Socotra cormorant

Last updated

Socotra cormorant
Socotra Cormorant.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Suliformes
Family: Phalacrocoracidae
Genus: Phalacrocorax
Species:
P. nigrogularis
Binomial name
Phalacrocorax nigrogularis
Sokotramap.jpg
Synonyms

Anacarbo nigrogularis

The Socotra cormorant (Phalacrocorax nigrogularis) is a threatened species of cormorant that is endemic to the Persian Gulf and the south-east coast of the Arabian Peninsula. [2] It is also sometimes known as the Socotran cormorant or, more rarely, as the Socotra shag. Individuals occasionally migrate as far west as the Red Sea coast. Despite its name, it was only confirmed in 2005 that it breeds on the Socotra islands in the Indian Ocean. [3]

The Socotra cormorant is an almost entirely blackish bird with a total length of about 80 centimetres (31 in). [3] In breeding condition, its forecrown has a purplish gloss and its upperparts have a slaty-green tinge, there are a few white plumes around the eye and neck and a few white streaks at the rump. Its legs and feet are black and its gular skin blackish. All these deviations from pure black are less marked outside the breeding season.

There is little information on this species' foraging or diet. Like all cormorants its dives for its food. Older reports suggest that it can stay submerged for up to 3 minutes, which is high for a cormorant and suggests that it would be capable of deep diving. However, there are also reports of foraging in flocks, and this is more usually seen in cormorants that feed in mid-water.

The birds are highly gregarious, with roosting flocks of 250,000 having been reported, and flocks of up to 25,000 at sea.

Some authors, such as Paul Johnsgard, place this species, along with a number of other related cormorants, in a genus Leucocarbo .

Since 2000, this species has been listed as Vulnerable on the IUCN Red List, on the grounds of its small number of breeding localities and ongoing rapid decline. [1] The decline is caused by coastal development, disturbance and marine pollution near its nesting colonies; in 2000 it was estimated that the world population was about 110,000 breeding pairs or 330,000–500,000 individual birds. [1] The only protected nesting colony in the Persian Gulf is one of about 30,000 pairs on the Bahraini Hawar Islands off the coast of Qatar, and this is a Ramsar Convention listed site. [4] Of the remaining 13 colonies (9 different locations), the Hawar colony is the largest. [1] In the northern part of its range alone, about 12 colonies are known to have disappeared since the 1960s. [3] The birds may also be affected by oil pollution at sea. During the First Gulf War, images of badly oiled cormorants from the Gulf were regularly shown in the western media, and although the great cormorant is also found in the Persian Gulf, it is likely that many of these were Socotra cormorants.

In 2012, the Environment Agency – Abu Dhabi (EAD) monitored wild birds throughout Abu Dhabi at nearly 60 sites and recorded 420 species from 60 families. Nearly 12,000 breeding pairs of the globally threatened Socotra Cormorant were recorded at five to six small islands in the Emirate.

The Socotra cormorant is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.

Related Research Articles

<span class="mw-page-title-main">Brandt's cormorant</span> Species of bird

Brandt's cormorant is a strictly marine bird of the cormorant family of seabirds that inhabits the Pacific coast of North America. It ranges, in the summer, from Alaska to the Gulf of California, but the population north of Vancouver Island migrates south during the winter. Its specific name, penicillatus is Latin for a painter's brush, in reference to white plumes on its neck and back during the early breeding season. The common name honors the German naturalist Johann Friedrich von Brandt of the Academy of Sciences at St. Petersburg, who described the species from specimens collected on expeditions to the Pacific during the early 19th century.

<span class="mw-page-title-main">Double-crested cormorant</span> Species of bird

The double-crested cormorant is a member of the cormorant family of water birds. It is found near rivers and lakes and in coastal areas and is widely distributed across North America, from the Aleutian Islands in Alaska down to Florida and Mexico. Measuring 70–90 cm (28–35 in) in length, it is entirely black except for a bare patch of orange-yellow facial skin and some extra plumage that it exhibits in the breeding season when it grows a double crest in which black feathers are mingled with white. Five subspecies are recognized. It mainly eats fish and hunts by swimming and diving. Its feathers, like all cormorants, are not waterproof, and it must dry them out after spending time in the water. Once threatened by the use of DDT, the numbers of this bird have increased markedly in recent years.

<span class="mw-page-title-main">Pelagic cormorant</span> Species of bird

The pelagic cormorant, also known as Baird's cormorant or violet-green cormorant, is a small member of the cormorant family Phalacrocoracidae. Analogous to other smallish cormorants, it is also called the pelagic shag occasionally. This seabird lives along the coasts of the northern Pacific; during winter it can also be found in the open ocean. Pelagic cormorants have relatively short wings due to their need for economical movement underwater, and consequently have the highest flight costs of any bird.

<span class="mw-page-title-main">Great cormorant</span> Species of bird

The great cormorant, known as the black shag or kawau in New Zealand, formerly also known as the great black cormorant across the Northern Hemisphere, the black cormorant in Australia, and the large cormorant in India, is a widespread member of the cormorant family of seabirds. The genus name is Latinised Ancient Greek, from φαλακρός and κόραξ, and carbo is Latin for "charcoal".

<span class="mw-page-title-main">European shag</span> Species of bird

The European shag or common shag is a species of cormorant. It is the only member of the monotypic genus Gulosus. It breeds around the rocky coasts of western and southern Europe, southwest Asia and north Africa, mainly wintering in its breeding range except for the northernmost birds. In Britain this seabird is usually referred to as simply the shag. The scientific genus name derives from the Latin for glutton. The species name aristotelis commemorates the Greek philosopher Aristotle.

<span class="mw-page-title-main">Eurasian spoonbill</span> Species of bird

The Eurasian spoonbill, or common spoonbill, is a wading bird of the ibis and spoonbill family Threskiornithidae. The genus name Platalea is from Latin and means "broad", referring to the distinctive shape of the bill, and leucorodia is from Ancient Greek leukerodios "spoonbill", itself derived from leukos, "white" and erodios "heron". In England it was traditionally known as the "shovelard", a name later used for the Northern Shoveller.

<span class="mw-page-title-main">Australian pied cormorant</span> Species of bird

The Australian pied cormorant, also known as the pied cormorant, pied shag, or great pied cormorant, is a medium-sized member of the cormorant family. It is found around the coasts of Australasia. In New Zealand, it is usually known either as the pied shag or by its Māori name of kāruhiruhi. Older sources may refer to it as the "yellow-faced cormorant".

<span class="mw-page-title-main">Spotted shag</span> Species of bird

The spotted shag or pārekareka is a species of cormorant endemic to New Zealand. Though originally classified as Phalacrocorax punctatus, it is sufficiently different in appearance from typical members of that genus that for a time it was placed in a separate genus, Stictocarbo, along with a similar species, the Pitt shag. Subsequent genetic studies show that the spotted shag's lineage is nested within the typical shags.

<span class="mw-page-title-main">Little cormorant</span> Species of bird

The little cormorant is a member of the cormorant family of seabirds. Slightly smaller than the Indian cormorant it lacks a peaked head and has a shorter beak. It is widely distributed across the Indian Subcontinent and extends east to Java, where it is sometimes called the Javanese cormorant. It forages singly or sometimes in loose groups in lowland freshwater bodies, including small ponds, large lakes, streams and sometimes coastal estuaries. Like other cormorants, it is often found perched on a waterside rock with its wings spread out after coming out of the water. The entire body is black in the breeding season but the plumage is brownish, and the throat has a small whitish patch in the non-breeding season. These birds breed gregariously in trees, often joining other waterbirds at heronries.

<span class="mw-page-title-main">Ashy storm petrel</span> Species of bird

The ashy storm petrel is a small, scarce seabird of the storm petrel family Hydrobatidae. It breeds colonially on islands off the coasts of California and Mexico, and is one of six species of storm petrel that live and feed in the rich California Current system.

<span class="mw-page-title-main">Flightless cormorant</span> Species of flightless bird endemic to the Galapagos islands

The flightless cormorant, also known as the Galapagos cormorant, is a cormorant endemic to the Galapagos Islands, and an example of the highly unusual fauna there. It is unique in that it is the only known cormorant that has lost the ability to fly. It was placed in its own genus, Nannopterum, but then was later placed with most of the other cormorants in the genus Phalacrocorax. A 2014 study supported reclassifying it and two other American cormorant species back into Nannopterum. The IOC followed this classification in 2021.

<span class="mw-page-title-main">Cape cormorant</span> Species of bird

The Cape cormorant or Cape shag is a bird endemic to the southwestern coasts of Africa.

<span class="mw-page-title-main">Rock shag</span> Species of bird

The rock shag, also known as the Magellanic cormorant, is a marine cormorant found around the southernmost coasts of South America. Its breeding range is from around Valdivia, Chile, south to Cape Horn and Tierra del Fuego, and north to Punta Tombo in Argentina. In winter it is seen further north, with individuals reaching as far as Santiago, Chile on the west coast and Uruguay on the east. The birds also breed around the coasts of the Falkland Islands.

<span class="mw-page-title-main">Black-faced cormorant</span> Species of bird

The black-faced cormorant, also known as the black-faced shag, is a medium-sized member of the cormorant family. Upperparts, including facial skin and bill, are black, with white underparts. It is endemic to coastal regions of southern Australia.

<span class="mw-page-title-main">Crowned cormorant</span> Species of bird endemic to Namibia and South Africa

The crowned cormorant or kuifkopduiker, 'Fringe-head diver', is a small cormorant that is endemic to the waters of the cold Benguela Current of southern Africa. It is an exclusively coastal species and is not found more than 10 km (6 mi) away from land. This species is related to the reed cormorant, and was formerly considered to the same species.

<span class="mw-page-title-main">Red-legged cormorant</span> Species of bird

The red-legged cormorant, also known as the red-legged shag, red-footed cormorant, red-footed shag, Gaimard's cormorant and grey cormorant, is a species of cormorant resident to the coastline of South America. It is the only member of the genus Poikilocarbo. It is non-colonial unlike most seabirds. The red-legged cormorant has not been observed wing-spreading, which is unusual among cormorant species.

<span class="mw-page-title-main">Chatham shag</span> Species of bird

The Chatham shag, also known as the Chatham Island shag, is a species of bird in the cormorant and shag family, Phalacrocoracidae. It is endemic to the Chatham Islands of New Zealand. For a long time the species was placed in the genus Phalacrocorax; today it is mostly placed with the other blue-eyed shags of New Zealand and Antarctica in the genus Leucocarbo. Its closest relative is the Otago shag of South Island.

<span class="mw-page-title-main">Kerguelen shag</span> Species of bird

The Kerguelen shag is a species of cormorant endemic to the Kerguelen Islands in the southern Indian Ocean, one of the most isolated places on Earth. Many authorities consider it a subspecies of the imperial shag.

<span class="mw-page-title-main">Macquarie shag</span> Species of cormorant

The Macquarie shag, Macquarie Island shag or Macquarie Island cormorant, is a marine cormorant native to Macquarie Island in the Southern Ocean, about halfway between Australia and Antarctica.

<span class="mw-page-title-main">Persian Gulf desert and semi-desert</span>

The Persian Gulf desert and semi-desert ecoregion covers the desert coastal plain of the northwest Persian Gulf, that is, on the northeast Arabian Peninsula, from Kuwait in the north to a small coastal sector in the United Arab Emirates to the southeast.

References

  1. 1 2 3 4 BirdLife International (2019). "Phalacrocorax nigrogularis". IUCN Red List of Threatened Species . 2019: e.T22696802A155525071. doi: 10.2305/IUCN.UK.2019-3.RLTS.T22696802A155525071.en . Retrieved 12 November 2021.
  2. "Persian Gulf Desert and Semi-desert." Robert Warren Howarth (ed.), Biomes & Ecosystemsvol. 3. Ipswich, MA: Salem Press, pp. 1000-1002.
  3. 1 2 3 BirdLife International (2011). Species Factsheet: Phalacrocorax nigrogularis. Retrieved 5 October 2011.
  4. Bahrain Bird Report. Socotra Cormorant. Retrieved 5 October 2011.