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Erythropitta Ussheri
The black-crowned pitta (''Erythropitta ussheri''), also known as the black-headed pitta, black-and-crimson pitta, black-and-scarlet pitta or black-crowned garnet pitta, is a brightly coloured, ground-dwelling, bird species in the pitta family. It is endemic to the Southeast Asian island of Borneo. It was described by John Gould in 1877, with the type locality recorded as the Lawas River in northern Sarawak. Taxonomy The pitta was formerly considered a subspecies of the garnet pitta but was split because of morphological and vocal differences as well as apparent parapatry. Lack of evidence of hybridisation suggests that the garnet and black-headed pittas are allospecies. Description The birds grow to a length of and a weight of . An adult pitta is distinctively marked with a black head and breast contrasting with a crimson belly and prominent, pale blue, narrow raised stripes extending back from the eyes. The upperparts are dark purple-blue with an iridescent azure patc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graceful Pitta
The graceful pitta (''Erythropitta venusta''), sometimes alternatively known as the black-crowned pitta (although this term is more regularly applied to ''E. ussheri''), is a species of bird in the family Pittidae. It occurs in Sumatra in Indonesia, where its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss. Taxonomy The graceful pitta was formally described in 1836 by the German naturalist Salomon Müller under the binomial name ''Pitta venusta''. His specimens had been collected in western Sumatra. The specific epithet is from Latin ''venustus'' meaning "beautiful" or "lovely". The graceful pitta is now one of 15 species placed in the genus ''Erythropitta'' that was introduced in 1854 by Charles Lucien Bonaparte. The species is monotypic: no subspecies are recognised. Description The graceful pitta is a petite bird that measures approximately in length. Its black coloring is enhanced with reddish undertones, and the botto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allopatric Speciation
Allopatric speciation () – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model – is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Various geographic changes can arise such as the continental drift, movement of continents, and the formation of mountains, islands, bodies of water, or glaciers. Human activity such as agriculture or developments can also change the distribution of species populations. These factors can substantially alter a region's geography, resulting in the separation of a species population into isolated subpopulations. The vicariant populations then undergo Genetics, genetic changes as they become subjected to different Natural selection, selective pressures, experience genetic drift, and accumulate different mutations in the separated populations' gene pools. The barriers prevent t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Kilometre
The square kilometre (square kilometer in American spelling; symbol: km2) is a multiple of the square metre, the SI unit of area or surface area. In the SI unit of area (m2), 1 km2 is equal to 1M(m2). 1 km2 is equal to: * 1,000,000 square metres (m2) * 100 hectares (ha) It is also approximately equal to: * 0.3861 square miles * 247.1 acres Conversely: *1 m2 = 0.000001 (10−6) km2 *1 hectare = 0.01 (10−2) km2 *1 square mile = *1 acre = about The symbol "km2" means (km)2, square kilometre or kilometre squared and not k(m2), kilo–square metre. For example, 3 km2 is equal to = 3,000,000 m2, not 3,000 m2. Examples of areas of 1 square kilometre Topographical map grids Topographical map grids are worked out in metres, with the grid lines being 1,000 metres apart. * 1:100,000 maps are divided into squares representing 1 km2, each square on the map being one square centimetre in area and representing 1 km2 on the surface of the Earth. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danum Valley Conservation Area
Danum Valley Conservation Area is a tract of relatively undisturbed Borneo lowland rain forests, lowland dipterocarp forest in Sabah, Malaysia. It has an extensive diversity of tropical flora and fauna, including species such as the rare Bornean orangutan, gibbons, Chevrotain, mousedeer, clouded leopards and over 270 bird species. Visitor activities include jungle treks, river swimming, birdwatching, night jungle tours and excursions to nearby logging sites and timber mills. There were no human settlements within the area before it became a conservation area, meaning that hunting, logging and other human interference were non-existent, making the area almost unique. It is managed by Yayasan Sabah for conservation, research, education, and habitat restoration training purposes. There have been proposals to nominate the site as a UNESCO World Heritage Site. Geography The nearest town, Lahad Datu is about away, about a 2 hours' drive on mainly logging roads. Danum Valley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old-growth Forest
An old-growth forest or primary forest is a forest that has developed over a long period of time without disturbance. Due to this, old-growth forests exhibit unique ecological features. The Food and Agriculture Organization of the United Nations defines primary forests as naturally regenerated forests of native tree species where there are no clearly visible indications of human activity and the ecological processes are not significantly disturbed. One-third (34 percent) of the world's forests are primary forests. Old-growth features include diverse tree-related structures that provide diverse wildlife habitats that increases the biodiversity of the forested ecosystem. Virgin or first-growth forests are old-growth forests that have never been logged. The concept of diverse tree structure includes multi-layered canopies and canopy gaps, greatly varying tree heights and diameters, and diverse tree species and classes and sizes of woody debris., the world has of primary forest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ravine
A ravine is a landform that is narrower than a canyon and is often the product of streambank erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. Ravines may also be called a cleuch, dell, ghout (Nevis), gill or ghyll, glen, gorge, kloof (South Africa), and chine (Isle of Wight) A ravine is generally a fluvial slope landform of relatively steep (cross-sectional) sides, on the order of twenty to seventy percent in gradient. Ravines may or may not have active streams flowing along the downslope channel which originally formed them; moreover, often they are characterized by intermittent streams, since their geographic scale may not be sufficiently large to support a perennial stream. Definition According to Merriam-Webster, a ravine is "a small, narrow, steep-sided valley that is larger than a gully and smaller than a canyon and that is usually worn by running water". Some societies and languages do not differentiate b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue-banded Pitta
The blue-banded pitta (''Erythropitta arquata'') is a species of bird in the family Pittidae. It is endemic to the island of Borneo, where it is found in all three countries that share the island: Malaysia, Brunei and Indonesia. Its natural habitat is subtropical or tropical moist lowland forest Tropical and subtropical moist broadleaf forests (TSMF), also known as tropical moist forest, is a subtropical and tropical forest habitat type defined by the World Wide Fund for Nature (WWF). Description TSMF is generally found in large .... References * Alan P. PeterseBirds of the World blue-banded pitta Endemic birds of Borneo blue-banded pitta Taxonomy articles created by Polbot {{Pittidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Rainforest
Tropical rainforests are dense and warm rainforests with high rainfall typically found between 10° north and south of the Equator. They are a subset of the tropical forest biome that occurs roughly within the 28° latitudes (in the torrid zone between the Tropic of Cancer and Tropic of Capricorn). Tropical rainforests are a type of tropical moist broadleaf forest, that includes the more extensive seasonal tropical forests. True rainforests usually occur in tropical rainforest climates where no dry season occurs; all months have an average precipitation of at least . Seasonal tropical forests with tropical monsoon climate, tropical monsoon or tropical savanna climate, savanna climates are sometimes included in the broader definition. Tropical rainforests ecosystems are distinguished by their consistent, high temperatures, exceeding monthly, and substantial annual rainfall. The abundant rainfall results in nutrient-poor, leached soils, which profoundly affect the flora and fau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabah
Sabah () is a States and federal territories of Malaysia, state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah has land borders with the Malaysian state of Sarawak to the southwest and Indonesia's North Kalimantan province to the south. The Federal Territory (Malaysia), Federal Territory of Labuan is an island just off Sabah's west coast. Sabah shares maritime borders with Vietnam to the west and the Philippines to the north and east. Kota Kinabalu is the state capital and the economic centre of the state, and the seat of the Government of Sabah, Sabah State government. Other major towns in Sabah include Sandakan and Tawau. The 2020 census recorded a population of 3,418,785 in the state. It has an equatorial climate with tropical rainforests, abundant with animal and plant species. The state has long mountain ranges on the west side which forms part of the Crocker Range National Park. Kinabatangan River, the second longest river in Malaysia runs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malaysia
Malaysia is a country in Southeast Asia. Featuring the Tanjung Piai, southernmost point of continental Eurasia, it is a federation, federal constitutional monarchy consisting of States and federal territories of Malaysia, 13 states and three federal territories, separated by the South China Sea into two regions: Peninsular Malaysia on the Mainland Southeast Asia, Indochinese Peninsula and East Malaysia on the island of Borneo. Peninsular Malaysia shares land and maritime Malaysia–Thailand border, borders with Thailand, as well as maritime borders with Singapore, Vietnam, and Indonesia; East Malaysia shares land borders with Brunei and Indonesia, and a maritime border with the Philippines and Vietnam. Kuala Lumpur is the country's national capital, List of cities and towns in Malaysia by population, largest city, and the seat of the Parliament of Malaysia, legislative branch of the Government of Malaysia, federal government, while Putrajaya is the federal administrative capi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black-crowned Pitta (Pitta Ussheri)
The black-crowned pitta (''Erythropitta ussheri''), also known as the black-headed pitta, black-and-crimson pitta, black-and-scarlet pitta or black-crowned garnet pitta, is a brightly coloured, ground-dwelling, bird species in the pitta family. It is endemic to the Southeast Asian island of Borneo. It was described by John Gould in 1877, with the type locality recorded as the Lawas River in northern Sarawak. Taxonomy The pitta was formerly considered a subspecies of the garnet pitta but was split because of morphological and vocal differences as well as apparent parapatry. Lack of evidence of hybridisation suggests that the garnet and black-headed pittas are allospecies. Description The birds grow to a length of and a weight of . An adult pitta is distinctively marked with a black head and breast contrasting with a crimson belly and prominent, pale blue, narrow raised stripes extending back from the eyes. The upperparts are dark purple-blue with an iridescent azure patch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
