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Monk parakeet

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The monk parakeet (Myiopsitta monachus), also known as the monk parrot or Quaker parrot, is a species of true parrot in the family Psittacidae. It is a small, bright-green parrot with a greyish breast and greenish-yellow abdomen. Its average lifespan is approximately 15 years. It originates from the temperate to subtropical areas of South America. Self-sustaining feral populations occur in many places, mainly in areas of similar climate in North America and Europe.

Monk parakeet
At Transpantaneira, Poconé, Mato Grosso, Brazil
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Psittaciformes
Family: Psittacidae
Genus: Myiopsitta
Species:
M. monachus
Binomial name
Myiopsitta monachus
(Boddaert, 1783)
Subspecies

2–4, see text

Synonyms

Psittacus monachus (Boddaert, 1783)

Taxonomy

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The monk parakeet was described by French polymath Georges-Louis Leclerc, Comte de Buffon, in 1780 in his Histoire Naturelle des Oiseaux.[2] The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle, which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text.[3] Neither the plate caption nor Buffon's description included a scientific name, but in 1783, Dutch naturalist Pieter Boddaert coined the binomial name Psittacus monachus in his catalogue of the Planches Enluminées.[4] As Buffon did not specify the origin of his specimen, in 1937 the American ornithologist James Peters assigned the type location as Montevideo, Uruguay.[5] The monk parakeet is now placed in the genus Myiopsitta that was introduced by French naturalist Charles Lucien Bonaparte in 1854.[6][7] The genus name combines the Ancient Greek mus, muos meaning "mouse" and the Neo-Latin psitta meaning "parrot", alluding to the mouse-grey face and underparts. The specific epithet monachus is Late Latin for a "monk".[8]

The monk parakeet is one of two species in the genus Myiopsitta, the other being the cliff parakeet (Myiopsitta luchsi). The two parakeets were previously considered to be a single species. Due to morphological and behavioral differences, and geographical dissimilarities, the cliff parakeet has been elevated to species status.[7] The cliff parakeet's altitudinal range apparently does not overlap, so is thus entirely, but just barely, allopatric.[9] The American Ornithological Society has deferred recognizing the cliff parakeet as distinct "because of insufficient published data".[10]

Three subspecies are recognized:[11][9]

Smaller than monachus, wings more prominently blue, gray of head darker.

The subspecies' ranges meet in the general area of Paraguay, and there they are insufficiently delimited. The distinctness and delimitation of M. m. calita and M. m. cotorra especially require further study.

Description

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Female pet from a free flight session in Uruguay
External audio
  Monk Parakeet bird call may be heard here, from xeno-canto.org, retrieved 1.08.2018

The nominate subspecies of this parrot is 29 cm (11 in) long on average, with a 48-centimetre (19 in) wingspan, and weighs 100 g (3.5 oz). Females tend to be 10–20% smaller, but can only be reliably sexed by DNA or feather testing. Monk parakeets display very subtle sexual dimorphism in the coloration of their crown and wing coverts, but this is not noticeable to the human eye.[13] It has bright-green upperparts. The forehead and breast are pale gray with darker scalloping and the rest of the underparts are very light-green to yellow. The remiges are dark blue, and the tail is long and tapering. The bill is orange. The call is a loud and throaty chape(-yee) or quak quaki quak-wi quarr, and screeches skveet.[11][9]

Domestic breeds in colors other than the natural plumage have been produced. These include birds with white, blue, and yellow in place of green.[citation needed] As such coloration provides less camouflage, feral birds are usually of wild-type coloration.[citation needed]

Behaviour and ecology

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Nests in Zaragoza
 
A nest in Santiago
 
Egg.

The monk parakeet and the cliff parakeet are the only two parrot species outside some members of the African lovebirds (Agapornis sp.)[14] that build nests. Monk and cliff parakeets are unique among even nesting parrots for their construction of large, external nests in trees or manmade structures instead of using tree cavities.[15]

The monk parrot is a gregarious species which often breeds colonially, building a single large nest with separate entrances for each pair.[15][16] It is not uncommon, however, for pairs or individuals to nest outside of colonies, especially during the breeding season.[16] In the wild, the colonies can become quite large, with pairs occupying separate "apartments" in composite nests that can reach the size of a small automobile.[citation needed] These nests can attract many other tenants, including some which cohabit with the monk parakeets.[17] These tenants include many other birds, such as pigeons, sparrows, American kestrels, and yellow-billed teal, but mammals like red squirrels may also occupy a nest.[15][17][18]

Their 1 - 11 white eggs are incubated continuously by the female, during which time the male will provide her with food.[15][19] Unusually for a parrot, monk parakeet pairs occasionally have helper individuals, often grown offspring, which assist with feeding the young (see kin selection).[citation needed]

Monk parakeets have an average lifespan in their natural environment of 6 years.[20] However, birds in captivity can reach 10 - 20 years.[21][22]

Monk parakeets probably have individual voice prints that allow them to recognize each other, independently from the used call type.[23]

Native distribution

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In its native range, the monk parakeet is very common.[1] In Argentina, Brazil, and Uruguay, monk parakeets are regarded as major agricultural pests (as noted by Charles Darwin, among others).[24] Their population explosion in South American rural areas seems to be associated with the expansion of eucalyptus forestry for paper pulp production, which offers the bird the opportunity to build protected nests in artificial forests where ecological competition from other species is limited.[11][24]

Invasive species

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Flock in Parc de la Ciutadella
 
Feral in Spain
 
Quaker in Ga'ash

Feral populations have been recorded in several regions of Europe:[1]

These populations are not equally large. It is estimated that monk parakeets in Spain account for more than 80% of Europe's feral population.[26] Monk parakeet populations have previously been reported in Denmark,[25] Germany,[25][27] Austria,[25] and Czechia,[25] but failed to establish; the relatively colder weather in these countries likely contributes to these failed invasions.[26]

Invasive populations also exist elsewhere in the world:

Monk parakeets have previously escaped captivity in Japan, but failed to establish sustainable populations.[33] As it is an open-woodlands species, it adapts readily to urban areas.

In both their native South America, as well as areas where they have been introduced, monk parakeets are among the most destructive birds for crops.[34][35][36] Several countries have implemented measures to control the spread of feral populations; nest removal is a common practice in the United States,[30] and the United Kingdom's Department for the Environment, Food and Rural Affairs is planning to remove monk parakeet colonies, citing threats to infrastructure and potential crop damage.[37]

Feral populations are often descended from very small founder populations.[citation needed] Being as social and intelligent as they are, monk parakeets develop some cultural traditions, namely vocal dialects that differ between groups.[citation needed] In populations descended from a large number of birds, a range of "dialects" exists. If the founder population is small, however, a process similar to genetic drift may occur if prominent founders vocalize in an unusual "dialect", with this particular way of vocalizing becoming established in the resulting feral colony. For example, no fewer than three different "dialects" occur among the feral monk parrots of the Milford, Connecticut, metropolitan area.[38]

Brazil

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The species has in recent years expanded its range in Brazil, where a self-sustaining population occurs in the downtown area of Rio de Janeiro. Since this population occurs far from the bird's original range in Brazil – it was only found in the far south and southwest – it is most probably a consequence of escapees from the pet trade. In Rio de Janeiro, the bird can be easily seen at the Aterro do Flamengo gardens – where it nests on palm trees and feeds on their fruit; the Rio birds seem to favor nesting amid the leaves of coconut palm trees, and in the vicinity of the neighboring domestic flight terminal, the Santos Dumont Airport and in the gardens of Quinta da Boa Vista, where communal nests roughly 1 m in diameter have been seen.[39] In Santa Catarina State, probable escapees have been reported on occasion for quite some time, and a feral population seems to have established itself in Florianópolis early in the first decade of the 21st century when birds were observed feeding right next to the highway in the Rio Vermelho-Vargem Grande area.[12]

Mexico

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Two Quakers in Chihuahua City

The monk parakeet was first recorded in Mexico City between 1994 - 1995.[40] As of 2015, monk parakeets have been reported in 97 Mexican cities, and in all regions of the country.[40]

Established nesting populations exist in Mexico City and Oaxaca.[41] A small but growing population has also been established in the southern part of the city of Puebla, in the surroundings of the city's aviary, which they are known to visit frequently, and where they can often be seen clinging to the outer side of its mesh walls.[citation needed]

Following a 2008 ban on the capture and sale of native parrot species, the legal pet market pivoted to the sale of monk parakeets, which likely increased the number of escapees and subsequent feral populations.[40][41] Sometimes, the head and breast feathers of monk parakeets are dyed yellow to deceive uninformed buyers, mimicking the endangered yellow-headed amazon.[citation needed]

United States

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Thousands of monk parakeets were imported to the United States between the 1960s and the 1980s as pets.[42] Many escaped or were intentionally released, and populations were allowed to proliferate. By the early 1970s, M. monachus was established in seven states, and by 1995, it had spread to eight more. In Florida alone, estimates range from 150,000 to 500,000.[43] Austin, Dallas, and Houston, Texas, also have thriving monk parakeet populations.[44][45][46]

As one of the few temperate-zone parrots, the monk parakeet is able to survive cold climates (partly because they build communal nests about heat-producing electrical equipment atop utility poles), and colonies exist as far north as New York City, Chicago, and Portland, Oregon.[20] Edgewater, New Jersey has had a colony since 1980.[47] This hardiness makes this species second only to the rose-ringed parakeet among parrots as a successful introduced species.[citation needed]

New York State

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Pair of monk parakeets in Green-Wood Cemetery, Brooklyn, NY

In 2012, a pair of monk parakeets attempted nesting in Watervliet, New York, about 240 km (150 mi) north of New York City, near Albany, New York.[48] Prior to egg-laying, one bird was captured and the nest eventually was removed due to concerns that the nest built adjacent to an electrical transformer created a fire hazard.[49]

They have also found a home in Brooklyn, and Queens, New York, notably in Green-Wood Cemetery, after an accidental release at John F. Kennedy Airport in the 1960s.[50] The grounds crew initially tried to destroy the nests at the entrance gate, but no longer do so because the presence of the parrots has reduced the number of pigeons nesting within it.[citation needed] The management's decision was based on a comparative chemical analysis of pigeon feces (which destroy brownstone structures) and monk parakeet feces (which have no ill effect).[citation needed] Brooklyn College has a monk parakeet as an "unofficial" mascot in reference to the colony of the species that lives in its campus grounds. It is featured on the masthead of the student magazine.[citation needed] Several stories exist on the parakeets' introduction to the city, though their arrival is agreed to have been in the 1960s, following importation from Argentina.[51] They thrive in Brooklyn and Queens due to their preference for nesting in utility poles; populations have not expanded to Manhattan because of the borough's underground wiring.[51]

Chicago

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The population in Chicago is estimated to be at 1,000 birds, with healthy colonies located in several of the city's parks.[52] Parrot origin theories include a University of Chicago experiment gone awry,[53] an overturned truck on its way to a pet store,[53] escaped birds from a holding pen at O'Hare Airport[52] or released / escaped pets.[52] According to University of Chicago ornithologist Dr. Stephen Pruett-Jones, "They got here through the pet trade and the pet trade really peaked in the mid- to late 1960s."[53]

The first documented parrot nest in Chicago dates to 1973.[53] The species continues to thrive despite several unusually harsh winters that occurred during the 1980s and in 2014.[52] Various attempts to remove them were made over the years, most of which were resisted by a group of Hyde Park residents, including Mayor Harold Washington.[54] The birds are generally welcomed in the city, especially by bird watchers, and were the subject of a 2012 ornithological study.[52]

Europe

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A flock in Santa Ponsa

In Spain, monk parakeets can be seen in Madrid, Barcelona, Cadiz, Seville, Torremolinos, Málaga, Nerja, Valencia, Tarragona, Roquetas de Mar (Andalusia), Zaragoza, the Canary Islands, and Majorca in the Balearic Islands. They were first seen around 1975. In Madrid, they especially frequent the Ciudad Universitaria (Complutense University campus) and Casa de Campo park. They are a common sight in Barcelona parks, often as numerous as pigeons. They form substantial colonies in Parc de la Ciutadella, Parc de la Barceloneta, and in smaller city parks such as Jardins Josep Trueta in Poble Nou, with a colony as far north as Empuriabrava. They are more frequent in watered urban parks with grass areas and palm trees, near to a river or the sea. The monk parakeet, as an invasive species, has become a problem to local fauna such as pigeons and sparrows, but not yet so harmful to magpies. Parakeets have also caused trouble to agriculture near the cities. Spain has outlawed the possession, selling, breeding, and trafficking of monk parakeets since 2013.[55] Madrid has the greatest population of monk parakeets in Europe, with 10,800 parakeets as of June 2015.[56] A population estimate model projected the population of monk parakeets in Barcelona to be 5277 in 2015.[57] Between 2013 and 2021, the monk parakeet population in Seville increased from 1200 to 6300 individuals.[58]

In Greece, monk parakeets have established breeding colonies in the National Garden, Athens.[59]

The United Kingdom population in 2011 is believed to be around 150, in the Home Counties region. The Department for the Environment, Food and Rural Affairs announced plans in 2011 to control them, countering the threat to infrastructure, crops, and native British wildlife by trapping and rehoming, removing nests, and shooting when necessary.[60]

Groups of monk parakeets can be found in the Belgian capital city Brussels and its surrounding areas. They have been living in the wild at least since the 1970s.[61]

Populations in Germany, Czech Republic, Austria, and Denmark were once reported, but these seem to have been extirpated. Other populations in the U.K., France, and the Netherlands have also similarly declined into extirpation.[61]

As pets

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Monk parakeets are highly intelligent, social birds. Those kept as pets routinely develop vocabularies of scores of words and phrases.[62] Due to this early speaking ability, it is overtaking the cockatiel as the favorite bird to teach to talk.[citation needed] Another contributing factor to growing popularity is that this bird has a shorter lifespan and lower price[citation needed] than African grey parrots.

Because of monk parakeets' listing as an agricultural pest and invasive species, the U.S. states of California,[63] Colorado,[64] Georgia,[65] Kansas,[66] Kentucky,[67] Hawaii,[68] Maine,[69] New Jersey,[70] Pennsylvania,[71] Tennessee,[72] Wisconsin,[73] and Wyoming,[74] as well as Western Australia[75] outlaw their sale and ownership. In Connecticut, one can own monk parakeets, but cannot sell or breed them. In New York and Virginia, one can own monk parakeets with banding and registration. In Rhode Island, an exotic animal possession permit is required for ownership.[76] In Ohio, owning one is legal if the bird's flight feathers are clipped or it is incapable of free flight.[77]

  •  
    Pet with blue mutation
  •  
    Pets with yellow mutation

References

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Further reading

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Information on monk parakeets as introduced species

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