Wild water buffalo

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Wild water buffalo
Temporal range: Middle Pleistocene-Present [1]
Indian Water Buffalo Bubalus arnee by Dr Raju Kasambe IMG 0347 (11) (cropped).jpg
in Kaziranga National Park
CITES Appendix III (CITES) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Subfamily: Bovinae
Genus: Bubalus
Species:
B. arnee
Binomial name
Bubalus arnee
(Kerr, 1792)
Subspecies
  • B. a. arnee
  • B. a. fulvus
  • B. a. septentrionalis
  • B. a. migona
Asiatic water buffalo 2015.png
Wild water buffalo range
Synonyms

Bubalus bubalis arnee

The wild water buffalo (Bubalus arnee), also called Asian buffalo, Asiatic buffalo and wild buffalo, is a large bovine native to the Indian subcontinent and Southeast Asia. It has been listed as Endangered in the IUCN Red List since 1986, as the remaining population totals less than 4,000. A population decline of at least 50% over the last three generations (24–30 years)[ when? ] is projected to continue. [2] The global population has been estimated at 3,400 individuals, of which 3,100 (91%) live in India, mostly in Assam. [3] The wild water buffalo is the most likely ancestor of the domestic water buffalo. [4] [5]

Taxonomy

Water buffalo sculpture, Lopburi, Thailand, 2300 BCE WaterBuffaloLopburiThailand2300BCE.jpg
Water buffalo sculpture, Lopburi, Thailand, 2300 BCE

Bos arnee was the scientific name proposed by Robert Kerr in 1792 who described a skull with horns of a buffalo zoological specimen from Bengal in northern India. [6] The specific name arnee is derived from Hindi arnī, which referred to a female wild water buffalo; the term is related to Sanskrit áraṇya ("forest") and áraṇa ("strange, foreign.") [7] [8] Bubalus arnee was proposed by Charles Hamilton Smith in 1827 who introduced the generic name Bubalus for bovids with large heads, convex-shaped narrow foreheads, laterally bent flat horns, funnel-shaped ears, small dewlaps and slender tails. [9] Later authors subordinated the wild water buffalo under either Bos , Bubalus or Buffelus. [10]

In 2003, the International Commission on Zoological Nomenclature placed Bubalus arnee on the Official List of Specific Names in Zoology, recognizing the validity of this name for a wild species. [11] Most authors have adopted the binomen Bubalus arnee for the wild water buffalo as valid for the taxon. [12]

Only a few DNA sequences are available from wild water buffalo populations. [13] Wild populations are considered to be the progenitor of the modern domestic water buffalo, but the genetic variation within the species is unclear, and also how it is related to the domesticated river and Carabao swamp buffaloes. [14]

Characteristics

Skull of a wild water buffalo in the Bavarian State Collection of Zoology Bubalus arnee schaedel.JPG
Skull of a wild water buffalo in the Bavarian State Collection of Zoology

The wild water buffalo has an ash-gray to black skin. The moderately long, coarse and sparse hair is directed forward from the haunches to the long and narrow head. There is a tuft on the forehead, and the ears are comparatively small. Its head-to-body-length is 240 to 300 cm (94 to 118 in) with a 60 to 100 cm (24 to 39 in) long tail and a shoulder height of 150 to 190 cm (59 to 75 in). Both sexes carry horns that are heavy at the base and widely spreading up to 2 m (79 in) along the outer edges, exceeding in size the horns of any other living bovid. The tip of the tail is bushy; the hooves are large and splayed. [15] It is larger and heavier than the domestic water buffalo, and weighs from 600 to 1,200 kg (1,300 to 2,600 lb). [16] [17] The average weight of three captive wild water buffaloes was 900 kg (2,000 lb). [18] It is among the heaviest living wild bovid species, and is slightly smaller than gaur. [19]

Distribution and habitat

A herd of wild water buffaloes in Kaziranga National Park, Assam Asiatic buffalo.jpg
A herd of wild water buffaloes in Kaziranga National Park, Assam

The wild water buffalo occurs in India, Nepal, Bhutan, Thailand, and Cambodia, with an unconfirmed population in Myanmar. It has been extirpated in Bangladesh, Laos, Vietnam, and Sri Lanka. [2] [3] It is associated with wet grasslands, swamps, flood plains and densely vegetated river valleys. [2]

In India, it is largely restricted to in and around Kaziranga, Manas and Dibru-Saikhowa National Parks, Laokhowa Wildlife Sanctuary and Bura Chapori Wildlife Sanctuary and in a few scattered pockets in Assam; and in and around D'Ering Memorial Wildlife Sanctuary in Arunachal Pradesh. A small population survives in Balphakram National Park in Meghalaya, and in Chhattisgarh in Indravati National Park and Udanti Wildlife Sanctuary. [3] This population might extend into adjacent parts of Odisha and Gadchiroli District of Maharashtra. In the early 1990s, there may still have been about 3,300–3,500 wild water buffaloes in Assam and the adjacent states of northeast India. [20] In 1997, the number was assessed at less than 1,500 mature individuals. [2]

Many surviving populations are thought to have interbred with feral or domestic water buffaloes. In the late 1980s, fewer than 100 wild water buffaloes were left in Madhya Pradesh. [21] By 1992, only 50 animals were estimated to have survived there. [20]

Nepal's only population lives in Koshi Tappu Wildlife Reserve and has grown from 63 individuals in 1976 to 219 individuals in 2009. [22] In 2016, 18 individuals were translocated from Koshi Tappu Wildlife Reserve to Chitwan National Park. [23]

In and around Bhutan's Royal Manas National Park, a small number of wild water buffaloes occur. This is part of the sub-population that occurs in India's Manas National Park. [3] In Myanmar, a few animals live in Hukaung Valley Wildlife Sanctuary. [2]

In Thailand, wild water buffaloes have been reported to occur in small herds of less than 40 individuals. A population of 25–60 individuals inhabited lowland areas of the Huai Kha Khaeng Wildlife Sanctuary between December 1999 and April 2001. This population has not grown significantly in 15 years, and is maybe interbreeding with domestic water buffaloes. [24]

The population in Cambodia is confined to a small area of easternmost Mondulkiri and possibly Ratanakiri Provinces. Only a few dozen individuals remain. [25]

The wild water buffaloes in Sri Lanka are thought to be descendants of the introduced domestic water buffalo. It is unlikely that any true wild water buffaloes remain there today. [2]

Wild-living populations found elsewhere in Asia, Australia, Argentina and Bolivia are feral domestic water buffaloes. [15]

Ecology and behavior

Wild water buffaloes are both diurnal and nocturnal. Adult females and their young form stable clans of as many as 30 individuals which have home ranges of 170 to 1,000 ha (0.66 to 3.86 sq mi), including areas for resting, grazing, wallowing, and drinking. Clans are led by old cows, even when bulls accompany the group. Several clans form a herd of 30 to 500 animals that gather at resting areas. Adult males form bachelor groups of up to 10 individuals, with older males often being solitary, and spend the dry season apart from the female clans. They are seasonal breeders in most of their range, typically in October and November. However, some populations breed year round. Dominant males mate with the females of a clan who subsequently drive them off. Their gestation period is 10 to 11 months, with an inter-birth interval of one year. They typically give birth to a single offspring, although twins are possible. Age at sexual maturity is 18 months for males, and three years for females. The maximum known lifespan is 25 years in the wild. [15] In the wild in Assam, the herd size varies from three to 30 individuals. [3]

They are probably grazers by preference, feeding mainly on graminoids when available, such as Bermuda grass, and Cyperus sedges, but they also eat other herbs, fruits, and bark, as well as browsing on trees and shrubs. [26] They also feed on crops, including rice, sugarcane, and jute, sometimes causing considerable damage. [27]

Tigers and mugger crocodiles prey on adult wild water buffaloes, and Asian black bears have also been known to kill them. [28]

Threats

A population reduction by at least 50% over the last three generations seems likely given the severity of the threats, especially hybridization; this population trend is projected to continue into the future. The most important threats are: [2]

Conservation

Bubalus arnee is included in CITES Appendix III, and is legally protected in Bhutan, India, Nepal, and Thailand. [2]

In 2017, 15 wild water buffaloes were reintroduced into Chitwan National Park in Nepal to establish a second viable sub-population in the country. [29]

Related Research Articles

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The clouded leopard, also called mainland clouded leopard, is a wild cat inhabiting dense forests from the foothills of the Himalayas through Northeast India and Bhutan to mainland Southeast Asia into South China. It was first described in 1821 on the basis of a skin of an individual from China. The clouded leopard has large dusky-grey blotches and irregular spots and stripes reminiscent of clouds. Its head-and-body length ranges from 68.6 to 108 cm with a 61 to 91 cm long tail. It uses its tail for balancing when moving in trees and is able to climb down vertical tree trunks head first. It rests in trees during the day and hunts by night on the forest floor.

<span class="mw-page-title-main">Water buffalo</span> Species of large bovid

The water buffalo, also called the domestic water buffalo or Asian water buffalo, is a large bovid originating in the Indian subcontinent and Southeast Asia. Today, it is also found in Italy, the Balkans, Australia, North America, South America and some African countries. Two extant types of water buffalo are recognized, based on morphological and behavioural criteria: the river buffalo of the Indian subcontinent and further west to the Balkans, Egypt and Italy and the swamp buffalo, found from Assam in the west through Southeast Asia to the Yangtze valley of China in the east.

<span class="mw-page-title-main">Bovinae</span> Subfamily of mammals

Bovines comprise a diverse group of 10 genera of medium to large-sized ungulates, including cattle, bison, African buffalo, water buffalos, and the four-horned and spiral-horned antelopes. The evolutionary relationship between the members of the group is still debated, and their classification into loose tribes rather than formal subgroups reflects this uncertainty. General characteristics include cloven hooves and usually at least one of the sexes of a species having true horns. The largest extant bovine is the gaur.

<i>Bubalus</i> Genus of bovines

Bubalus is a genus of Asiatic bovines that was proposed by Charles Hamilton Smith in 1827. Bubalus and Syncerus form the subtribe Bubalina, the true buffaloes.

<span class="mw-page-title-main">Gaur</span> Largest species of the bovid family

The gaur, also known as the Indian bison, is a bovine native to South Asia and Southeast Asia, and has been listed as Vulnerable on the IUCN Red List since 1986. The global population was estimated at a maximum of 21,000 mature individuals in 2016, with the majority of those existing in India.

<span class="mw-page-title-main">Bengal tiger</span> Tiger population on the Indian subcontinent

The Bengal tiger is a population of the Panthera tigris tigris subspecies and the nominate tiger subspecies. It ranks among the biggest wild cats alive today. It is considered to belong to the world's charismatic megafauna.

<span class="mw-page-title-main">Tamaraw</span> Species of buffalo

The tamaraw or Mindoro dwarf buffalo is a small buffalo belonging to the family Bovidae. It is endemic to the island of Mindoro in the Philippines, and is the only endemic Philippine bovine. It is believed, however, to have once also thrived on the larger island of Luzon. The tamaraw was originally found all over Mindoro, from sea level up to the mountains, but because of human habitation, hunting, and logging, it is now restricted to only a few remote grassy plains and is now a critically endangered species.

<span class="mw-page-title-main">Asian golden cat</span> Small wild cat

The Asian golden cat is a medium-sized wild cat native to the northeastern Indian subcontinent, Southeast Asia and China. It has been listed as Near Threatened on the IUCN Red List since 2008, and is threatened by poaching and habitat destruction, since Southeast Asian forests are undergoing the world's fastest regional deforestation.

<span class="mw-page-title-main">Fishing cat</span> Small wild cat

The fishing cat is a medium-sized wild cat of South and Southeast Asia. It has a deep yellowish-grey fur with black lines and spots. Adults have a head-to-body length of 57 to 78 cm, with a 20 to 30 cm long tail. Males are larger than females weighing 8 to 17 kg ; females average 5 to 9 kg. Since 2016, it is listed as Vulnerable on the IUCN Red List. Fishing cat populations are threatened by destruction of wetlands and have declined severely over the last decade. The fishing cat lives foremost in the vicinity of wetlands, along rivers, streams, oxbow lakes, in swamps, and mangroves.

<span class="mw-page-title-main">Four-horned antelope</span> Small antelope from Asia (Tetracerus quadricornis)

The four-horned antelope, or chousingha, is a small antelope found in India and Nepal. Its four horns distinguish it from most other bovids, which have two horns. The sole member of the genus Tetracerus, the species was first described by French zoologist Henri Marie Ducrotay de Blainville in 1816. Three subspecies are recognised. The four-horned antelope stands nearly 55–64 centimetres (22–25 in) at the shoulder and weighs nearly 17–22 kilograms (37–49 lb). Slender with thin legs and a short tail, the four-horned antelope has a yellowish brown to reddish coat. One pair of horns is located between the ears, and the other on the forehead. The posterior horns are always longer than the anterior horns, which might be mere fur-covered studs. While the posterior horns measure 8–12 centimetres (3.1–4.7 in), the anterior ones are 2–5 centimetres (0.79–1.97 in) long.

<span class="mw-page-title-main">Nilgai</span> Largest living Asian antelope

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<span class="mw-page-title-main">Koshi Tappu Wildlife Reserve</span> Wildlife Reserve of Nepal

The Koshi Tappu Wildlife Reserve is a protected area in the Terai of eastern Nepal covering 176 km2 (68 sq mi) of wetlands in the Sunsari, Saptari and Udayapur Districts. It comprises extensive reed beds and freshwater marshes in the floodplain of the Kosi River, and ranges in elevation from 75 to 81 m. It was established in 1976 and designated as a Ramsar site in December 1987. It hosts Nepal's last remaining herd of the wild water buffalo.

<span class="mw-page-title-main">Bovid hybrid</span> Crossbreeds in the bovid family

A bovid hybrid is the hybrid offspring of members of two different species of the bovid family. There are 143 extant species of bovid, and the widespread domestication of several species has led to an interest in hybridisation for the purpose of encouraging traits useful to humans, and to preserve declining populations. Bovid hybrids may occur naturally through undirected interbreeding, traditional pastoral practices, or may be the result of modern interventions, sometimes bringing together species from different parts of the world.

<span class="mw-page-title-main">Terai–Duar savanna and grasslands</span>

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<span class="mw-page-title-main">Huai Kha Khaeng Wildlife Sanctuary</span> Protected area in Thailand

The Huai Kha Khaeng Wildlife Sanctuary is in Uthai Thani and Tak Provinces, Thailand. The park was established in 1974, and is part of the largest intact seasonal tropical forest complex in Mainland Southeast Asia. It, coupled with the Thungyai Naresuan Wildlife Sanctuary was declared a World Heritage Site by the United Nations in 1991. Together, the two sanctuaries occupy 622,200 hectares. As of 2014 it still contained viable populations of large mammals, including gibbons, bears, elephants and Indochinese tigers, although like all other sites in mainland Southeast Asia, some species have disappeared or have experienced severe declines.

The water buffalo is a domesticated bovid widely kept in Asia, Europe and South America.

<span class="mw-page-title-main">Buffalo meat</span> Meat of the water buffalo

Buffalo meat, also known as buffalo beef, is the meat of the water buffalo, a large bovid, raised for its milk and meat in many countries including India, Nepal, Pakistan, Bangladesh, Philippines, Bulgaria, Italy, Russia, Czech Republic, Slovakia, Australia and Egypt.

<span class="mw-page-title-main">Bubalina</span> Subtribe of bovines consisting of the true buffalo

Bubalina is a subtribe of wild cattle that includes the various species of true buffalo. Species include the African buffalo, the anoas, and the wild water buffalo. Buffaloes can be found naturally in sub-Saharan Africa, South Asia and Southeast Asia, and domestic and feral populations have been introduced to Europe, the Americas, and Australia. In addition to the living species, bubalinans have an extensive fossil record where remains have been found in much of Afro-Eurasia.

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Notes