Wednesday 14 August 2013

Elephant Cartoon Pictures Images Pics Photos Wallpapers Pictures

Elephant Cartoon Pictures Biography
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Elephants are large mammals of the family Elephantidae and the order Proboscidea. Traditionally, two species are recognised, the African elephant (Loxodonta africana) and the Asian elephant (Elephas maximus), although some evidence suggests that African bush elephants and African forest elephants are separate species (L. africana and L. cyclotis respectively). Elephants are scattered throughout sub-Saharan Africa, and South and Southeast Asia. They are the only surviving proboscideans; extinct species include mammoths and mastodons. The largest living terrestrial animals, male African elephants can reach a height of 4 m (13 ft) and weigh 7,000 kg (15,000 lb). These animals have several distinctive features, including a long proboscis or trunk used for many purposes, particularly for grasping objects. Their incisors grow into tusks, which serve as tools for moving objects and digging and as weapons for fighting. The elephant's large ear flaps help to control the temperature of its body. African elephants have larger ears and concave backs while Asian elephants have smaller ears and convex or level backs.Elephants are herbivorous and can be found in different habitats including savannahs, forests, deserts and marshes. They prefer to stay near water. They are considered to be keystone species due to their impact on their environments. Other animals tend to keep their distance, and predators such as lions, tigers, hyenas and wild dogs usually target only the young elephants (or "calves"). Females ("cows") tend to live in family groups, which can consist of one female with her calves or several related females with offspring. The groups are led by an individual known as the matriarch, often the oldest cow. Elephants have a fission-fusion society in which multiple family groups come together to socialise. Males ("bulls") leave their family groups when they reach puberty, and may live alone or with other males. Adult bulls mostly interact with family groups when looking for a mate and enter a state of increased testosterone and aggression known as musth, which helps them gain dominance and reproductive success. Calves are the centre of attention in their family groups and rely on their mothers for as long as three years. Elephants can live up to 70 years in the wild. They communicate by touch, sight, smell and sound; elephants use infrasound, and seismic communication over long distances. Elephant intelligence has been compared with that of primates and cetaceans. They appear to have self-awareness and show empathy for dying or dead individuals of their kind.African elephants are listed as vulnerable by the International Union for Conservation of Nature (IUCN), while the Asian elephant is classed as endangered. One of the biggest threats to elephant populations is the ivory trade, as the animals are poached for their ivory tusks. Other threats to wild elephants include habitat destruction and conflicts with local people. Elephants are used as working animals in Asia. In the past they were used in war; today, they are often put on display in zoos and circuses. Elephants are highly recognisable and have been featured in art, folklore, religion, literature and popular culture.The word "elephant" is based on the Latin elephantus ("elephant"), which is the Latinised form of the Greek ἐλέφαντος (elephantos), genitive of ἐλέφας (elephas),[1] probably from a non-Indo-European language, likely Phoenician.[2] It is attested in Mycenaean Greek as e-re-pa and e-re-pa-to in Linear B syllabic script.[3][4] As in Mycenaean Greek, Homer used the Greek word to mean ivory, but after the time of Herodotus, it also referred to the animal.[1] The word "elephant" appears in Middle English as olyfaunt (c.1300) and was borrowed from Old French oliphant (12th century).[2] In Swahili elephants are known as Ndovu or Tembo. In Sanskrit the elephant is called Hastin,[5] while in Hindi it is known as Hathi (हाथी).[6] Loxodonta, the generic name for the African elephants, is Greek for "oblique-sided tooth".[7]See also: List of elephant speciesAsian elephant in Bandipur National Park, IndiaComparative morphology of head and forepart of the body of the Asian elephant (1) and the African elephant (2)Elephants belong to the Elephantidae, the sole family within the order Proboscidea. Their closest extant relatives are the sirenians (dugongs and manatees) and the hyraxes, with which they share the clade Paenungulata within the superorder Afrotheria.[8] Elephants and sirenians are further grouped in the clade Tethytheria.[9] Traditionally, two species of elephants are recognised; the African elephant (Loxodonta africana) of sub-Saharan Africa, and the Asian elephant (Elephas maximus) of South and Southeast Asia. African elephants have larger ears, a concave back, more wrinkled skin, a sloping abdomen and two finger-like extensions at the tip of the trunk. Asian elephants have smaller ears, a convex or level back, smoother skin, a horizontal abdomen that occasionally sags in the middle and one extension at the tip of the trunk. The looped ridges on the molars are narrower in the Asian elephant while those of the African are more diamond-shaped. The Asian elephant also has dorsal bumps on its head and some patches of depigmentation on its skin.[10]Swedish zoologist Carl Linnaeus first described the genus Elephas and an elephant from Sri Lanka (then known as Ceylon) under the binomial Elephas maximus in 1758. In 1798, Georges Cuvier classified the Indian elephant under the binomial Elephas indicus. Dutch zoologist Coenraad Jacob Temminck described the Sumatran elephant in 1847 under the binomial Elephas sumatranus. English zoologist Frederick Nutter Chasen classified all three as subspecies of the Asian elephant in 1940.[11] Asian elephants vary geographically in their colour and amount of depigmentation. The Sri Lankan elephant (Elephas maximus maximus) inhabits Sri Lanka, the Indian elephant (E. m. indicus) is native to mainland Asia (on the Indian subcontinent and Indochina), and the Sumatran elephant (E. m. sumatranus) is found in Sumatra.[10] One disputed subspecies, the Borneo elephant, lives in northern Borneo and is smaller than all the other subspecies. It has larger ears, a longer tail, and straighter tusks than the typical elephant. Sri Lankan zoologist Paules Edward Pieris Deraniyagala described it in 1950 under the trinomial Elephas maximus borneensis, taking as his type an illustration in National Geographic.[12] It was subsequently subsumed under either E. m. indicus or E. m. sumatranus. Results of a 2003 genetic analysis indicate its ancestors separated from the mainland population about 300,000 years ago.[13] A 2008 study found that Borneo elephants are not indigenous to the island but were brought there before 1521 by the Sultan of Sulu from Java, where elephants are now extinct.[12]African forest elephant in Ivindo National Park, GabonThe African elephant was first named by German naturalist Johann Friedrich Blumenbach in 1797 as Elephas africana.[14] The genus Loxodonta was commonly believed to have been named by Georges Cuvier in 1825. Cuvier spelled it Loxodonte and an anonymous author romanised the spelling to Loxodonta; the International Code of Zoological Nomenclature recognises this as the proper authority.[15] In 1942, 18 subspecies of African elephant were recognised by Henry Fairfield Osborn, but further morphological data has reduced the number of classified subspecies,[16] and by the 1990s, only two were recognised, the savannah or bush elephant (L. a. africana) and the forest elephant (L. a. cyclotis);[17] the latter has smaller and more rounded ears and thinner and straighter tusks, and is limited to the forested areas of western and Central Africa.[18] A 2000 study argued for the elevation of the two forms into separate species (L. africana and L. cyclotis respectively) based on differences in skull morphology.[19] DNA studies published in 2001 and 2007 also suggested they were distinct species,[20][21] while studies in 2002 and 2005 concluded that they were the same species.[22][23] A 2010 study further supported African savannah and forest elephants' status as separate species.[24] As of 2011, the taxonomic designations of African elephants were still debated.[25] The third edition of Mammal Species of the World lists the two forms as full species[15] and does not list any subspecies in its entry for Loxodonta africana.[15] This approach is not taken by the United Nations Environment Programme's World Conservation Monitoring Centre nor by the IUCN, both of which list L. cyclotis as a synonym of L. africana.[26][27] Some evidence suggests that elephants of western Africa are a separate species,[28] although this is disputed.[23][25] The pygmy elephants of the Congo Basin, which have been suggested to be a separate species (Loxodonta pumilio) are probably forest elephants whose small size and/or early maturity are due to environmental conditions.[29]

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Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures
Images Pics Photos Wallpapers Pictures

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