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Disruptive Pattern
Disruptive coloration (also known as disruptive camouflage or disruptive patterning) is a form of camouflage that works by breaking up the outlines of an animal, soldier or military vehicle with a strongly contrasting pattern. It is often combined with other methods of crypsis including background colour matching and countershading; special cases are coincident disruptive coloration and the disruptive eye mask seen in some fishes, amphibians, and reptiles. It appears paradoxical as a way of not being seen, since disruption of outlines depends on high contrast, so the patches of colour are themselves conspicuous. The importance of high-contrast patterns for successful disruption was predicted in general terms by the artist Abbott Thayer in 1909 and explicitly by the zoologist Hugh Cott in 1940. Later experimental research has started to confirm these predictions. Disruptive patterns work best when all their components match the background. While background matching works best ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Podargus Papuensis - Daintree River
''Podargus'' is a small genus of birds in the frogmouth family, Podargidae. All members of this genus are found in Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ..., with some species being found in Papua New Guinea, Indonesia, and the Solomon Islands, as well. It contains these species to date: Bird genera Taxa named by Louis Jean Pierre Vieillot Taxonomy articles created by Polbot {{Bird-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Oxybelis Aeneus (detail)
''Oxybelis aeneus'', commonly known as the Mexican vine snake or brown vine snake, is a species of colubrid snake, which is endemic to the Americas. Geographic range ''O. aeneus'' is found from southern Arizona in the United States, through Mexico, to northern South America and Trinidad and Tobago. Description ''O. aeneus'' is an extremely slender snake that reaches up to in total length (including a long tail). Its color may vary from gray to brown with a yellow underside. The body is laterally compressed. The snout is prominent, its length more than two times the diameter of the eye. There is 1 preocular, and there are 2 postoculars. There is 1 anterior temporal, and there are 2 posterior temporals. Boulenger, G.A. (1896). ''Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ) ...'' London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Egyptian Nightjar
The Egyptian nightjar (''Caprimulgus aegyptius'') is a medium-small nightjar which occurs in south west Asia and north Africa and winters in tropical Africa. This is a fairly common species with a wide distribution which faces no obvious threats apart from habitat destruction, so the International Union for Conservation of Nature has rated its conservation status as being of "least concern". Etymology The genus name ''Caprimulgus'' is derived from the Latin ''capra'', "nanny goat", and ''mulgere'', "to milk", referring to an old myth that nightjars suck milk from goats. The specific ''aegyptius'' is Latin for ''Egyptian''.". The common name "nightjar", first recorded in 1630, refers to the nocturnal habits of the bird, the second part of the name deriving from the distinctive churring song. Description The variegated plumage is much paler than the European nightjar. The adult is sand-colours, barred and streaked with buff and brown. The under parts are sandy or whitish. It is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Leopard
The leopard (''Panthera pardus'') is one of the five extant species in the genus '' Panthera'', a member of the cat family, Felidae. It occurs in a wide range in sub-Saharan Africa, in some parts of Western and Central Asia, Southern Russia, and on the Indian subcontinent to Southeast and East Asia. It is listed as Vulnerable on the IUCN Red List because leopard populations are threatened by habitat loss and fragmentation, and are declining in large parts of the global range. The leopard is considered locally extinct in Hong Kong, Singapore, South Korea, Jordan, Morocco, Togo, the United Arab Emirates, Uzbekistan, Lebanon, Mauritania, Kuwait, Syria, Libya, Tunisia and most likely in North Korea, Gambia, Laos, Lesotho, Tajikistan, Vietnam and Israel. Contemporary records suggest that the leopard occurs in only 25% of its historical global range. Compared to other wild cats, the leopard has relatively short legs and a long body with a large skull. Its fur is marked wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Caprimulgus Aegyptius
The Egyptian nightjar (''Caprimulgus aegyptius'') is a medium-small nightjar which occurs in south west Asia and north Africa and winters in tropical Africa. This is a fairly common species with a wide distribution which faces no obvious threats apart from habitat destruction, so the International Union for Conservation of Nature has rated its conservation status as being of "least concern". Etymology The genus name ''Caprimulgus'' is derived from the Latin ''capra'', "nanny goat", and ''mulgere'', "to milk", referring to an old myth that nightjars suck milk from goats. The specific ''aegyptius'' is Latin for ''Egyptian''.". The common name "nightjar", first recorded in 1630, refers to the nocturnal habits of the bird, the second part of the name deriving from the distinctive churring song. Description The variegated plumage is much paler than the European nightjar. The adult is sand-colours, barred and streaked with buff and brown. The under parts are sandy or whitish. It is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Animal Coloration (book)
''Animal Coloration'', or in full ''Animal Coloration: An Account of the Principal Facts and Theories Relating to the Colours and Markings of Animals'', is a book by the English zoologist Frank Evers Beddard, published by Swan Sonnenschein in 1892. It formed part of the Coloration evidence for natural selection, ongoing debate amongst zoologists about the relevance of Charles Darwin's theory of natural selection to the observed appearance, structure, and behaviour of animals, and vice versa. Beddard states in the book that it contains little that is new, intending instead to give a clear overview of the subject. The main topics covered are camouflage, then called 'protective coloration'; mimicry; and sexual selection. Arguments for and against these aspects of animal coloration are intensively discussed in the book. The book was reviewed in 1892 by the major journals including ''The Auk'', ''Nature'', and ''Science''. The scientist reviewers Joel Asaph Allen, Edward Bagnall Poul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Frank Evers Beddard
Frank Evers Beddard FRS FRSE (19 June 1858 – 14 July 1925) was an English zoologist. He became a leading authority on annelids, including earthworms. He won the Linnean Medal in 1916 for his book on oligochaetes. Life Beddard was born in Dudley, Worcestershire the son of John Beddard. He was educated at Harrow and New College, Oxford. He died at West Hampstead in London. Career Beddard was naturalist to the Challenger Expedition Commission from 1882 to 1884. In 1884 he was appointed prosector, responsible for preparing dissections of animals that had died, at the Zoological Society of London, following the death of William Alexander Forbes. Beddard became lecturer in biology at Guy's Hospital, examiner in zoology and comparative anatomy at the University of London, and lecturer in morphology at Oxford University. Apart from his publications on wide-ranging topics in zoology, such as Isopoda, Mammalia,Beddard, Frank Evers. (Edit: Harmer, Sir Sidney Frederic; Shipley, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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The Colours Of Animals
''The Colours of Animals'' is a zoology book written in 1890 by Sir Edward Bagnall Poulton (1856–1943). It was the first substantial textbook to argue the case for Darwinian selection applying to all aspects of animal coloration. The book also pioneered the concept of frequency-dependent selection and introduced the term "aposematism". The book begins with a brief account of the physical causes of animal coloration. The second chapter gives an overview of the book, describing the various uses of colour in terms of the advantages it can bring through natural selection. The next seven chapters describe camouflage, both in predators and in prey. Methods of camouflage covered include background matching, resemblance to specific objects such as bird droppings, self-decoration with materials from the environment, and the seasonal colour change of arctic animals. Two chapters cover warning colours, including both Batesian mimicry, where the mimic is edible, and Mullerian mimicry, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Edward Bagnall Poulton
Sir Edward Bagnall Poulton, FRS HFRSE FLS (27 January 1856 – 20 November 1943) was a British evolutionary biologist, a lifelong advocate of natural selection through a period in which many scientists such as Reginald Punnett doubted its importance. He invented the term sympatric for evolution of species in the same place, and in his book '' The Colours of Animals'' (1890) was the first to recognise frequency-dependent selection. Poulton is also remembered for his pioneering work on animal coloration. He is credited with inventing the term aposematism for warning coloration, as well as for his experiments on 'protective coloration' (camouflage). Poulton became Hope Professor of Zoology at the University of Oxford in 1893. Life Edward Poulton was born in Reading, Berkshire on 27 January 1856 the son of the architect William Ford Poulton and his wife, Georgina Sabrina Bagnall. He was educated at Oakley House School in Reading. Between 1873 and 1876, Poulton studied at Jes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Darwinism (book)
''Darwinism: An Exposition of the Theory of Natural Selection with Some of Its Applications'' is an 1889 book on evolution by Alfred Russel Wallace, the co-discoverer of evolution by natural selection together with Charles Darwin. This was a book Wallace wrote as a defensive response to the scientific critics of natural selection. Of all Wallace's books, it is cited by scholarly publications the most. Synopsis In ''Darwinism'' fifteen chapters, Alfred Russel Wallace sets out his understanding of the theory of evolution by natural selection. He begins by defining "species", discussing creationism, opinion before Charles Darwin, and Darwin's theory. He then describes the Malthusian struggle for existence, given the ability of organisms to reproduce in a world of finite resources. He explains the importance of variability within species, giving examples. He describes variation in domesticated animals and cultivated plants, and the process of artificial selection by breeders. Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Alfred Russel Wallace
Alfred Russel Wallace (8 January 1823 – 7 November 1913) was a British naturalist, explorer, geographer, anthropologist, biologist and illustrator. He is best known for independently conceiving the theory of evolution through natural selection. His 1858 paper on the subject was published that year alongside extracts from Charles Darwin's earlier writings on the topic. It spurred Darwin to set aside the "big species book" he was drafting, and quickly write an abstract of it, published in 1859 as '' On the Origin of Species''. Wallace did extensive fieldwork, first in the Amazon River basin. He then did fieldwork in the Malay Archipelago, where he identified the faunal divide now termed the Wallace Line, which separates the Indonesian archipelago into two distinct parts: a western portion in which the animals are largely of Asian origin, and an eastern portion where the fauna reflect Australasia. He was considered the 19th century's leading expert on the geographical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |