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Black-bellied Tern
The black-bellied tern (''Sterna acuticauda'') is a tern found near large rivers in the Indian subcontinent, its range extending from Pakistan, Nepal and India to Myanmar. It has become very scarce in the eastern part of its range and the International Union for Conservation of Nature has assessed its conservation status as being endangered. They have a black belly in the summer and a deep forked tail. They can sometimes resemble whiskered terns (''Chlidonias hybrida''), but the deeper fork of the tail and the black on the lower belly distinguish them from the shallow fork and black closer to the breast on the whiskered tern. Considering that sequence analysis supports moving the similar black-fronted tern (''"Sterna" albostriata'') into ''Chlidonias'', this species might also be better placed in that genus, but no research has yet been conducted. Description The black-bellied tern grows to a length of . In the breeding plumage, the crown and nape are black and the upper parts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Edward Gray
John Edward Gray, FRS (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a zoological name. Gray was keeper of zoology at the British Museum in London from 1840 until Christmas 1874, before the natural history holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups and descriptions of new species. He improved the zoological collections to make them amongst the best in the world. Biography Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing ''The Natural Arrangement of British Plants'' (1821). After being blackballed by the Linnean Society of London, Gray shifted his interest from botany to zoology. He began his zoologica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union For Conservation Of Nature
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natural resources. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partnerships. The organization is best known to the wider pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and invasive species. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are considered when assessing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whiskered Tern
The whiskered tern (''Chlidonias hybrida'') is a tern in the family Laridae. The genus name is from Ancient Greek ''khelidonios'', "swallow-like", from ''khelidon'', "swallow". The specific ''hybridus'' is Latin for ''hybrid''; Peter Simon Pallas thought it might be a hybrid of white-winged black tern and common tern, writing "''Sterna fissipes 'Chlidonias leucopterus''et Hirundine 'Sterna hirundo''natam''”. This bird has a number of geographical races, differing mainly in size and minor plumage details. ''C. h. hybrida'' breeds in warmer parts of Europe and the Palearctic (northwestern Africa and central and southern Europe to southeastern Siberia, eastern China and south to Pakistan and northern India). The smaller-billed and darker ''C. h. delalandii'' is found in east and south Africa, and the paler ''C. h. javanicus'' from Java to Australia. The tropical forms are resident, but European and Asian birds winter south to Africa and the Indian Subcontinent. A tagged whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black-fronted Tern
The black-fronted tern (''Chlidonias albostriatus''), also known as sea martin, ploughboy, inland tern, riverbed tern or tarapiroe,Rod Morris and Alison Ballance, ''"Rare Wildlife of New Zealand"'', Random House, 2008 is a small tern generally found in or near bodies of fresh water in New Zealand, where it forages for freshwater fish, arthropods and worms. It has a predominantly grey plumage. Restricted to breeding in the eastern regions of the South Island, it is declining and threatened by introduced mammals and birds. It is rated as endangered on the International Union for Conservation of Nature (IUCN)'s Red List of Threatened Species. Taxonomy German naturalist Johann Reinhold Forster described the black-fronted tern from a specimen collected at Queen Charlotte Sound, Marlborough in 1832, giving it the binomial name ''Sterna antarctica'', however the name had already been used for the Antarctic tern by French naturalist René Lesson the previous year. The first valid des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colony (biology)
In biology, a colony is composed of two or more conspecific individuals living in close association with, or connected to, one another. This association is usually for mutual benefit such as stronger defense or the ability to attack bigger prey. Colonies can form in various shapes and ways depending on the organism involved. For instance, the bacterial colony is a cluster of identical cells (clones). These colonies often form and grow on the surface of (or within) a solid medium, usually derived from a single parent cell. Colonies, in the context of development, may be composed of two or more unitary (or solitary) organisms or be modular organisms. Unitary organisms have determinate development (set life stages) from zygote to adult form and individuals or groups of individuals (colonies) are visually distinct. Modular organisms have indeterminate growth forms (life stages not set) through repeated iteration of genetically identical modules (or individuals), and it can be diffic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Tern
The Indian river tern or just river tern (''Sterna aurantia'') is a tern in the family Laridae. It is a resident breeder along inland rivers from Iran east into the Indian Subcontinent and further to Myanmar to Thailand, where it is uncommon. Unlike most ''Sterna'' terns, it is almost exclusively found on freshwater, rarely venturing even to tidal creeks. This species breeds from March to May in colonies in less accessible areas such as sandbanks in rivers. It nests in a ground scrape, often on bare rock or sand, and lays three greenish-grey to buff eggs, which are blotched and streaked with brown. This is a medium-sized tern, 38–43 cm long with dark grey upperparts, white underparts, a forked tail with long flexible streamers, and long pointed wings. The bill is yellow and the legs red. It has a black cap in breeding plumage. In the winter the cap is greyish white, flecked and streaked with black, there is a dark mask through the eye, and the tip of the bill becomes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratincole
The pratincoles or greywaders are a group of birds which together with the coursers make up the family Glareolidae. They have short legs, very long pointed wings and long forked tails. Description Their most unusual feature for birds classed as waders is that they typically hunt their insect prey on the wing like swallows, although they can also feed on the ground. Their short bills are an adaptation to aerial feeding. Their flight is fast and graceful like a swallow or a tern, with many twists and turns to pursue their prey. They are most active at dawn and dusk, resting in the warmest part of the day. Like the coursers, the pratincoles are found in warmer parts of the Old World, from southern Europe and Africa east through Asia to Australia. Species breeding in temperate regions are long-distance migrants. Their two to four eggs are laid on the ground in a bare scrape. The downy pratincole chicks are able to run as soon as they are hatched. The Australian pratincole, the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Skimmer
The Indian skimmer or Indian scissors-bill (''Rynchops albicollis'') is one of the three species that belong to the skimmer genus ''Rynchops'' in the family Laridae. They are somewhat tern-like but like other skimmers, have a short upper mandible and the longer lower mandible that is ploughed along the surface of water as the bird flies over the water to pick aquatic prey. It is found in southern Asia, where it is patchily distributed and declining in numbers. They are mainly found in rivers or estuaries. They are very brightly marked in black, white and orange, making them difficult to miss. Description This bird has a black cap and orange bill that contrasts with the white body. With its long wings it looks tern-like and is about 40–43 cm long with a wingspan of 108 cm. The upper parts of the body are dark black and the underparts are white. The black cap on the head leaves the forehead and nape white. The wings are long and pointed with a white trailing edge. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sterna
''Sterna'' is a genus of terns in the bird family Laridae. The genus used to encompass most "white" terns indiscriminately, but mtDNA sequence comparisons have recently determined that this arrangement is paraphyletic. It is now restricted to the typical medium-sized white terns occurring near-globally in coastal regions.Bridge, E. S.; Jones, A. W. & Baker, A. J. (2005)A phylogenetic framework for the terns (Sternini) inferred from mtDNA sequences: implications for taxonomy and plumage evolution. ''Molecular Phylogenetics and Evolution'' 35: 459–469. Taxonomy The genus ''Sterna'' was introduced in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his ''Systema Naturae''. The type species is the common tern (''Sterna hirundo''). ''Sterna'' is derived from Old English "stearn" which appears in the poem '' The Seafarer''; a similar word was used to refer to terns by the Frisians. Species The genus contains 13 species. For the "brown-backed terns" see genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of Pakistan
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the bee hummingbird to the ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. Birds have whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. Birds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of India
This is a list of the bird species of India and includes Extant taxon, extant and recently extinct species recorded within the political limits of the Republic of India as defined by the Indian government are known to have 1364 species as of 2021, of which 81 are Endemism in birds, endemic to the country. 212 species are globally threatened. The Indian peafowl (''Pavo cristatus'') is the national bird of India. This list does not cover species in Indian jurisdiction areas such as Dakshin Gangotri and oceanic species are delineated by an arbitrary cutoff distance. The list does not include fossil bird species or escapees from captivity. This list's Taxonomy (biology), taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of the IOC World Bird List, version 11.2. This list also uses British English throughout. Any bird names or other wording follows that convention. The following tags hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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