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Chestnut-winged Whistling-thrush
The brown-winged whistling thrush (''Myophonus castaneus''), also known as the Sumatran whistling thrush or chestnut-winged whistling thrush, is a passerine bird belonging to the whistling thrush genus ''Myophonus'' in the family Muscicapidae. It is endemic to the island of Sumatra in Indonesia. In the past, it has often been lumped together with the Javan whistling thrush (''M. glaucinus'') and Bornean whistling thrush (''M. borneensis'') as the "Sunda whistling thrush" (''M. glaucinus'') but it is now often regarded as a separate species based on differences in plumage and measurements. It is about 25 centimetres long. The black bill has an average depth of 7.3 millimetres, slenderer than the bills of the Bornean and Javan whistling thrushes. The legs and feet are dark brown. The adult male has a dark blue head, breast and shoulders with the rest of the plumage being chestnut. The adult female and immature are mostly dull chestnut-brown with a blue patch on the shoulder. The B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert George Wardlaw Ramsay
Colonel Robert George Wardlaw-Ramsay (25 January 1852 – 22 April 1921) was a British Army officer and naturalist. Early life Wardlaw-Ramsay's father was Robert Balfour Wardlaw-Ramsay while his mother Louisa was the third daughter of George, eighth Marquess of Tweeddale. He studied at Cheam and Harrow before joining the Hampshire Regiment in January 1871 to be stationed in India, Afghanistan and Burma. Ornithology Wardlaw-Ramsay's interest in birds began as a young boy and in 1872 (aged 20) he was elected a member of the British Ornithologists' Union and was later (1913-1918) to become its president. He was also a Fellow of the Zoological Society. During his various army postings he took a great interest in the local ornithology. He was a nephew of Arthur Hay, 9th Marquess of Tweeddale and inherited a large collection of over 20,000 bird skins that was later presented to the British Museum. He also edited ''The Ornithological works of Arthur 9th Marquis of Tweeddale'' (1881) an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bornean Whistling Thrush
The Bornean whistling thrush (''Myophonus borneensis'') is a species of bird in the family Muscicapidae. It is found in Indonesia and Malaysia, where it is endemic to the island of Borneo. 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 lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is ...s. On average, Borean whistling thrushes lay clutch sizes of about 2 eggs, which they incubate for about 18 days. The nesting period lasts 24 days. They are threatened by climate change, especially droughts. References Myophonus Birds described in 1885 Taxa named by Philip Sclater Endemic birds of Borneo Taxonomy articles created by Polbot {{Muscicapidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Birds Of Sumatra
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or becomin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of Sumatra
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 common ostrich. There are over 11,000 living species and they are split into 44 orders. More than half are passerine or "perching" birds. Birds have wings 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myophonus
The whistling thrushes comprise a genus ''Myophonus'' of the Old World flycatcher family Muscicapidae. They are all medium-sized mostly insectivorous or omnivorous birds. They are all brightly coloured species found in India and south-eastern Asia. The male is usually blue, and the females are either similar to the male or brown. The brighter blue patches found on the shoulders and sometimes the head, of whistling thrushes, uniquely for a passerine, reflect strongly in the ultraviolet. Taxonomy The genus ''Myophonus'' was introduced in 1822 by the Dutch zoologist Coenraad Jacob Temminck to accommodate a single species, ''Myophonus metallicus'' Temminck. This is a Synonym (taxonomy), junior synonym of ''Turdus flavirostris'' Thomas Horsfield, Horsfield, a subspecies of the blue whistling thrush which is therefore the type species. There has been confusion as to the correct spelling of the genus name. Temminck's work was published in 102 parts (livraisons) and Plate 170 with the as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deforestation
Deforestation or forest clearance is the removal and destruction of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. About 31% of Earth's land surface is covered by forests at present. This is one-third less than the forest cover before the expansion of agriculture, with half of that loss occurring in the last century. Between 15 million to 18 million hectares of forest, an area the size of Bangladesh, are destroyed every year. On average 2,400 trees are cut down each minute. Estimates vary widely as to the extent of deforestation in the tropics. In 2019, nearly a third of the overall tree cover loss, or 3.8 million hectares, occurred within humid tropical primary forests. These are areas of mature rainforest that are especially important for biodiversity and carbon storage. The direct cause of most deforestation is agriculture by far. More than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montane Forest
Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial factor in shaping plant community, biodiversity, metabolic processes and ecosystem dynamics for montane ecosystems. Dense montane forests are common at moderate elevations, due to moderate temperatures and high rainfall. At higher elevations, the climate is harsher, with lower temperatures and higher winds, preventing the growth of trees and causing the plant community to transition to montane grasslands and shrublands or alpine tundra. Due to the unique climate conditions of montane ecosystems, they contain increased numbers of endemic species. Montane ecosystems also exhibit variation in ecosystem services, which include carbon storage and water supply. Life zones As elevation increases, the alpine climate, climate becomes co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beak
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for pecking, grasping, and holding (in probing for food, eating, manipulating and carrying objects, killing prey, or fighting), preening, courtship, and feeding young. The terms ''beak'' and '' rostrum'' are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, rhynchosaurs, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a bill-like structure), sirens, pufferfish, billfishes, and cephalopods. Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections–the upper and lower mandibles–are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes called ''nares'' lead to the respiratory system. Etymology Although the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Javan Whistling Thrush
The Javan whistling thrush (''Myophonus glaucinus'') is a species of bird in the family Muscicapidae. It is found in Java and Bali. 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 lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is ...s. References Javan whistling thrush Birds of Java Birds of Bali Javan whistling thrush Taxonomy articles created by Polbot Endemic birds of Indonesia {{Muscicapidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passerine
A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped') which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their toes (three pointing forward and one back), which facilitates perching. With more than 140 families and some 6,500 identified species, Passeriformes is the largest order of birds and one of the most diverse clades of terrestrial vertebrates, representing 60% of birds.Ericson, P.G.P. et al. (2003Evolution, biogeography, and patterns of diversification in passerine birds ''J. Avian Biol'', 34:3–15.Selvatti, A.P. et al. (2015"A Paleogene origin for crown passerines and the diversification of the Oscines in the New World" ''Molecular Phylogenetics and Evolution'', 88:1–15. Passerines are divided into three suborders: New Zealand wrens; Suboscines, primarily found in North and South America; and songbirds. Passerines originated in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lumpers And Splitters
Lumpers and splitters are opposing factions in any academic discipline that has to place individual examples into rigorously defined categories. The lumper–splitter problem occurs when there is the desire to create classifications and assign examples to them, for example, schools of literature, biological taxa, and so on. A "lumper" is a person who assigns examples broadly, judging that differences are not as important as signature similarities. A "splitter" makes precise definitions, and creates new categories to classify samples that differ in key ways. Origin of the terms The earliest known use of these terms was thought to be Charles Darwin, in a letter to Joseph Dalton Hooker in 1857: "It is good to have hair-splitters & lumpers". But according to research done by the deputy director at NCSE, Glenn Branch, the credit is due to naturalist Edward Newman who wrote in 1845, "The time has arrived for discarding imaginary species, and the duty of doing this is as imperative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guinea, Indonesia is the world's largest archipelagic state and the List of countries and dependencies by area, 14th-largest country by area, at . With over 280 million people, Indonesia is the world's List of countries and dependencies by population, fourth-most-populous country and the most populous Islam by country, Muslim-majority country. Java, the world's List of islands by population, most populous island, is home to more than half of the country's population. Indonesia operates as a Presidential system, presidential republic with an elected People's Consultative Assembly, legislature and consists of Provinces of Indonesia, 38 provinces, nine of which have Autonomous administrative divisi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
