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Black-crowned Pitta
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 pat ... [...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 and Indonesia, where its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss. Gallery Erythropitta venusta 1838, crop.jpg, Illustration by Nicolas Huet the Younger, Nicolas Hüet Pitta venusta - De vogels van nederlandsche Indië (1860) (20269391674) (cropped).jpg, Adult and immature References External linksBirdLife Species Factsheet. Erythropitta, graceful pitta Birds of Sumatra Birds described in 1835, graceful pitta Taxonomy articles created by Polbot {{Pittidae-stub ... [...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 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 genetic changes as they become subjected to different selective pressures, experience genetic drift, and accumulate different mutations in the separated populations' gene pools. The barriers prevent the exchange of genetic information betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Kilometre
Square kilometre ( International spelling as used by the International Bureau of Weights and Measures) or square kilometer (American spelling), symbol km2, is a multiple of the square metre, the SI unit of area or surface area. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danum Valley Conservation Area
Danum Valley Conservation Area is a 438 square kilometres tract of relatively undisturbed lowland dipterocarp forest in Sabah, Malaysia. It has an extensive diversity of tropical flora and fauna, including such species as the rare Bornean orangutans, gibbons, mousedeer, clouded leopards and over 270 bird species. Activities offered are jungle treks, river swimming, bird watching, night jungle tours and excursions to nearby logging sites and timber mills. The area holds unique status in the sense that before it became a conservation area there were no human settlements within the area, meaning that hunting, logging and other human interference was 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 82 km away (about a 2 hours drive on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old-growth Forest
An old-growth forestalso termed primary forest, virgin forest, late seral forest, primeval forest, or first-growth forestis a forest that has attained great age without significant disturbance, and thereby exhibits unique ecological features, and might be classified as a climax community. 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. More than one-third (34 percent) of the world's forests are primary forests. Old-growth features include diverse tree-related structures that provide diverse wildlife habitat 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 height ... [...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.Definition of "ravine" at Ravines are typically classified as larger in scale than , although smaller than s. Ravines may also be called a cleuch, dell, ghout (), [...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. References * Alan P. PeterseBirds of the World Erythropitta, blue-banded pitta Endemic birds of Borneo Birds described in 1871, blue-banded pitta Taxonomy articles created by Polbot {{Pittidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Rainforest
Tropical rainforests are rainforests that occur in areas of tropical rainforest climate in which there is no dry season – all months have an average precipitation of at least 60 mm – and may also be referred to as ''lowland equatorial evergreen rainforest''. True rainforests are typically found between 10 degrees north and south of the equator (see map); they are a sub-set of the tropical forest biome that occurs roughly within the 28-degree latitudes (in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn). Within the World Wildlife Fund's biome classification, tropical rainforests are a type of tropical moist broadleaf forest (or tropical wet forest) that also includes the more extensive seasonal tropical forests. Overview Tropical rainforests are characterized by two words: hot and wet. Mean monthly temperatures exceed during all months of the year. Average annual rainfall is no less than and can exceed although it typically lies betwe ... [...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 borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory (Malaysia), Federal Territory of Labuan is an island just off Sabah's west coast. Kota Kinabalu is the state capital city, 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 through Sabah. The highest point of Sabah, Mount Kinabalu is also the highest point of Malaysia. The ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two regions: Peninsular Malaysia and Borneo's East Malaysia. Peninsular Malaysia shares a land and maritime Malaysia–Thailand border, border with Thailand and Maritime boundary, maritime borders with Singapore, Vietnam, and Indonesia. East Malaysia shares land and maritime borders with Brunei and Indonesia, and a maritime border with the Philippines and Vietnam. Kuala Lumpur is the national capital, the country's largest city, and the seat of the Parliament of Malaysia, legislative branch of the Government of Malaysia, federal government. The nearby Planned community#Planned capitals, planned capital of Putrajaya is the administrative capital, which represents the seat of both the Government of Malaysia#Executive, executive branch (the Cabine ... [...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 p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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