Baird’s cormorant, Pelagic shag, Violet-green cormorant, Baird's cormorant
The pelagic cormorant (Urile pelagicus ), 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.
It was formerly classified in the genus Phalacrocorax, but a 2014 study supported reclassifying it and several other Pacific cormorant species into the genus Urile. The IOC followed this classification in 2021.
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DiurnalDiurnal animals are active during the daytime, with a period of sleeping or other inactivity at night. The timing of activity by an animal depends ...
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CarnivoreA carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of a...
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SemiaquaticSemiaquatic animals are those that are primarily or partly terrestrial but that spend a large amount of time swimming or otherwise occupied in wate...
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SeabirdSeabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, b...
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Pelagic birdsPelagic birds live on open seas and oceans rather than inland or around more restricted waters such as rivers and lakes. They feed on planktonic cr...
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AltricialAltricial animals are those species whose newly hatched or born young are relatively immobile. They lack hair or down, are not able to obtain food ...
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
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CongregatoryCongregatory animals tend to gather in large numbers in specific areas as breeding colonies, for feeding, or for resting.
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, b...
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Serial monogamySerial monogamy is a mating system in which a pair bonds only for one breeding season.
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Generally solitaryGenerally solitary animals are those animals that spend their time separately but will gather at foraging areas or sleep in the same location or sh...
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SocialFlocking birds are those that tend to gather to forage or travel collectively. Avian flocks are typically associated with migration. Flocking also ...
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MigratingAnimal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migrati...
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Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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starts withThe Pelagic cormorant of the Pacific Coast is a cormorant that is small and slender, and exclusively marine in habits, but preferring inshore areas. It is black, and its body has a glossy iridescent green with violet-bronze, and violet-purple on its neck. The breeding plumage includes white patches on the flank, red skin at the base of the bill, two head crests, and long white feathers on the neck and upper-back. This species may be solitary when feeding but gregarious during other times, when groups perch together on rocks near the water, holding their wings out to dry. Often they are shyer than other cormorants and harder to approach.
Pelagic cormorants inhabit the Bering and Chukchi Seas along the North American coastal Pacific area to Baja California and the Asian coast to south China. They breed on the North Pacific coasts (South West Alaska and North East Siberia), and winter south to Baja California, Japan and East China. These birds frequent rocky bays, and particularly deep waters near the base of cliffs. Nesting is both on mainland coasts and islands, often on inaccessible sites, such as steep slopes or narrow ledges on cliffs.
Pelagic cormorants forage only during the day and usually alone in sheltered bays and inlets. They usually swim until locating prey, and though preferring shallow waters, may dive to 180 feet (55 m) to on or near the floor of the sea, steering with their wings and propelled by their feet as they chase their prey under water. On emerging from the water, they perch in a dry area to spread their wings out to dry. These birds are very adept both swimming and flying and can jump straight out of the water and into the air. On land a Pelagic cormorant is quite clumsy and walks with a high-stepping, waddling gait. When landing, they usually scratch at the ground and when feeling threatened, they dart at their opponents with their bills, shaking their heads and making gargling noises. This species is often sedentary, but populations will sometimes perform a short post-breeding dispersal. Individuals make groaning and hissing calls in the colonies. Birds that are perching may make low-pitched moaning and clicking sounds.
Pelagic cormorants are carnivores (piscivores), they eat fish, crustaceans and other bottom-dwelling invertebrates, such as marine worms, algae and amphipods.
Pelagic cormorants are serially monogamous and pairs remain together at least for one breeding season. During the breeding season, males try to attract females by displaying at the nest site with their bill pointed up, their tail down, rapidly raising and lowering the tips of their folded wings so that the white flank patches seem to flash rapidly. Laying takes place from May to July. These birds nest as isolated pairs or in small colonies, on inaccessible sites like narrow ledges or hollows in tall, steep cliffs and rocks. Both adults make the nest, from sticks, algae, moss, grass and debris, reusing it for several subsequent years, adding new material every year. 3-5 bluish-white eggs are laid, and become stained in the nest. Incubation is for one month, shared by both adults. When hatched, the parents feed the chicks, which make short flights when they are 35-40 days old. When they are 45 and 55 days old, they leave the nest, and depend on their parents for food for several more weeks. They reach reproductive maturity at about two years old.
This widespread and numerous species has a very extensive range and so is not considered threatened. But this species is vulnerable to contaminants such as oil pollution, may drown in the gill-nets of fisheries near their feeding areas, and is also affected by increasing recreational activities which cause disturbance at nesting sites.
According to the U.S. Fish and Wildlife Service (FWS) resource, the total breeding population size of the Pelagic cormorant is 400,000 birds, about one third of which is in North America, with 43,700 individuals in 420 colonies in Alaska. The IUCN Red List records the species’ national population as follows: in China: fewer than 100 breeding pairs, with 50-1,000 wintering individuals; in Korea: 100-10,000 breeding pairs, 50-1,000 migrating individuals and 50-1,000 wintering birds; in Japan: 10,000-100,000 breeding pairs, with 1,000-10,000 migrating individuals and 1,000-10,000 wintering birds; in Russia 10,000-100,000 breeding pairs, with 1,000-10,000 birds on migration. Overall, currently Pelagic cormorants are classified as Least Concern (LC) on the IUCN Red List but their numbers today are decreasing.
Social animals are those animals that interact highly with other animals, usually of their own species (conspecifics), to the point of having a rec...