The Micronesian imperial pigeon (''Ducula oceanica''), also known as the Micronesian pigeon, and Belochel is a species of

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

in the family

Columbidae Columbidae is a bird Family (biology), family consisting of doves and pigeons. It is the only family in the Order (biology), order Columbiformes. These are stout-bodied birds with small heads, relatively short necks and slender bills that in ...

(doves). It is found in

Palau Palau, officially the Republic of Palau, is an island country in the Micronesia subregion of Oceania in the western Pacific Ocean. The Republic of Palau consists of approximately 340 islands and is the western part of the Caroline Islands ...

, the

Caroline Islands The Caroline Islands (or the Carolines) are a widely scattered archipelago of tiny islands in the western Pacific Ocean, to the north of New Guinea. Politically, they are divided between the Federated States of Micronesia (FSM) in the cen ...

, the

Marshall Islands The Marshall Islands, officially the Republic of the Marshall Islands, is an island country west of the International Date Line and north of the equator in the Micronesia region of the Northwestern Pacific Ocean. The territory consists of 29 c ...

and

Nauru Nauru, officially the Republic of Nauru, formerly known as Pleasant Island, is an island country and microstate in the South Pacific Ocean. It lies within the Micronesia subregion of Oceania, with its nearest neighbour being Banaba (part of ...

. Its habitats include montane forests, secondary forests, forests on beaches, and mangroves. It is threatened by hunting and deforestation, and the IUCN has assessed it as a near-threatened species.

Taxonomy

The species was first described as ''Columba oceanica'' in 1826. The binomial authority was formerly considered to be Lesson & Garnot, but it is now given as Desmarest. Five subspecies are recognized: ''D. o. monacha'' in Palau and Yap, ''D. o. teraokai'' on Chuuk, ''D. o. townsendi'' on

Pohnpei Pohnpei (formerly known as Ponape or Ascension, from Pohnpeian: "upon (''pohn'') a stone altar (''pei'')") is an island of the Senyavin Islands which are part of the larger Caroline Islands group. It belongs to Pohnpei State, one of the fou ...

, ''D. o. oceanica'' on

Kosrae Kosrae ( ), formerly known as Kusaie or Strong's Island, is an island in the Caroline Islands archipelago, and States of Micronesia, state within the Federated States of Micronesia. It includes the main island of Kosrae, traditionally known as Ual ...

, and ''D. o. ratakensis'' in the

Description

The Micronesian imperial pigeon is about long and weighs . The head and neck are ashy grey. The back and wing coverts are dark green, reflecting dark blue. The

flight feather Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the tai ...

s are blackish, with a green gloss. The breast is light grey, and the vent is dark rufous. The tail is blackish above and dark brown below. The beak is slaty black, and the

cere The beak, bill, or Rostrum (anatomy), rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for pecking, wikt:grasp#Verb, grasping, and holding (in wikt:probe ...

is black. The eyes are reddish brown, and the feet are purplish red. The female and the juvenile birds are darker. The subspecies are distinguished by their size and the colour of their heads. This species of bird makes many different types of calls, which can sound like barking, cooing, or moaning. It can probably fly pretty well.

Distribution and habitat

The Micronesian imperial pigeon is found in the Marshall Islands, Yap, Chuuk, Pohnpei and Kosrae of Micronesia, Nauru, Kiribati and Palau. The populations on many of the Marshall Islands are probably extinct. On Pohnpei and Kosrae, it mostly lives in the mountains. In areas where it is not hunted, it is found in

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 on beaches, and

mangrove A mangrove is a shrub or tree that grows mainly in coastal saline water, saline or brackish water. Mangroves grow in an equatorial climate, typically along coastlines and tidal rivers. They have particular adaptations to take in extra oxygen a ...

s. It also occurs in coconut plantations. The species also occurred once in the

Mariana Islands The Mariana Islands ( ; ), also simply the Marianas, are a crescent-shaped archipelago comprising the summits of fifteen longitudinally oriented, mostly dormant volcanic mountains in the northwestern Pacific Ocean, between the 12th and 21st pa ...

, where

Holocene The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene to ...

subfossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

remains are found.

Behaviour

This pigeon is mostly solitary, usually observed in the canopy. It eats fruits and fleshy seeds. Its calls include a deep-throated bark ', a moan, and mellow coos. Almost nothing is known about its breeding. The breeding season is probably the entire year.

Status

A 2005 survey in Palau found that, on

Babeldaob Babeldaob (also Babelthuap) is the largest island in the island nation of Palau. It is in the western Caroline Islands, and the second largest island (after Guam) in the Micronesia region of Oceania. Palau's capital, Ngerulmud, is located on Babel ...

and the

Rock Islands The Rock Islands of Palau, also called ''Chelbacheb'', are a collection of several hundred small limestone or coral uprises in the Southern Lagoon of Palau between Koror and Peleliu, now an incorporated part of Koror State. There are between ...

, the species had declined but was still common. It was rare on

Peleliu Peleliu (or Beliliou) is an island in the island nation of Palau. Peleliu, along with two small islands to its northeast, forms one of the sixteen states of Palau. The island is notable as the location of the Battle of Peleliu in World War II. ...

and was not recorded on

Angaur , or in Palauan, is an island and state in the Island country, island nation of Palau. History Angaur was traditionally divided among some eight clans. Traditional features within clan areas represent important symbols giving identity to fam ...

. A 2006–2007 survey estimated that there were 75–100 individuals on Nauru. The number of individuals that monitoring stations observed decreased from 2005 to 2010. The population on the

Majuro Atoll Majuro (; Marshallese: ' ) is the capital and largest city of the Marshall Islands. It is also a large coral atoll of 64 islands in the Pacific Ocean. It forms a legislative district of the Ratak (Sunrise) Chain of the Marshall Islands. The at ...

of the Marshall Islands was estimated at 80 in 2011, after a recovery programme of the Marshall Islands Conservation Society. The Micronesian imperial pigeon is hunted, possibly causing the population decline on Palau and Nauru. It is also threatened by deforestation. Because of these threats, the population is probably declining. The

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...

has therefore assessed the species as Vulnerable.

References

{{Taxonbar, from=Q1264191

Micronesian imperial pigeon The Micronesian imperial pigeon (''Ducula oceanica''), also known as the Micronesian pigeon, and Belochel is a species of bird in the family Columbidae (doves). It is found in Palau, the Caroline Islands, the Marshall Islands and Nauru. Its habit ...

Birds of Micronesia Near threatened animals Near threatened biota of Oceania

Taxonomy articles created by Polbot