|
La Grille
La Grille is a volcano in the Comoros archipelago on the island of Grande Comore (also known as Ngazidja). Description La Grille is a shield volcano at the northern end of island and lacks a summit caldera like its larger and more well-known neighbour to the south, Karthala volcano. The basaltic La Grille volcano also differs from Karthala in its abundance of pyroclastic cones up to in height. The cones were erupted along fissures running parallel to the summit ridge, which has an irregular profile and is elongated in a north-south direction, and from radial fissures that reach as far as the coast. Although the exact date of the last eruption of La Grille is unknown, lava flows covering its sides and not yet recolonized by vegetation suggest that the volcano last erupted only a few hundred years ago. Recent lava flows, some possibly as young as a few hundred years, have reached the sea from fissures on the lower western, northern, and eastern flanks. Geography La Grille is locate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Important Bird Area
An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife International. There are over 13,000 IBAs worldwide. These sites are small enough to be entirely conserved and differ in their character, habitat or ornithological importance from the surrounding habitat. In the United States the Program is administered by the National Audubon Society. Often IBAs form part of a country's existing protected area network, and so are protected under national legislation. Legal recognition and protection of IBAs that are not within existing protected areas varies within different countries. Some countries have a National IBA Conservation Strategy, whereas in others protection is completely lacking. History In 1985, following a specific request from the European Economic Community, Birdlife International ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygenetic Shield Volcanoes
Polygenesis can refer to: * Polygenesis (linguistics), a theory of language origin * Polygenism, a theory of human origin * Gene duplication Gene duplication (or chromosomal duplication or gene amplification) is a major mechanism through which new genetic material is generated during molecular evolution. It can be defined as any duplication of a region of DNA that contains a gene. ..., a form of genetic disorder resulting in the overexpression of a particular gene Gourav * Polygenetic landforms, landforms formed the accumulative action of various processes {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of The Comoros
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red-headed Fody
The Comoros fody (''Foudia eminentissima''), also known as the red-headed fody, is a species of passerine bird in the family Ploceidae. It is found in the Comoros. The taxon ''aldabrana'', was previously often considered a subspecies of the Comoros fody. Previously, the forest fody from Madagascar was considered a subspecies of the Comoros fody. References External links Aldabra fodyanComoros fodyon Weaver WatchRed-headed fody mediaon the Internet Bird Collection Comoros fody Birds of the Comoros Birds of Mayotte Birds of Seychelles Comoros fody Comoros fody The Comoros fody (''Foudia eminentissima''), also known as the red-headed fody, is a species of passerine bird in the family Ploceidae. It is found in the Comoros. The taxon ''aldabrana'', was previously often considered a subspecies of the Comoro ... Taxonomy articles created by Polbot {{Ploceidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humblot's Sunbird
Humblot's sunbird (''Cinnyris humbloti'') is a species of bird in the family Nectariniidae. It is endemic to the islands of Grand Comoro and Mohéli in the Comoros. Description The adult male Humblot's sunbird has green upperparts with a dark or gold gloss. In the nominate subspecies the throat and upper breast are glossy green with a red lower breast, in the subspecies from Mohéli the upperparts are duller and the throat and upper breast are glossed with purple. It has yellow and the lower breast and belly are yellowish green. The adult female is olive green above, greyer on the head with a brighter rump and greyer underparts with dark spots and streaks, has a white tip to the tail and pectoral tufts. They are 11 cm in length and the male weights 5.5–7g, the female 5.5–8g. Voice The song of Humblot's sunbird consists of a series of series of chipping notes, which are mixed up. Alarm and contact calls are a harsh scolding “''tssk, tssk''”. Distribution and habitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comoro Thrush
The Comoros thrush (''Turdus bewsheri'') is a species of bird in the family Turdidae. It is found in the Comoros Islands in the south western Indian Ocean. Description The Comoros thrush is a brown bird with olive tinged upperparts, slightly more rufous on the tail and wings. The underparts are whitish except for brown flanks and brown scaling on the breast and belly, central belly and undertail coverts are white. The females are browner than the males but otherwise similar, juveniles are more rufous. The length is 24 cm. Voice The song is a typically thrush-like series of melodious, rich notes which varies between islands. ALarm call is a sharp "''twit''" and there is a soft contact call. Distribution and subspecies There are three recognised subspecies, each endemic to a single island. They are: *''Turdis bewsheri comorensis'' Milne-Edwards & Oustalet, 1885: Grand Comoro. *''Turdis bewsheri moheliensis'' Benson, 1960: Mohéli. *''Turdis bewsheri bewsheri'' E. Newton, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Comoro Bulbul
The Grande Comore bulbul (''Hypsipetes parvirostris'') is a species of songbird in the bulbul family, Pycnonotidae. It is found on the Comoro Islands. Its natural habitat is subtropical or tropical moist montane forests. Until 2011, the Moheli bulbul The Moheli bulbul (''Hypsipetes moheliensis'') is a species of songbird in the bulbul family, Pycnonotidae. It is endemic to the Indian Ocean island of Mohéli. Its natural habitat is subtropical or tropical moist montane forest Montane eco ... was considered as a subspecies of the Grand Comoro bulbul. Alternative names for the Grande Comore bulbul include the Comoro bulbul and Grand Comoro black bulbul. References Grande Comore bulbul Endemic birds of the Comoros Grande Comore Grande Comore bulbul Taxonomy articles created by Polbot {{Mayotte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Comoro Brush Warbler
The Grand Comoro brush warbler (''Nesillas brevicaudata'') is a species of Old World warbler in the family Acrocephalidae. It is found in Comoros and Mayotte. Its natural habitat is subtropical or tropical moist montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...s. References Grand Comoro brush warbler Endemic birds of the Comoros Birds of Mayotte Grand Comoro brush warbler Taxonomy articles created by Polbot {{Mayotte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malagasy Harrier
The Malagasy harrier (''Circus macrosceles'') is a bird of prey belonging to the marsh harrier group of harriers. It inhabits Madagascar and the Comoro Islands in the Indian Ocean. It was formerly regarded as a subspecies of the Réunion harrier (''C. maillardi'') but is increasingly treated as a separate species. It is also known as the Madagascar harrier, Madagascar marsh harrier or Malagasy marsh harrier. Description It is about 42–55 cm long; the female is up to 13% larger than the male. The male has a blackish back and a greyer head with dark streaks. The underparts and rump are whitish and the tail is grey with dark bars. The forewings and wingtips are blackish while the secondaries are grey with dark bars. Females are browner than the males. The Réunion harrier is smaller and darker with shorter legs and shorter, more rounded wings. Males have a blacker head and plainer secondaries and tail. Distribution and habitat In Madagascar it is found in marshland and gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comoro Blue Pigeon
The Comoros blue pigeon (''Alectroenas sganzini'') is a species of bird in the family Columbidae. It is endemic to the Comoros and the coralline Seychelles. It is rated as a species of near threatened on the International Union for Conservation of Nature Red List of Endangered Species. Description The Comoros blue pigeon measures about in length. The male weighs from , and the female weighs about . It has a silvery gray head, neck, and upper breast. The neck feathers are silvery white in colour, and are very long and deeply partitioned. The beak is greenish or yellowish grey, and has a pale yellow or greenish white tip. It has black lower underparts. The lower part of the breast is shiny violet-blue, and the belly and flanks are more greenish blue in colour. Distribution and habitat The Comoros blue pigeon is endemic to the Comoros and the coralline Seychelles. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comoro Olive Pigeon
The Comoros olive pigeon (''Columba pollenii''), also known as the Comoro olive pigeon, is a species of bird in the family Columbidae. It is found in Comoros and Mayotte. It is becoming rare due to habitat loss. Description Easily distinguishable from other pigeon species, the Comoros olive pigeon is the largest bird in the Comoro Islands. It has a dark plumage. Adolescent pigeons have a bright yellow bill, whereas older ones have a dull green or brown bill. The Comoros olive pigeon makes a very deep coo of "guk-ohoooo hoo hooo". Habitat Its natural habitat is subtropical or tropical moist montane forests and it can be found in Comoros (especially Mount Karthala) and Mayotte, with a higher-density population being observed in the latter. Status Although described as locally common in parts of Grand Comoro, the Comoros olive pigeon is in general a fairly scarce bird with a small total population. The chief threat it faces is the clearance of the forest habitat in which it li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
