Spectacled cormorant | |
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Illustration by Joseph Wolf | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Suliformes |
Family: | Phalacrocoracidae |
Genus: | Urile |
Species: | †U. perspicillatus |
Binomial name | |
†Urile perspicillatus (Pallas, 1811) | |
Synonyms | |
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The spectacled cormorant or Pallas's cormorant (Urile perspicillatus) [2] is an extinct marine bird of the cormorant family of seabirds that inhabited Bering Island and possibly other places in the Commander Islands and the nearby coast of Kamchatka in the far northeast of Russia. [1] The modern distribution was shown to be a relict of a wider prehistoric distribution in 2018 when fossils of the species from 120,000 years ago were found in Japan. It is the largest species of cormorant known to have existed. [3]
It was formerly classified in the genus Phalacrocorax , but in 2021, the IOC reclassified it and several other Pacific cormorant species into the genus Urile , based on a 2014 study that supported reclassifying the Brandt's, red-faced, and pelagic cormorants into that genus. Although the spectacled cormorant was not mentioned in the 2014 study and its current taxonomic position is unresolvable by the current phylogenies, it was also reclassified into Urile based on its perceived relatedness to those species. [4] [5]
The species was first identified by Georg Wilhelm Steller in 1741 on Vitus Bering's disastrous second Kamchatka expedition. He described the bird as large, clumsy and almost flightless – though it was probably reluctant to fly rather than physically unable – and wrote "they weighed 12–14 pounds, so that one single bird was sufficient for three starving men." Though cormorants are normally notoriously bad-tasting, Steller says that this bird tasted delicious, particularly when it was cooked in the way of the native Kamchadals, who encased the whole bird in clay, buried it, and baked it in a heated pit. [6]
With a body mass estimated to be from 3.5 to 6.8 kg (7.7 to 15.0 lb) and a length up to around 100 cm (39 in), the spectacled cormorant was rather larger than all other known cormorants. [7] [8] In a similar fashion to the extant flightless cormorant, which may have rivaled it in length but not weight, the spectacled cormorant is thought to have at least largely lost the power of flight which is borne out by the reduced sternum and wing chord of museum specimens. [9] [10] This species was largely glossy black in color with a reported greenish gloss that may have been fairly vivid in bright light.
A contrasting large white patch could be seen on its lower flanks just above the legs. Like other cormorants, they had small patches of bare skin about the face including a small gular patch and a small amount of bare skin around the eyes; these areas usually appeared to have been dull-yellow or grayish in hue, but during breeding stages, they may have changed to a bright orangey-reddish hue. [10] During breeding stages, they also had a prominent crest on their head. The bare skin around the eyes, as well as the crest, were not present in females. [11]
Apart from the fact that it fed on fish, almost nothing else is known about the life history of this bird. The population declined quickly after further visitors to the area started collecting the birds for food and feathers. Their reports of profitable whaling grounds and large populations of Arctic foxes and other animals with valuable pelts led to a massive influx of whalers and fur traders into the region; the last birds were reported to have lived around 1850 on Kamen Ariy (Russian : Камень Арий [12] ) islet, off the northwestern tip of Bering Island.
Only seven known specimens are currently preserved in public collections, with all specimens collected and given away by the same individual. [11] None of these specimens are available on public display.
A presumed prehistoric record from Amchitka Island, Alaska, [13] is based on misidentification of double-crested cormorant remains. [14]
The great auk, also known as the penguin or garefowl, is a species of flightless alcid that became extinct in the mid-19th century. It was the only modern species in the genus Pinguinus. It is unrelated to the penguins of the Southern Hemisphere, which were named for their resemblance to this species.
Auks or alcids are a group of birds of the family Alcidae in the order Charadriiformes. The alcid family includes the murres, guillemots, auklets, puffins, and murrelets. The family contains 25 extant or recently extinct species that are divided into 11 genera. Auks are found throughout the Northern Hemisphere.
The Bering Sea is a marginal sea of the Northern Pacific Ocean. It forms, along with the Bering Strait, the divide between the two largest landmasses on Earth: Eurasia and the Americas. It comprises a deep water basin, which then rises through a narrow slope into the shallower water above the continental shelves. The Bering Sea is named after Vitus Bering, a Danish-born Russian navigator, who, in 1728, was the first European to systematically explore it, sailing from the Pacific Ocean northward to the Arctic Ocean.
Steller's sea cow is an extinct sirenian described by Georg Wilhelm Steller in 1741. At that time, it was found only around the Commander Islands in the Bering Sea between Alaska and Russia; its range extended across the North Pacific during the Pleistocene epoch, and likely contracted to such an extreme degree due to the glacial cycle. It is possible indigenous populations interacted with the animal before Europeans. Steller first encountered it on Vitus Bering's Great Northern Expedition when the crew became shipwrecked on Bering Island. Much of what is known about its behavior comes from Steller's observations on the island, documented in his posthumous publication On the Beasts of the Sea. Within 27 years of its discovery by Europeans, the slow-moving and easily-caught mammal was hunted into extinction for its meat, fat, and hide.
Bering Island is located off the Kamchatka Peninsula in the Bering Sea.
Georg Wilhelm Steller was a German-born naturalist and explorer who contributed to the fields of biology, zoology, and ethnography. He participated in the Great Northern Expedition (1733–1743) and his observations of the natural world helped the exploration and documentation of the flora and fauna of the North Pacific region.
Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) adopted a consensus taxonomy of seven genera. The great cormorant and the common shag are the only two species of the family commonly encountered in Britain and Ireland and "cormorant" and "shag" appellations have been later assigned to different species in the family somewhat haphazardly.
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.
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.
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.
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.
The pigeon guillemot is a species of bird in the auk family, Alcidae. One of three species in the genus Cepphus, it is most closely related to the spectacled guillemot. There are five subspecies of the pigeon guillemot; all subspecies, when in breeding plumage, are dark brown with a black iridescent sheen and a distinctive wing patch broken by a brown-black wedge. Its non-breeding plumage has mottled grey and black upperparts and white underparts. The long bill is black, as are the claws. The legs, feet, and inside of the mouth are red. It closely resembles the black guillemot, which is slightly smaller and lacks the dark wing wedge present in the pigeon guillemot.
Steller's eider is a migrating Arctic diving duck that breeds along the coastlines of eastern Russia and Alaska. It is the rarest, smallest, and fastest flying of the eider species.
The Commander Islands, Komandorski Islands, or Komandorskie Islands are a series of islands in the Russian Far East, a part of the Aleutian Islands, located about 175 km (109 mi) east of the Kamchatka Peninsula in the Bering Sea. Treeless and sparsely populated, the islands consist of Bering Island, Medny Island and fifteen islets and rocks. The largest of the latter are Tufted Puffin Rock (Kamen Toporkov or Ostrov Toporkov), 15 ha, and Kamen Ariy, which are between 3 km (1.9 mi) and 13 km (8.1 mi) west of the only settlement, Nikolskoye. Administratively, the Commanders compose the Aleutsky District of the Kamchatka Krai in Russia.
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.
The red-faced cormorant, red-faced shag or violet shag, is a bird species of the family Phalacrocoracidae.
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.
The order Suliformes is an order of birds recognised by the International Ornithologist's Union. Regarding the recent evidence that the traditional Pelecaniformes is polyphyletic, it has been suggested that the group be divided to reflect the true evolutionary relationships; a 2017 study indicated that they are most closely related to Otidiformes (bustards) and Ciconiiformes (storks).
Urile is a genus of birds in the family Phalacrocoracidae, commonly known as North Pacific cormorants. It contains 3 extant and 1 recently extinct species, all of which are or were found in the North Pacific Ocean.