Lord Derby's parakeet

Lord Derby's parakeet
A pair - male on left and female on right
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Psittaciformes
Superfamily: Psittacoidea
Family: Psittaculidae
Subfamily: Psittaculinae
Tribe: Psittaculini
Genus: Psittacula
Species: P. derbiana
Binomial name
Psittacula derbiana
(Fraser, 1852)

The Lord Derby's parakeet (Psittacula derbiana), also known as Derbyan parakeet, is a monotypic[2] parrot species, which is confined to small pocket of moist evergreen forest in the hills of the Indian state of Arunachal Pradesh and the adjoining parts of Tibet. The species suffers from poaching for the illegal wildlife trade and fetches a high price in the black market. It is perhaps the rarest of all species of Psittacula in mainland Asia. As of the 2011 IUCN Red List of Threatened Species its status was updated from Least Concern to Near Threatened. The adult male and female are easily distinguished because they have different beak colours and slightly different plumage.

The name of this bird commemorates Edward Stanley, 13th Earl of Derby.

Lord Derby's parakeets feed on fruits, berries, seeds, and leaf buds, occasionally foraging in gardens and fields.

Description

A pair at Wilhelma Zoo, Germany

Lord Derby's parakeets average 20 inches (50 centimeters) in length and are sexually dimorphic. They have a mostly green plumage over their dorsal surface (i.e. from behind), black lores and lower cheeks, a bluish-purple crown and pale yellow eyes. The throat, breast, abdomen and under-wing coverts are greyish blue to lavender. The thighs and vent area are yellowish green with blue edging on some of the feathers. The tail feathers are shades of green, some edged with blue. Male birds have a red upper mandible with a yellow tip, while the lower mandible is black. The females have an all-black beak.

Immature Lord Derby's parakeets are duller in colour than the adults. Juvenile birds have green crowns, orange-red upper and lower mandible (beak), and their irises are dark and do not lighten until they reach maturity between two and three years of age.

Sexual dimorphism

Reproduction

Juvenile playing with a bolt on a cage in Tibet. Juveniles have dark irises and both the upper and lower mandible are orange-red.

Breeding season usually begins between April and June. The female lays a clutch of two to four eggs (36.1x27.7 mm (1.42 x 1.09 ins) in nest holes of trees. The young hatch after an incubation period of about 23 days and will fledge after 8 to 9 weeks.

References

  1. ↑ BirdLife International (2012). "Psittacula derbiana". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  2. ↑ "Zoological Nomenclature Resource: Psittaciformes (Version 9.022)". www.zoonomen.net. 2009-03-31.

External links

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