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Wildlife Of Saint Helena, Ascension And Tristan Da Cunha
Saint Helena, Ascension Island and Tristan da Cunha, as well the other uninhabited islands nearby, are a haven for wildlife in the middle of the Atlantic Ocean. The islands are or were home to much endemic flora and fauna, especially invertebrates, and many endemic fish species found in the reef ecosystems off the islands. The islands have been identified by BirdLife International as Important Bird Areas for both their endemic landbirds and breeding seabirds. See Ascension scrub and grasslands, Saint Helena scrub and woodlands, and Tristan da Cunha–Gough Islands shrub and grasslands for more details of the World Wildlife Fund-designated ecoregions. Reptiles There are no crocodilians or snakes on the islands. However, many turtles appear around them. Birds Saint Helena Saint Helena is not now a major breeding site for seabirds as Ascension is, but it used to have more endemic birds, all but one of which are now extinct. The wirebird (''Charadrius sanctaehelenae'') is a type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Helena
Saint Helena () is a British overseas territory located in the South Atlantic Ocean. It is a remote volcanic tropical island west of the coast of south-western Africa, and east of Rio de Janeiro in South America. It is one of three constituent parts of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha. Saint Helena measures about and has a population of 4,439 per the 2021 census. It was named after Helena, mother of Constantine I. It is one of the most remote islands in the world and was uninhabited when discovered by the Portuguese enroute to the Indian subcontinent in 1502. For about four centuries the island was an important stopover for ships from Europe to Asia and back, while sailing around the African continent, until the opening of the Suez canal. St Helena is the United Kingdom's second-oldest overseas territory after Bermuda. Saint Helena is known for being the site of Napoleon's second exile, following his final defeat in 1815. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Helena Crake
The Saint Helena crake (''Zapornia astrictocarpus'') is an extinct bird species from the island of Saint Helena in the South Atlantic Ocean, one of two flightless rails which survived there until the early 16th century.Storrs L. Olson, Paleornithology of St Helena Island, south Atlantic Ocean, Smithsonian Contributions to Paleobiology 23 (1975) After American ornithologist Alexander Wetmore described bones of the large Saint Helena rail (''Aphanocrex podarces'') from Prosperous Bay, Saint Helena, in 1963, American paleontologist Storrs Olson found almost complete skeletons of the Saint Helena crake in the same region in 1973. These skeletons consist of bones which were smaller than the bones of ''Aphanocrex podarces''. Due to the peculiar shape of the carpometacarpus Olson named this species ''Porzana astrictocarpus''. Olson proceeded on the assumption that the Saint Helena crake was a derivative of the Baillon's crake (''Zapornia pusilla''), which is widespread in Europe and A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascension Crake
The Ascension crake (''Mundia elpenor'') is an extinct flightless bird that previously lived on Ascension Island in the South Atlantic Ocean. Like many other flightless birds on isolated islands, it was a rail. It was declared extinct by Groombridge in 1994; BirdLife International confirmed this in 2000 and 2004. The bird was endemic to Ascension Island. Numerous subfossil bones of the bird have been found in deposits at the base of vertical fumaroles. Peter Mundy, a 17th-century merchant and traveler gave an account of the bird and made a sketch of it when he visited Ascension Island in June 1656. It was described by Mundy as: It most likely lived in the near-desert areas of the island and primarily ate sooty tern (''Sterna fuscata'') eggs. It is probable that it became extinct after rats were introduced to the island in the 18th century, but it may have survived until the introduction of feral cats in 1815. The bird was regarded by Storrs Olson as a relative of '' Atlan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sooty Tern
The sooty tern (''Onychoprion fuscatus'') is a seabird in the family Laridae. It is a bird of the tropical oceans, returning to land only to breed on islands throughout the equatorial zone. Taxonomy The sooty tern was described by Carl Linnaeus in 1766 as ''Sterna fuscata'', bearing this name for many years until the genus ''Sterna'' was split up. It is now known as ''Onychoprion fuscatus''. The genus name is from ancient Greek , "claw" or "nail", and , "saw". The specific ''fuscatus'' is Latin for "dark". Colloquially, it is known as the wideawake tern or just wideawake. This refers to the incessant calls produced by a colony of these birds, as does the Hawaiian name ''ʻewa ʻewa'' which roughly means "cacophony". In most of Polynesia its name is ''manutara'' or similar – literally "tern-bird", though it might be better rendered in English as "the tern" or "common tern". This refers to the fact that wherever Polynesian seafarers went on their long voyages, they usuall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petrel
Petrels are tube-nosed seabirds in the bird order Procellariiformes. Description The common name does not indicate relationship beyond that point, as "petrels" occur in three of the four families within that group (all except the albatross family, Diomedeidae). Having a fossil record that was assumed to extend back at least 60 million years, the Procellariiformes was long considered to be among the older bird groupings, other than the ratites, with presumably distant ties to penguins and loons. However, recent research and fossil finds such as ''Vegavis'' show that the Galliformes (pheasants, grouse and relatives), and Anseriformes (ducks, geese) are still not fully resolved. Known species All the members of the order are exclusively pelagic in distribution—returning to land only to breed. The family Procellariidae is the main radiation of medium-sized true petrels, characterised by united nostrils with medium septum, and a long outer functional primary feather. It is dom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-tailed Tropicbird
The white-tailed tropicbird (''Phaethon lepturus'') is a tropicbird. It is the smallest of three closely related seabirds of the tropical oceans and smallest member of the order Phaethontiformes. It is found in the tropical Atlantic, western Pacific and Indian Oceans. It also breeds on some Caribbean islands, and a few pairs have started nesting recently on Little Tobago, joining the red-billed tropicbird colony. In addition to the tropical Atlantic, it nests as far north as Bermuda, where it is locally called a "longtail". Taxonomy There are six subspecies: * ''P. l. lepturus''—Indian Ocean * ''P. l. fulvus'' (golden bosun)—This form has a golden wash to the white plumage * ''P. l. dorotheae''—tropical Pacific * ''P. l. catesbyi''—Bermuda and Caribbean * ''P. l. ascensionis''— Ascension Island * ''P. l. europae''—Europa Island, s. Mozambique Channel Description The adult white-tailed tropicbird is a slender, mainly white bird, 71–80 cm long including the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red-billed Tropicbird
The red-billed tropicbird (''Phaethon aethereus'') is a tropicbird, one of three closely related species of seabird of tropical oceans. Superficially resembling a tern in appearance, it has mostly white plumage with some black markings on the wings and back, a black mask and, as its common name suggests, a red bill. Most adults have that are about two times their body length, with those in males being generally longer than those in females. The red-billed tropicbird itself has three subspecies recognized, including the nominate. The subspecies ''mesonauta'' is distinguished from the nominate by the rosy tinge of its fresh plumage, and the subspecies ''indicus'' can be differentiated by its smaller size, more restricted mask, and more orange bill. This species ranges across the tropical Atlantic, eastern Pacific, and Indian Oceans. The nominate is found in the southern Atlantic Ocean, the subspecies ''indicus'' in the waters off of the Middle East and in the Indian Ocean, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Masked Booby
The masked booby (''Sula dactylatra''), also called the masked gannet or the blue-faced booby, is a large seabird of the booby and gannet family, Sulidae. First described by the French naturalist René-Primevère Lesson in 1831, the masked booby is one of six species of booby in the genus '' Sula''. It has a typical sulid body shape, with a long pointed yellowish bill, long neck, aerodynamic body, long slender wings and pointed tail. The adult is bright white with black wings, a black tail and a dark face mask; at long, it is the largest species of booby. The sexes have similar plumage. This species ranges across tropical oceans, except in the eastern Atlantic and eastern Pacific. In the latter, it is replaced by the Nazca booby (''Sula granti''), which was formerly regarded as a subspecies of masked booby. Nesting takes place in colonies, generally on islands and atolls far from the mainland and close to deep water required for foraging. Territorial when breeding, the masked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Booby
The brown booby (''Sula leucogaster'') is a large seabird of the booby family Sulidae, of which it is perhaps the most common and widespread species. It has a pantropical range, which overlaps with that of other booby species. The gregarious brown booby commutes and forages at low height over inshore waters. Flocks plunge-dive to take small fish, especially when these are driven near the surface by their predators. They only nest on the ground, and roost on solid objects rather than the water surface. Taxonomy The brown booby was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in his ''Histoire Naturelle des Oiseaux'' in 1781. The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the ''Planches Enluminées D'Histoire Naturelle'' which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Buffon did not include a scientific name with his description but in 1783 the Dutch naturalist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red-footed Booby
The red-footed booby (''Sula sula'') is a large seabird of the booby family, Sulidae. Adults always have red feet, but the colour of the plumage varies. They are powerful and agile fliers, but they are clumsy in takeoffs and landings. They are found widely in the tropics, and breed colonially in coastal regions, especially islands. The species faces few natural or man-made threats, although its population is declining; it is considered to be a least-concern species by the International Union for Conservation of Nature (IUCN). Taxonomy The first formal description of the red-footed booby was by the Swedish naturalist Carl Linnaeus in 1766 in the twelfth edition of his ''Systema Naturae''. He introduced the binomial name ''Pelecanus sula''. The type locality is Barbados in the West Indies. The present genus ''Sula'' was introduced by the French scientist Mathurin Jacques Brisson in 1760. The word ''Sula'' is Norwegian for a gannet. There are three subspecies: * ''S. s. sula'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascension Frigatebird
The Ascension frigatebird (''Fregata aquila'') is a seabird of the frigatebird family Fregatidae which breeds on Boatswain Bird Island and Ascension Island in the tropical Atlantic Ocean. The Ascension frigatebird is a large lightly built seabird with brownish-black plumage and a deeply forked tail. It has a wingspan of around . The male has a striking red gular sac which he inflates to attract a mate. The female is slightly larger than the male and has a brown breast-band and sometimes a white belly. They feed on fish taken in flight from the ocean's surface (mostly flying fish), and sometimes indulge in kleptoparasitism, harassing other birds to force them to regurgitate their food. Taxonomy The Ascension frigatebird was described by Carl Linnaeus in his landmark 1758 10th edition of ''Systema Naturae'' under the binomial name ''Pelecanus aquilus''. His specimen had been collected from the Ascension Island by the Swedish explorer Pehr Osbeck. The names "frigatebird" and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boatswain Bird Island
Boatswain Bird Island, also spelt Boatswainbird Island, is a small island some off the east coast of Ascension Island in the South Atlantic Ocean with an area of approximately . It is administered from Georgetown on Ascension, which is part of Saint Helena, Ascension and Tristan da Cunha, an overseas territory of the United Kingdom. Boatswain Bird Island should not be confused with the nearby, much smaller, Boatswain Bird Rock, only about in size, located south-east of the island and north-east of the coast of Ascension. The southern coast of the island has an impressive natural arch. Birds There are thousands of inhabitants on this tiny island, all of which are birds, which give the island its white colour. Among the many seabirds nesting there are boobies, petrels, noddies, as well as the tropicbirds (boatswain birds) for which the island is named. The island is the home of the majority of Ascension's birds due to rats (accidentally introduced by passing ships) and then c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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