The elegant imperial pigeon (''Ducula concinna''), also known as blue-tailed imperial-pigeon, is a large pigeon, with upperparts mainly dark blue-green in colour with an iridescent sheen. Head, neck and underparts are mostly pale grey, with red-brown undertail coverts.

Taxonomy and systematics

The elegant imperial pigeon was originally described as ''Carpophaga concinna'' by

Alfred Russel Wallace Alfred Russel Wallace (8 January 1823 – 7 November 1913) was an English naturalist, explorer, geographer, anthropologist, biologist and illustrator. He independently conceived the theory of evolution through natural selection; his 1858 pap ...

in 1865 based on specimens from the Watubela Islands.

Description

The elegant imperial pigeon is a large pigeon, measuring in length. The head, neck, and upper back are pale grey, with a pink tinge on the

nape The nape is the back of the neck. In technical anatomical/medical terminology, the nape is also called the nucha (from the Medieval Latin rendering of the Arabic , ). The corresponding adjective is ''nuchal'', as in the term ''nuchal rigidity'' ...

and back of the

crown A crown is a traditional form of head adornment, or hat, worn by monarchs as a symbol of their power and dignity. A crown is often, by extension, a symbol of the monarch's government or items endorsed by it. The word itself is used, parti ...

. The rest of the upperparts are shimmering dark green, while the top of the tail is purplish-blue, sometimes appearing black. The underparts are pale grey with a pink tinge, while the

undertail coverts A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or ''tectrices''), which cover other feathers. The coverts help to smooth airflow over the wings and tail. Ear coverts The ear coverts are small feathers behind t ...

are reddish-brown. The undersides of the tail and wing are black. The bill is black or bluish-grey, with a ring of white feathers at its base, the iris is golden, and the feet are pinkish-red to

crimson Crimson is a rich, deep red color, inclining to purple. It originally meant the color of the kermes dye produced from a scale insect, '' Kermes vermilio'', but the name is now sometimes also used as a generic term for slightly bluish-red col ...

. Both sexes are similar, but females have darker grey and pink colours. Juveniles are duller than adults.

Vocalisations

The elegant imperial pigeon's call is a loud, throaty, barking ''urrauw'', made at variable intervals. These are interspersed with low-pitched, loud, upslurred growls. These growls are often produced after another individual has given the bark.

Distribution and habitat

The elegant imperial pigeon inhabits small islands in

Wallacea Wallacea is a biogeography, biogeographical designation for a group of mainly list of islands of Indonesia, Indonesian islands separated by deep-water straits from the Asian and Australia (continent), Australian continental shelf, continental ...

and off

New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; , fossilized , also known as Papua or historically ) is the List of islands by area, world's second-largest island, with an area of . Located in Melanesia in the southwestern Pacific Ocean, the island is ...

. It has been recorded from the

Talaud Islands The Talaud Islands Regency () is a Regency (Indonesia), regency of North Sulawesi province, Indonesia. The Talaud Islands form an archipelago situated to the northeast of the Minahasa Peninsula, with a land area of 1,251.02 km2. It had a populati ...

, Sangihe, islands off southern

Sulawesi Sulawesi ( ), also known as Celebes ( ), is an island in Indonesia. One of the four Greater Sunda Islands, and the List of islands by area, world's 11th-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Min ...

, the southern

Maluku Islands The Maluku Islands ( ; , ) or the Moluccas ( ; ) are an archipelago in the eastern part of Indonesia. Tectonics, Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located in West ...

, and the eastern

Lesser Sundas The Lesser Sunda Islands (, , ), now known as Nusa Tenggara Islands (, or "Southeast Islands"), are an archipelago in the Indonesian archipelago. Most of the Lesser Sunda Islands are located within the Wallacea region, except for the Bali pr ...

from Romang to

Tanimbar The Tanimbar Islands (; ), also called ''Timur Laut'' (literally, "North East"; ), are a group of about 65 islands in the Maluku province of Indonesia. The largest and most central of the islands is Yamdena; others include Selaru to the sout ...

, east up to the

Aru Islands Aru or ARU may refer to: Education * Alpha Rho Upsilon, a defunct fraternity in the United States * Anglia Ruskin University, a university in England * Ardhi University, a Tanzanian public university Places * Aru Islands Regency, a group of i ...

. Vagrants have also been recorded from

Buru Buru (formerly spelled Boeroe, Boro, or Bouru) is the third largest island within the Maluku Islands of Indonesia. It lies between the Banda Sea to the south and Seram Sea to the north, west of Ambon Island, Ambon and Seram Island, Seram island ...

and Darwin, Australia. The elegant imperial pigeon inhabits

primary forest An old-growth forest or primary forest is a forest that has developed over a long period of time without Disturbance (ecology), disturbance. Due to this, old-growth forests exhibit unique ecological features. The Food and Agriculture Organizati ...

secondary forest A secondary forest (or second-growth forest) is a forest or woodland area which has regenerated through largely natural processes after human-caused Disturbance (ecology), disturbances, such as Logging, timber harvest or agriculture clearing, or ...

forest edge A woodland edge or forest edge is the transition zone (ecotone) from an area of woodland or forest to fields or other open spaces. Certain species of plants and animals are adapted to the forest edge, and these species are often more familiar to h ...

, and trees in cultivated areas. It mostly inhabits lowlands, but is sometimes found up to elevations of .

Behaviour and ecology

The elegant imperial pigeon is thought to migrate between small islands to look for food. One vagrant observed in Australia may have reached there with migrating Torresian imperial pigeons.

Diet

The elegant imperial pigeon feeds on fruit, and has been recorded feeding on young coconut fruit, ''

Ficus ''Ficus'' ( or ) is a genus of about 850 species of woody trees, shrubs, vines, epiphytes and hemiepiphytes in the family (biology), family Moraceae. Collectively known as fig trees or figs, they are native throughout the tropics with a few spe ...

'' figs, ''

Canarium ''Canarium'' is a genus of about 120 species of tropical and subtropical trees, in the family Burseraceae. They grow naturally across tropical Africa, south and southeast Asia, Indochina, Malesia, Australia and western Pacific Islands; includin ...

'' species, ''

Gnetum gnemon ''Gnetum'' is a genus of gymnosperms, the sole genus in the family Gnetaceae within the Gnetophyta. They are tropical evergreen trees, shrubs and lianas. Unlike other gymnosperms, they possess vessel elements in the xylem. Some species have be ...

'', fish poison trees (''Barringtonia asiatica''), Moluccan albizia (''Falcataria moluccana''), Bornean ironwood (''Eusideroxylon zwageri''), and Indonesian mahogany (''Toona sureni''). A vagrant in Australia was also observed feeding on

banyan A banyan, also spelled banian ( ), is a fig that develops accessory trunks from adjacent prop roots, allowing the tree to spread outwards indefinitely. This distinguishes banyans from other trees with a strangler habit that begin life as ...

and

palm trees The Arecaceae () is a family of perennial, flowering plants in the monocot order Arecales. Their growth form can be climbers, shrubs, tree-like and stemless plants, all commonly known as palms. Those having a tree-like form are colloquially ...

. Foraging flocks can contain up to 40 birds.

Breeding

On Damar, nest-building was observed in August, when two nests were found at heights of in primary evergreen forest.

References

External links

BirdLife Species Factsheet
{{Taxonbar, from=Q655595 elegant imperial pigeon Birds of Wallacea elegant imperial pigeon Endemic birds of Indonesia