archived from the original on 2 August 2020. Retrieved21 December 2017.
^Emeneau, M. B. (1943). "Studies in the Folk-Tales of India: I: Some Origin Stories of the Todas and Kotas".Journal of the American Oriental Society.63 (2):158–168.doi:10.2307/594123.JSTOR594123.
Galusha, JG; Hill, LM (1996) A study of the behaviour of Indian PeacocksPavo cristatus on Protection Island, Jefferson County, Washington, USA. Pavo 34(1&2):23–31.
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