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Asian elephant

Asian elephant[1]
Temporal range: Late Pliocene – recent[2]
A male Asian elephant in the wild at Bandipur National Park in India
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Elephas
Species: E. maximus
Binomial name
Elephas maximus
Linnaeus, 1758
Asian elephant range
(brown—native, black—origin uncertain)

The Asian or Asiatic elephant (Elephas maximus) is the only living species of the genus Elephas and is distributed in Southeast Asia from India in the west to Borneo in the east. Three subspecies are recognized—Elephas maximus maximus from Sri Lanka, the Indian elephant or E. m. indicus from mainland Asia, and E. m. sumatranus from the island of Sumatra.[1] Asian elephants are the largest living land animals in Asia.[4]

Since 1986, E. maximus has been listed as endangered by IUCN as the population has declined by at least 50% over the last three generations, estimated to be 60–75 years. Asian elephants are primarily threatened by degradation, fragmentation and loss of habitat, and poaching.[3] In 2003, the wild population was estimated at between 41,410 and 52,345 individuals. Female captive elephants have lived beyond 60 years when kept in semi-natural surroundings, such as forest camps. In zoos, elephants die at a much younger age and are declining due to a low birth and high death rate.[5]

The genus Elephas originated in Sub-Saharan Africa during the Pliocene, and ranged throughout Africa into southern Asia.[2] The earliest indications of captive use of Asian elephants are engravings on seals of the Indus Valley civilization dated to the third millennium BC.[6]


  • Characteristics 1
    • Size 1.1
    • Trunk 1.2
    • Tusks 1.3
    • Skin 1.4
    • Intelligence 1.5
  • Distribution and habitat 2
  • Ecology and behavior 3
    • Reproduction 3.1
  • Interaction with humans 4
    • Domestication 4.1
  • Threats 5
    • Human–elephant conflict 5.1
    • Poaching 5.2
    • Handling methods 5.3
  • Conservation 6
    • In captivity 6.1
  • Taxonomy 7
  • In culture 8
  • See also 9
  • References 10
  • Further reading 11
  • External links 12


Illustration of an elephant skeleton[7]

In general, the Asian elephant is smaller than the African elephant and has the highest body point on the head. The back is convex or level. The ears are small with dorsal borders folded laterally. It has up to 20 pairs of ribs and 34 caudal vertebrae. The feet have more nail-like structures than those of African elephants—five on each forefoot, and four on each hind foot.[4]


As is common with large animals, the dimensions of the Asian elephant are often exaggerated. On average, the shoulder height of males rarely exceeds 2.7 m (9 ft) and that of the females, 2.4 m (8 ft).[7] Average height of females is 2.24 m (7.3 ft), and average weight 2.72 t (3.00 short tons) rarely exceeding 4.16 t (4.59 short tons). Large bulls weigh up to 5.4 t (6.0 short tons) and are 3.2 m (10 ft) at the shoulder. Length of body and head including trunk is 5.5–6.5 m (18–21 ft) with the tail being 1.2–1.5 m (3.9–4.9 ft) long.[4] The largest bull elephant ever recorded was shot by the Maharajah of Susang in the Garo Hills of Assam, India in 1924, it weighed 8 tonnes (8.8 short tons), stood 3.35 m (11 ft) tall at the shoulders and was 8.06 m (26.4 ft) long from head to tail.[8] There are reports of larger individuals as tall as 3.7 m (12 ft).[7]


Indian elephant drinking water

The distinctive trunk is an elongation of the nose and upper lip combined; the nostrils are at its tip, which has a one finger-like process. The trunk contains as many as 60,000 muscles, which consist of longitudinal and radiating sets. The longitudinals are mostly superficial and subdivided into anterior, lateral, and posterior. The deeper muscles are best seen as numerous distinct

  • Save Elephant Foundation
  • International Elephant Foundation
  • Protecting the Asian elephantElefantAsia:
  • Asian Elephants at the Zoological Gardens of the World
  • Elephant Information Repository
  • WWF—Asian elephant species profile
  • National Zoo Facts on Asian Elephant and a Webcam of the Asian Elephant exhibit
  • Elephants : Illegal Wildlife TradeEnvironmental Investigation Agency:

External links

  • Gilchrist, W. (1851) A Practical Treatise on the Treatment of the Diseases of the Elephant, Camel & Horned Cattle: with instructions for improving their efficiency; also, a description of the medicines used in the treatment of their diseases; and a general outline of their anatomy. Calcutta: Military Orphan Press
  • Miall, L. C., Greenwood, F. (1878). Anatomy of the Indian Elephant. London: Macmillan and Co. 

Further reading

  1. ^ a b  
  2. ^ a b Haynes, G. (1993). Mammoths, mastodonts, and elephants: biology, behavior, and the fossil record. Cambridge University Press, Cambridge, ISBN 0521456916
  3. ^ a b c d e Choudhury, A., Lahiri Choudhury, D.K., Desai, A., Duckworth, J.W., Easa, P.S., Johnsingh, A.J.T., Fernando, P., Hedges, S., Gunawardena, M., Kurt, F., Karanth, U., Lister, A., Menon, V., Riddle, H., Rübel, A., Wikramanayake, E. (2008). "Elephas maximus".  
  4. ^ a b c d e f g h i j Shoshani, J, Eisenberg, J. F.; Eisenberg (1982). "Elephas maximus". Mammalian Species 182 (182): 1–8.  
  5. ^ Sukumar, R. (2003). The Living Elephants: Evolutionary Ecology, Behavior, and Conservation. Oxford University Press, Oxford, UK.  
  6. ^ a b Sukumar, R. (1993). The Asian Elephant: Ecology and Management Second edition. Cambridge University Press. ISBN 0-521-43758-X
  7. ^ a b c d Lydekker, R. (1894). The Royal Natural History. Volume 2. Frederick Warne and Co., London. 
  8. ^ Wood, G.L. (1982) The Guinness book of animal facts and feats. Guinness Superlatives. ISBN 0-85112-235-3
  9. ^ Rasmussen, L. E. L. (2006) Chemical, Tactile, and Taste Sensory SystemsChapter 32. . In: Fowler, M. E., Mikota, S. K. Biology, medicine, and surgery of elephants. Wiley-Blackwell, Oxford, UK. ISBN 978-0-8138-0676-1. pp. 409 ff.
  10. ^ Spinage, C. A. (1994). Elephants. London: T & A D Poyser.  
  11. ^ Clutton-Brock, J. (1987). A Natural History of Domesticated Mammals. London: British Museum (Natural History). p. 208.  
  12. ^ Aldous, P. (2006-10-30). "Elephants see themselves in the mirror". New Scientist. 
  13. ^ Hart, B.L., Hart, L.A., McCoy, M., Sarath, C.R.; Hart; McCoy; Sarath (November 2001). "Cognitive behaviour in Asian elephants: use and modification of branches for fly switching". Animal Behaviour (Academic Press) 62 (5): 839–847.  
  14. ^ Choudhury, A. U. (1999). Status and Conservation of the Asian elephant Elephas maximus in north-eastern India. Mammal Review 29: 141–173.
  15. ^ Alfred, R., Ahmad, A. H., Payne, J., William, C., Ambu, L. (2010). ) in Sabah"Elephas maximus borneensis"Density and population estimation of the Bornean elephants (. Online Journal of Biological Sciences 10 (2): 92–102.  
  16. ^ Fernando P., Vidya T.N.C., Payne J., Stuewe M., Davison G. Alfred, R.J., Andau, P. Bosi, E. Kilbourn, A. Melnick, D.J.; Vidya; Payne; Stuewe; Davison; Alfred; Andau; Bosi; Kilbourn; Melnick (2003). "DNA Analysis indicates that Asian Elephants are native to Borneo and are therefore a High Priority for Conservation". PLoS Biol 1 (1): e6.  
  17. ^ Samansiri, K. A. P.; Weerakoon, D. K. (2007). "Feeding Behaviour of Asian Elephants in the Northwestern Region of Sri Lanka". Gajah: Journal of the IUCN/SSC Asian Elephant Specialist Group 2: 27–34. 
  18. ^ Sukumar, R. (1990). "Ecology of the Asian Elephant in southern India. II. Feeding habits and crop raiding patterns". Journal of Tropical Ecology 6: 33–53.  
  19. ^ Pradhan, N. M. B.; Wegge, P.; Moe, S. R.; Shrestha, A. K. (2008). "Feeding ecology of two endangered sympatric megaherbivores: Asian elephant Elephas maximus and greater one-horned rhinoceros Rhinoceros unicornis in lowland Nepal". Wildlife Biology 14: 147–154.  
  20. ^ McKay, G. M. (1973). "Behavior and ecology of the Asiatic elephant in southeastern Ceylon". Smithsonian Contributions to Zoology 125 (125): 1–113.  
  21. ^ Fernando, P.; Lande, R. (2000). "Molecular genetic and behavioral analysis of social organization in the Asian elephant (Elephas maximus)". Behav Ecol Sociobiol 48 (1): 84–91.  
  22. ^ a b de Silva, S.; Wittemyer, G. (2012). "A Comparison of Social Organization in Asian Elephants and African Savannah Elephants". International Journal of Primatology. Forthcoming (5): 1125.  
  23. ^ de Silva, S.; Ranjeewa, A. D. G.; Kryazhimskiy, S. (2011). "The dynamics of social networks among female Asian elephants". BMC Ecology 11: 17.  
  24. ^ Heffner, R.; Heffner, H. (1980). )"Elephas maximus"Hearing in the elephant (.  
  25. ^ Payne, K. (1998). Silent Thunder. Simon & Schuster.  
  26. ^ Karanth, K. U. and Nichols, J. D. (1998). "Estimation of tiger densities in India using photographic captures and recaptures". Ecology 79 (8): 2852–2862.  
  27. ^ "Tiger kills elephant at Eravikulam park". The New Indian Express. 2009. 
  28. ^ "Tiger kills mother, baby elephant". Elephant News. 2006. 
  29. ^ Jainudeen, M. R.; McKay, G. M.; Eisenberg, J. F. (1972). "Observation on musth in the domesticated Asiatic elephant (Elephas maximus)". Mammalia 36 (2): 247–261.  
  30. ^ Khyne, U. M. (2002). "The studbook of timber elephants of Myanmar with special reference to survivorship analysis". Proceedings of the International Workshop on the Domesticated Asian Elephant. 
  31. ^ Rasmussen, L. E. L.; Lee, T. D.; Zhang, A. J.; Roelofs, W. L.; Daves, G. D. (1997). "Purification, identification, concentration and bioactivity of (Z)-7-dodecen-1-yl acetate: sex pheromone of the female Asian elephant, Elephas maximus". Chemical Senses 22 (4): 417–437.  
  32. ^ Rasmussen, L. E. L.; Lee, T. D.; Roelofs, W. L.; Zhang, A. J.; Daves, G. D. (1996). "Insect pheromone in elephants".  
  33. ^ Salmoni, Dave World's Deadliest Towns: Man-Eating Elephant.
  34. ^ McIntosh, J. (2008) The ancient Indus Valley: new perspectives. ABC-CLIO.
  35. ^ Rangarajan, M. (2001) The Forest and the Field in Ancient India. In: India's Wildlife History. Permanent Black, Delhi
  36. ^ a b Choudhury, A. U. (2004). "Human–Elephant Conflicts in Northeast India". Human Dimensions of Wildlife 9 (4): 261.  
  37. ^ Fernando, P. (2000). "Elephants in Sri Lanka: past present and future". Loris 22 (2): 38–44. 
  38. ^ a b c Barua, M. (2010). "Whose issue? Representations of human-elephant conflict in Indian and international media". Science Communication 32: 55.  
  39. ^ Choudhury, A. U. (2007). Impact of border fence along India – Bangladesh border on elephant movement. Gajah 26: 27–30.
  40. ^ Rangarajan, M., Desai, A., Sukumar, R., Easa, P. S., Menon, V., Vincent, S., Ganguly, S., Talukdar, B. K., Singh, B., Mudappa, D., Chowdhary, S., Prasad, A. N. (2010). Gajah: Securing the future for elephants in India. Report of the Elephant Task Force. Ministry of Environment and Forests, New Delhi.
  41. ^ Bist, S. S. (2006). "Elephant conservation in India – an overview". Gajah 25: 27–35. 
  42. ^ a b Stiles, D. (2009). The elephant and ivory trade in Thailand. TRAFFIC Southeast Asia, Petaling Jaya, Selangor, Malaysia.
  43. ^ Stiles, D. (2009). "The status of ivory trade in Thailand and Vietnam". TRAFFIC Bulletin 22 (2): 83–91. 
  44. ^ "Tourism driving illegal elephant trade in Burma and Thailand – video". 24 July 2012. 
  45. ^ Hile, J. (2002). "Activists Denounce Thailand's Elephant "Crushing" Ritual".  
  46. ^ a b Barua, M., Tamuly, J., Ahmed, R.A.; Tamuly; Ahmed (2010). "Mutiny or Clear Sailing? Examining the Role of the Asian Elephant as a Flagship Species". Human Dimensions of Wildlife 15 (2): 145.  
  47. ^ a b Bowen-Jones, E.; Entwistle, A. (2002). "Identifying appropriate flagship species: The importance of culture and local contexts".  
  48. ^ Clubb, R., Rowcliffe, M., Lee, P., Mar, K. U., Moss, C. and Mason, G. J. (2008). "Compromised Survivorship in Zoo Elephants". Science 322 (5908): 1649.   full text mirror
  49. ^ Wiese, R. J. (2000). "Asian elephants are not self-sustaining in North America". Zoo Biology 19 (5): 299.  
  50. ^ Saragusty, J., Hermes, R., Goritz, F,. Schmitt, D.L., Hildebrandt, T. B.; Hermes; Göritz; Schmitt; Hildebrandt (2009). "Skewed Birth Sex Ratio and Premature Mortality in Elephants". Animal Reproduction Science 115 (1–4): 247–254.  
  51. ^ Linnaei, C. (1760) Elephas maximus In: Caroli Linnæi Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Halae Magdeburgicae. Page 33
  52. ^ Cuvier, G. (1798) Tableau elementaire de l’histoire naturelle des animaux. Baudouin, Paris
  53. ^ Temminck, C. J. (1847) Coup-d'oeil général sur les possessions néerlandaises dans l'Inde archipélagique. Tome second. A. Arnz and Comp., Leide
  54. ^ Chasen, F.H. (1940) A handlist of Malaysian mammals. Bulletin of the Raffles Museum 15: iii–209.
  55. ^ Cranbrook, E., Payne, J., Leh, C.M.U. (2008) Origin of the elephants Elephas maximus L. of Borneo. Sarawak Museum Journal.
  56. ^ Fernando, P.; Vidya, T. N. C.; Payne, J.; Stuewe, M.; Davison, G.; Alfred, R. J.; Andau, P.; Bosi, E.; Kilbourn, A. et al. et al. (2003). "DNA Analysis Indicates That Asian Elephants Are Native to Borneo and Are Therefore a High Priority for Conservation". PLoS Biol 1 (1): e6.  
  57. ^ Elefantasia 2008, ''Assist Us'', 1 January 2008. Retrieved on 2013-09-27.
  58. ^ Nilakantha, of (1985). The Elephant-Lore of the Hindus: the Elephant-sport (Matanga-lila) (Repr.; of 1931 ed.). Delhi: Motilal Banarsidass.  


See also

The elephant is depicted in several Indian manuscripts and treatises. Notable amongst these is the Matanga Lila ("Elephant sport")[58] of Rameswara Pandita and the Hastividyarnava of Sukumar Barkaith. The latter manuscript is from Assam in northeast India.

The elephant plays an important part in the culture of the subcontinent and beyond, featuring prominently in Jataka tales and the Panchatantra. They play a major role in Hinduism: the god Ganesha's head is that of an elephant, and the "blessings" of a temple elephant are highly valued. Elephants have been used in processions in Kerala, where the animals are adorned with festive outfits.

A folio from the Hastividyarnava manuscript

In culture

  • The Chinese elephant is sometimes separated as E. m. rubridens (pink-tusked elephant); it disappeared after the 14th century BC.
  • The Syrian elephant (E. m. asurus), the westernmost and the largest subspecies of the Asian elephant, became extinct around 100 BC. This population, along with the Indian elephant, was considered the best war elephant in antiquity, and was found superior to the smallish North African elephant (Loxodonta africana pharaoensis) used by the armies of Carthage.

The population in Vietnam and Laos was tested to determine if it is a subspecies, as well. This research is considered vital, as less than 1300 wild Asian elephants remain in Laos.[57] In addition, two extinct subspecies are considered to have existed:

In 1950, Paules Edward Pieris Deraniyagala described the Borneo elephant under the trinomial Elephas maximus borneensis, taking as his type an illustration in the National Geographical Magazine, but not a living elephant in accordance with the rules of the International Code of Zoological Nomenclature.[55] E. m. borneensis lives in northern Borneo and is smaller than all the other subspecies, but with larger ears, a longer tail, and straight tusks. Results of genetic analysis indicate that its ancestors separated from the mainland population about 300,000 years ago.[56]

[54] classified all three as subspecies of the Asian elephant in 1940.Frederick Nutter Chasen [53].Elephas sumatranus first described the Sumatran elephant under the binomial Coenraad Jacob Temminck In 1847, [52]

Borneo elephant
Sri Lankan elephants


Demographic analysis of the captive Asian elephants in North America indicates that the population is not self-sustaining. First year mortality is nearly 30%, and the fecundity is extremely low throughout the prime reproductive years.[49] Data from North American and European regional studbooks from 1962 to 2006 were analysed for deviation of the birth and juvenile death sex ratio. Of 349 captive calves born, 142 died prematurely. They died within 1 month of birth; major causes being stillbirth and infanticide by either the calf's own mother or by one of the exhibition mates. The sex ratio of stillbirths in Europe was found to have a tendency for excess of males.[50]

About half of the global zoo elephant population is kept in European zoos, where they have about half the median life span of conspecifics in protected populations in range countries. This discrepancy is clearest in Asian elephants: infant mortality is twice that seen in Burmese timber camps, and its adult survivorship in zoos has not improved significantly in recent years. One risk factor for Asian zoo elephants is being moved between institutions, with early removal from the mother tending to have additional adverse effects. Another risk factor is being born into a zoo rather than being imported from the wild, with poor adult survivorship in zoo-born Asians apparently being conferred prenatally or in early infancy. Likely causes for compromised survivorship is stress and/or obesity.[48]

This stereotypical rhythmic swaying behaviour is not reported in free ranging wild elephants, and may be symptomatic of psychological disorders.

In captivity

  • habitat conservation at landscape scales[46][47]
  • generating public awareness of conservation issues[38]
  • mobilization as a popular cultural icon both in India and the West[46][47]

Asian elephants are quintessential flagship species, deployed to catalyze a range of conservation goals, including:

Elephas maximus is listed on CITES Appendix I.[3]


The calves are often subjected to a 'breaking in' process, which may involve being tied up, confined, starved, beaten and tortured; as a result, two-thirds may perish.[44] Handlers use a technique known as the training crush, in which "handlers use sleep-deprivation, hunger, and thirst to "break" the elephants' spirit and make them submissive to their owners"; moreover, handlers drive nails into the elephants' ears and feet.[45]

Young elephants are captured and illegally imported to Thailand from Myanmar for use in the tourism industry; calves are used mainly in amusement parks and are trained to perform various stunts for tourists.[42]

Handling methods

Up to the early 1990s, Vietnamese ivory craftsmen used exclusively Asian elephant ivory from Vietnam and neighbouring Lao PDR and Cambodia. Before 1990, there were few tourists and the low demand for worked ivory could be supplied by domestic elephants. Economic liberalization and an increase in tourism raised both local and visitors’ demands for worked ivory, which resulted in heavy poaching.[43]

The demand for ivory as a result of rapid economic development during the 1970s and 1980s, particularly in East Asia, led to rampant poaching and the serious decline of elephants in many Asian and African range countries. In Thailand, the illegal trade in live elephants and ivory still flourishes. Although the quantity of worked ivory seen openly for sale has decreased substantially since 2001, Thailand still has one of the largest and most active ivory industries seen anywhere in the world. Tusks from Thai poached elephants also enter the market; between 1992 and 1997 at least 24 male elephants were killed for their tusks.[42]

Ivory chopsticks
18th century ivory powder flask


Development such as border fencing along the India-Bangladesh border has become a major impediment to the free movement of elephants.[39] In Assam, more than 1,150 humans and 370 elephants died as a result of human-elephant conflict between 1980 and 2003.[36] In India alone, over 400 people are killed by elephants every year, and 0.8 to 1 million hectares are damaged, affecting at least 500,000 families across the country.[40] Moreover, elephants are known to destroy crops worth up to US$2–3 million annually.[41] This has major impacts on the welfare and livelihoods of local communities, as well as the future conservation of this species.[38]

  • ultimate causes including growing human population, large-scale development projects and poor top-down governance;
  • proximate causes including habitat loss due to deforestation, disruption of elephant migratory routes, expansion of agriculture and illegal encroachment into protected areas.

Human-elephant conflict is categorized into:[38]

One of the major instigators of human–wildlife conflict is competition for space. Depredation in human settlements is another major area of human–elephant conflict occurring in small forest pockets, encroachments into elephant habitat, and on elephant migration routes.[36] Studies in Sri Lanka indicate that traditional slash-and-burn agriculture creates optimal habitat for elephants by creating a mosaic of successional-stage vegetation. Populations inhabiting small habitat fragments are much more liable to come into conflict with humans.[37]

A sign stating "Beware of the Elephant" along highway 12 in Nam Nao National Park, Thailand
Prime elephant habitat cleared for jhum—a type of shifting cultivation practiced in Arunachal Pradesh

Human–elephant conflict

The pre-eminent threats to Asian elephants today are loss, degradation and fragmentation of habitat, leading in turn to increasing conflicts between humans and elephants. They are poached for ivory and a variety of other products including meat and leather.[3]


Elephants have been captured from the wild and tamed for use by humans. Their ability to work under instruction makes them particularly useful for carrying heavy objects. They have been used particularly for timber-carrying in jungle areas. Other than their work use, they have been used in war, in ceremonies, and for carriage. They have been used for their ability to travel over difficult terrain by hunters, for whom they served as mobile hunting platforms. The same purpose is met in safaris in modern times.

The first historical record of the domestication of Asian elephants was in Harappan times.[34] Ultimately, the elephant went on to become a siege engine, a mount in war, a status symbol, a beast of burden, and an elevated platform for hunting during historical times in South Asia.[35]


At most seasons of the year, Asian elephants are timid and much more ready to flee from a foe than to attack. However, solitary rogues are frequently an exception to this rule, and sometimes make unprovoked attacks on passers-by. Rogue elephants sometimes take up a position near a road, making it impassable to travelers. Females with calves are at all times dangerous to approach. When an Asian elephant makes a charge, it tightly curls up its trunk and attacks by trampling its victim with feet or knees, or, if a male, by pinning it to the ground with its tusks. During musth, bulls are highly dangerous, not only to human beings, but also to other animals. At the first indications, trained elephants are secured tightly to prevent any mishaps. There is also one case of a rogue elephant having actually consumed a human, an attack merited to be extremely unnatural. The elephant, a rogue female, had previously lost her calf to an accident involving farmers. This grievous loss led the elephant to target humans first as a threat, and then as a food source as her mental state deteriorated until she was finally killed and later dissected, revealing through DNA analysis that she had indeed consumed human flesh. The incident was revealed to the general public in several articles and in the Animal Planet documentary "World's Deadliest Towns: Man-Eating Elephant".[33]

At this elephant training camp, captive elephants are taught to handle logs.
Sri Lankan elephants at Esala Perahera
Mahouts washing an elephant, Thrissur, Kerala
Elephants are used for safari tourism throughout Asia

Interaction with humans

Females produce sex pheromones; a principal component thereof, (Z)-7-dodecen-1-yl acetate, has also been found to be a sex pheromone in numerous species of insects.[31][32]

Asiatic elephants reach adulthood at 17 years of age in both sexes.[30] Elephants' life expectancy has been exaggerated in the past; they live on average for 60 years in the wild and 80 in captivity.[4]

The gestation period is 18–22 months, and the female gives birth to one calf, only occasionally twins. The calf is fully developed by the 19th month, but stays in the womb to grow so that it can reach its mother to feed. At birth, the calf weighs about 100 kg (220 lb), and is suckled for up to three years. Once a female gives birth, she usually does not breed again until the first calf is weaned, resulting in a 4- to 5-year birth interval. Females stay on with the herd, but mature males are chased away.

Bulls will fight one another to get access to estrous females. Strong fights over access to females are extremely rare. Bulls reach sexual maturity around the age of 12–15. Between the age of 10 and 20 years, bulls undergo an annual phenomenon known as "musth". This is a period where the testosterone level is up to 100 times greater than nonmusth periods, and they become extremely aggressive. Secretions containing pheromones occur during this period, from the paired temporal glands located on the head between the lateral edge of the eye and the base of the ear.[29]

A calf with its mother in a conservation center in Laos
Indian elephants in the Coimbatore Forests, Tamil Nadu


Tiger predation on Asian elephants is rare but is not restricted only to small calves.[26][27][28]

Elephants are able to distinguish low amplitude sounds.[24] They use infrasound to communicate; this was first noted by the Indian naturalist Krishnan and later studied by Payne.[25]

Cow-calf unit sizes generally tend to be small, typically consisting of three adult females which are most likely related,[21] and their offspring; however, larger groups containing as many as 15 adult females may occur.[22] There can also be seasonal aggregations containing 100 individuals at a time, including calves and subadults. Until recently, Asian elephants, like African elephants, were thought to typically follow the leadership of older adult females, or matriarchs, but females can form extensive and very fluid social networks, with individual variation in the degree of gregariousness.[23] Social ties generally tend to be weaker than in African elephants.[22]

Adult females and calves may move about together as groups, but adult males disperse from their mothers upon reaching adolescence. Bull elephants may be solitary or form temporary 'bachelor groups'.[20]

Elephants are crepuscular.[4] They are classified as megaherbivores and consume up to 150 kg (330 lb) of plant matter per day.[17] They are generalist feeders, and both grazers and browsers, and were recorded to feed on 112 different plant species, most commonly of the order Malvales, and the legume, palm, sedge and true grass families.[18] They browse more in the dry season with bark constituting a major part of their diet in the cool part of that season.[19] They drink at least once a day and are never far from a permanent source of fresh water.[4] They need 80–200 litres of water a day and use even more for bathing. At times, they scrape the soil for clay or minerals.

A 5-month-old calf and its 17-month-old cousin in a sanctuary in Laos

Ecology and behavior

The Borneo elephant occurs in Borneo's northern and northeastern parts.[15] In 2003, mitochondrial DNA analysis and microsatellite data indicated that the Borneo elephant population is derived from stock that originated in the region of the Sunda Islands. The genetic divergence of Borneo elephants warrants their recognition as a separate Evolutionary Significant Unit.[16]

Three subspecies are recognized:[3][4]

Asian elephants inhabit grasslands, tropical evergreen forests, semi-evergreen forests, moist deciduous forests, dry deciduous forests and dry thorn forests, in addition to cultivated and secondary forests and scrublands. Over this range of habitat types elephants occur from sea level to over 3,000 m (9,800 ft). In the Eastern Himalaya in northeast India, they regularly move up above 3,000 m (9,800 ft) in summer at a few sites.[14] In China, Asian elephants survive only in the prefectures of Xishuangbanna, Simao, and Lincang of southern Yunnan. In Bangladesh, only isolated populations survive in the Chittagong Hills.[6]

A herd of elephants in the Nagarahole National Park
A herd of elephants in the grasslands of Jim Corbett National Park

Distribution and habitat

Asian elephants are highly intelligent and self-aware.[12] They have a very large and highly convoluted neocortex, a trait also shared by humans, apes and certain dolphin species. Asian elephants have the greatest volume of cerebral cortex available for cognitive processing of all existing land animals. Elephants have a volume of cerebral cortex available for cognitive processing that exceeds that of any primate species, and extensive studies place elephants in the category of great apes in terms of cognitive abilities for tool use and tool making.[13] They exhibit a wide variety of behaviors, including those associated with grief, learning, allomothering, mimicry, play, altruism, use of tools, compassion, cooperation, self-awareness, memory, and language. Elephants are reported to go to safer ground during natural disasters like tsunamis and earthquakes, although there have been no scientific records of this since it is hard to recreate or predict natural disasters.


Skin color is usually gray, and may be masked by soil because of dusting and wallowing. Their wrinkled skin is movable and contains many nerve centers. It is smoother than of African elephants, and may be depigmented on the trunk, ears, or neck. The epidermis and dermis of the body average 18 mm (0.71 in) thick; skin on the dorsum is 30 mm (1.2 in) thick providing protection against bites, bumps, and adverse weather. Its folds increase surface area for heat dissipation. They can tolerate cold better than excessive heat. Skin temperature varies from 24 to 32.9 °C (75.2 to 91.2 °F). Body temperature averages 35.9 °C (96.6 °F).[4]

Tusker at Corbett National Park taking a mud bath
Depigmented skin on the forehead and ears of an Asian elephant


[7] lb (47.4 kg). This was from an elephant killed by Sir Brooke and measured 8 ft (2.4 m) in length, and nearly 17 in (43 cm) in circumference, and weighed 90 lb (41 kg). The tusk's weight was, however, exceeded by the weight of a shorter tusk of about 6 ft (1.8 m) in length which weighed 100 lb (45 kg).21 104 A record tusk described by

Female Asian elephants usually lack tusks; if tusks—in that case called "tushes"—are present, they are barely visible, and only seen when the mouth is open. The enamel plates of the molars are greater in number and closer together in Asian elephants. Some males may also lack tusks; these individuals are called "filsy makhnas", and are especially common among the Sri Lankan elephant population. Furthermore, the forehead has two hemispherical bulges, unlike the flat front of the African elephant. Unlike African elephants which rarely use their forefeet for anything other than digging or scraping soil, Asian elephants are more agile at using their feet in conjunction with the trunk for manipulating objects. They can sometimes be known for their violent behavior.[11]

Tusks serve to dig for water, salt, and rocks, to debark trees, as levers for maneuvering fallen trees and branches, for work, for display, for marking trees, as weapon for offense and defense, as trunk-rests, as protection for the trunk. They are known to be right or left tusked.[4]

Tusker debarking a tree


The trunk can hold about four litres of water. Elephants will playfully wrestle with each other using their trunks, but generally use their trunks only for gesturing when fighting.[10]

The "proboscis" or trunk consists wholly of muscular and membranous tissue, and is a tapering muscular structure of nearly circular cross-section extending proximally from attachment at the anterior nasal orifice, and ending distally in a tip or finger. The length may vary from 1.5 to 2 m (59 to 79 in) or longer depending on the species and age. Four basic muscle masses—the radial, the longitudinal and two oblique layers—and the size and attachments points of the tendon masses allow the shortening, extension, bending, and twisting movements accounting for the ability to hold, and manipulate loads of up to 300 kg (660 lb). Muscular and tendinous ability combined with nervous control allows extraordinary strength and agility movements of the trunk, such as sucking and spraying of water or dust and directed air flow blowing.[9]


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