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Description
Medium-sized, 35 cm.. long.
The Yellow-crested cockatoo (Cacatua sulphurea) It is distinguished by its long, thin yellow erectile crest, that curves forward, and extending upward, above the nape, when it folded. The front of his crown and main feathers crest, are white. The rest of your plumage It is also white, except in yellow suffusion ear-coverts, under the wings and in the innerwebs of the undertail-coverts. The bases of the hackles and underparts, They are yellowed; some birds show a slight yellow tone, particularly on chest and the belly. The bill It is black; eye ring pale bluish; irises dark brown; legs grey. The female is similar to the male but with the irises reddish and slightly smaller.
The young birds They show both sexes irises dark taupe, although females They begin to acquire the red coloration in the first year. The bill and legs immature are also lighter.
- Sound of the Yellow-crested cockatoo.
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Cacatua sulphurea abbotti
(Oberholser, 1917) – Similar to the parvula, but largest.
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Cacatua sulphurea citrinocristata
(Fraser, 1844) – Slightly larger than the nominal, with one crest orange & ear-coverts orange yellow. Additional research may provide a basis for improving this subspecies to a specific status..
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Cacatua sulphurea parvula
(Bonaparte, 1850) – Similar to the nominal species, but with the ear-coverts paler and less yellow on yellow feathers underparts. the size of the bill in this subspecies it increases clinically towards the west.
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Cacatua sulphurea sulphurea
(Gmelin, 1788) – Nominal.
Habitat:
Video – "Yellow-crested cockatoo" (Cacatua sulphurea) |
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They inhabit at the edges of the forest, wooded areas, farmland, cocoteros, semi-arid areas and forests until the 800 m (locally 1.200 m).
The Yellow-crested cockatoo usually they found in pairs or small groups of up to ten individuals, although they may meet in larger flocks to feed on fruit trees. They can form flocks with Eclectus Parrot (Eclectus roratus).
They tend to be noisy and visible, but can be difficult to spot when moving silently in the canopy, and they are more often in flight. The groups who leave their resting places in the montane forest areas frequently displace forage at lower altitudes including cultivated fields. Pairs may hover conspicuously above the forest canopy searching for fruitful trees, allowing a reasonably close approach when resting on a branch.
The crest It is generally stands when landing, or when an individual is making calls from a perch. Like most of the Cockatoos They enjoy a bath in the rain.
Reproduction:
Specimens of Yellow-crested cockatoo on the island of button in State reproductive during the months of September and October, although Nusa Tenggara the breeding It occurs in the months of April and May. The female It lays two or three white eggs in the hollow of a tree, and incubation lasts around 28 days with both parents participating. Chicks they leave the nest to 10 weeks and are dependent parent for about two months.
Food:
They feed in trees and soil. Its diet It includes seeds, corn (Zea mays) of cultivated fields, fruit, berries, egg yolks, flowers and nuts (including large coconuts (cocos nucifera)).
Distribution and status:
Size of its range (breeding/resident ): 1.360.000 km2
The Yellow-crested cockatoo They are confined Indonesian, where they can be seen in the lowlands Isla Celebes (virtually extinct in the north), islands in the Flores sea, in Nusa Tenggara and isolated islands Masalembu in the Java Sea.
introduced in Singapore and Hong Kong. The species is found in both wooded areas and cultivated and is scarce throughout its range. It is estimated that the world population total is less than 40.000 birds and is decreasing. Although populations of the nominal subspecies and of the subspecies parvula may still be close to 10.000 specimens, the citrinocristata subspecies It has an estimated population between 800 and 7.200 only individuals, having declined by 80% between the years 1986 and 1989, while the distinctive subspecies abbotti It is now represented by only nine individuals in nature.
Although habitat loss is clearly a factor in Sumba, where distribution appears to be linked to the extent of primary forest (is only about 15% the original forest), trade is the main threat to the species as a whole. Trade data show that exported almost 100.000 birds in years 1980-1992. The export citrinocristata subspecies It was banned in 1992 by local authorities, and 26 birds were confiscated in September of that year. There are probably at least 50 individuals of each subspecies in public collections and more than 2.000 in private aviculture, although the numbers for the subspecies abbotti They are unknown.
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Cacatua sulphurea abbotti
(Oberholser, 1917) – Masalembu Islands in the Java Sea, where it is rare with only 8-10 birds located during a search 1993
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Cacatua sulphurea citrinocristata
(Fraser, 1844) – Sumba, where it can be seen in the remaining forest around left, or east of the island, where it may still be locally common; an expedition of the Manchester Metropolitan University found it common in the remaining forest areas in 1990, with the greatest discovery of birds, a group of five birds, found in primary forest near Tabundung
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Cacatua sulphurea parvula
(Bonaparte, 1850) – Nusa Tenggara Islands, including Sumbawa, Komodo, where they are still relatively common, Rinca, Flowers, Pantar, Alor, Timor and Semau, records Bali and Java probably they refer to leaks; although formerly it was known Lombok and Nusa Penida, in the south-east of Bali, so in some records Bali / Java They may have involved wild birds
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Cacatua sulphurea sulphurea
(Gmelin, 1788) – The Celebes island – distributed below 500 m) and on the islands of the Flores sea, including Muna, button, Tukangbesi, Selayar, Kayuadi, Land Jampea, Kalao, Bonerate, Kalaotowa and Madu; introduced into Singapore. Nominal.
Conservation:
State of conservation ⓘ |
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critically endangered ⓘ (UICN)ⓘ
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• Current category of the Red List of the UICN: critically endangered.
• Population trend: Decreasing.
Its crashing fall It is almost entirely attributable to the unsustainable exploitation for domestic and international trade. Logging to the conversion of forests for agriculture as well as the use of pesticides for land and large-scale.
Justification of the population
Based on recent surveys in various parts of the range of the species, C. Trainor in some (2007) It has been estimated the world population in less than 7.000 individuals: 3.200-5.000 en Sumba (though perhaps only 562 in 2012, Burung Indonesia en preparación), 500 en Komodo, 200-300 en Timor Leste, 200-300 en Sulawesi, 20-50 in West Timor, 40-70 Flores, 50-100 en Sumbawa, 100 in Rinca and other 700 birds in total. The best data is located in the band 2.500-9.999 individuals, equivalent to 1.667-6.666 mature individuals, rounded here to 1.500-7.000 mature individuals.
"Yellow-crested cockatoo" in captivity:
The male Yellow-crested cockatoo It is especially aggressive with the female, sometimes to kill her. This phenomenon is known in many cockatoo species..
among the white cockatoos, this is somewhat difficult to breed in captivity. As a pet can be a formidable partner provided it has been raised for that purpose and to provide much attention.
It is very difficult for them to disconnect in the presence of their owners and entertain themselves without seeking continuous interaction.
Great ability to imitate human sound within the world of cockatoos.
Note: Because of its status, CRITICALLY ENDANGERED, only controlled captive breeding is recommended in an attempt to recover this species in the wild.
Alternative names:
– Yellow-crested Cockatoo, Lesser sulphur-crested cackatoo, Sulphur-crested Cockatoo (ingles).
– Cacatoès soufré, Petit Cacatoès à huppe jaune (French).
– Gelbwangenkakadu, Orangehaubenkakadu (German).
– Cacatua-de-crista-amarela (Portuguese).
– Cacatúa de Moño Naranja, Cacatúa Sulfúrea (español).
scientific classification:
– Order: Psittaciformes
– Family: Cacatuidae
– Genus: Cockatoo
– Scientific name: Cacatua sulphurea
– Citation: (Gmelin, JF, 1788)
– Protonimo: Psittacus sulphureus
Images Sulphur-crested Cockatoo:
Sources:
– Avibase
– Parrots of the World – Forshaw Joseph M
– Parrots A Guide to the Parrots of the World – Tony Juniper & Mike Parr
– Birdlife
– Photos:
(1) – Cacatua sulphurea by Charles Lam – Flickr
(2) – Citron-crested Cockatoo(Cacatua sulphurea citrinocristata) in the Walsrode Bird Park, Germany By Quartl (Own work) [CC BY-SA 3.0], via Wikimedia Commons
(3) – A Yellow-crested Cockatoo at Auckland Zoo, New Zealand By Ashleigh Thompson (originally posted to Flickr as Captain) [CC BY 2.0], via Wikimedia Commons
(4) – Cacatua sulphurea citrinocristata, Citron-crested Cockatoo. Photograph of upper body and crest By Ruth Rogers (originally posted to Flickr as Citron Cockatoo) [CC BY 2.0], via Wikimedia Commons
(5) – Citron-crested Cockatoo (Cacatua sulphurea citrinocristata). The glass between the camera and this parrot makes the picture just a little bit blurry By Alexander Tundakov (originally posted to Flickr as White Parrot) [CC BY 2.0], via Wikimedia Commons
(6) – Photo of Lesser Sulphur-crested Cockatoo (wings clipped) By Snowmanradio, with permission from Tropical Birdland, Leicestershire, England. (Own work) [GFDL or CC BY-SA 3.0], via Wikimedia Commons
(7) – Yellow-crested Cockatoo (Cacatua sulphurea) at the KOBE Oji Zoo by opencage.info
(8) – Lesser Sulphur-crested Cockatoo (wings clipped) By Snowmanradio, with permission from Tropical Birdland, Leicestershire, England. (Own work) [GFDL or CC BY-SA 3.0], via Wikimedia Commons
(9) – Yellow-crested Cockatoo (Cacatua sulphurea) by Darren – Flickr
(10) – Yellow-Crested Cockatoo, Cacatua sulphurea by Sek Keung Lo – Flickr
(11) – Cacatua sulphurea by Charles Lam – Flickr
(12) – Cacatua sulphurea by Charles Lam – Flickr
(13) – Cacatua sulphurea by Pichon Charles Lam – Flickr
(14) – A painting of a Yellow-crested Cockatoo, also known as the Lesser Sulphur-crested Cockatoo, (originally captioned «Plyctolophus sulphureus. Lesser Sulphur-crested Cockatoo») by Edward Lear 1812-1888. [Public domain], via Wikimedia Commons
– Sounds: (Xeno-canto)
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