Yak
Yak in Nepal, Annapurna Circuit
Conservation status
Vulnerable (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Family:	Bovidae
Genus:	Bos
Species:	B. grunniens
Binomial name
Bos grunniens Linnaeus, 1766
Synonyms
Poephagus grunniens Bos mutus Przewalski, 1883

The yak, Bos grunniens or Bos mutus, is a long-haired bovine found throughout the Himalayan region of south Central Asia, the Tibetan Plateau and as far north as Mongolia and Russia. In addition to a large domestic population, there is a small, vulnerable wild yak population. In the 1990s, a concerted effort was undertaken to help save the wild yak population.

Etymology[link]

The English word "yak" derives from the Tibetan (Tibetan: གཡག་, Wylie: g.yag), or gyag – in Tibetan this refers only to the male of the species, the female being called a dri or nak. In English, as in most other languages which have borrowed the word, "yak" is usually used for both sexes.

Taxonomy[link]

Yaks belong to the genus Bos, and are therefore related to cattle (Bos primigenius taurus, Bos primigenius indicus). Mitochondrial DNA analyses to determine the evolutionary history of yaks have been somewhat ambiguous.

The yak may have diverged from cattle at any point between one and five million years ago, and there is some suggestion that it may be more closely related to bison than to the other members of its designated genus.^[2] Apparent close fossil relatives of the yak, such as Bos baikalensis, have been found in eastern Russia, suggesting a possible route by which yak-like ancestors of the modern American bison could have entered the Americas.^[3]

The species was originally designated as Bos grunniens ("grunting ox") by Linnaeus in 1766, but this name is now generally only considered to refer to the domesticated form of the animal, with Bos mutus ("mute ox") being the preferred name for the wild species. Although some authors still consider the wild yak to be a subspecies, Bos grunniens mutus, the ICZN made an official ruling in 2003^[4] permitting the use of the name Bos mutus for wild yaks, and this is now the more common usage. ^[1][3][5]

Except where the wild yak is considered as a subspecies of Bos grunniens, there are no recognised subspecies of yak.

Physical characteristics[link]

Woman and yak at Qinghai Lake

Wild yaks are among the largest bovids and are second only to the gaur in shoulder height. Wild yak adults stand about 1.6 to 2.2 m (5.2 to 7.2 ft) tall at the shoulder and weigh 325–1,000 kg (720–2,200 lb). The head and body length is 2.5 to 3.4 m (8.2 to 11 ft), not counting the tail of 70 to 100 cm (28 to 39 in). The females are about one-third the weight and are about 30% smaller in their linear dimensions when compared to bull wild yaks.^[6][7][8] Domesticated yaks are much smaller, males weighing 350 to 580 kg (770 to 1,300 lb) and females 225 to 255 kg (500 to 560 lb).^[9]

Yaks are heavily built animals with a sturdy frame, short legs, and rounded cloven hooves. They have small ears and a wide forehead, with smooth horns that are generally dark in colour. In males, the horns sweep out from the sides of the head, and then curve forward; they typically range from 48 to 99 centimetres (19 to 39 in) in length. The horns of females are smaller, only 27 to 64 centimetres (11 to 25 in) in length, and have a more upright shape. Both sexes have a short neck with a pronounced hump over the shoulders, although this is larger and more visible in males.^[3] Yaks are highly friendly in nature and can easily be trained. There has been very little documented aggression from yaks towards human beings, although mothers can be extremely protective of their young and will bluff charge if they feel threatened.^{[citation needed]}

Both sexes have long shaggy hair with a dense woolly undercoat over the chest, flanks, and thighs to insulate them from the cold. Especially in males, this may form a long "skirt" that can reach the ground. The tail is long and horselike rather than tufted like the tails of cattle or bison. Wild yaks typically have black or dark brown hair over most of the body, with a greyish muzzle, although some wild golden-brown individuals have been reported. Domesticated yaks have a wider range of coat colours, with some individuals being white, grey, brown, roan or piebald. The udder in females and the scrotum in males are small and hairy, as protection against the cold. Females have four teats.^[3]

To the casual observer, yaks are easily confused with Highland cattle^{[citation needed]}, but upon closer examination, the physical differences are quite apparent. However, Highland cattle are shaggy, rather than long-haired, and have straight backs and tufted tails.

Physiology[link]

Yak physiology is well adapted to high altitudes, having larger lungs and heart than cattle found at lower altitudes, as well as greater capacity for transporting oxygen through their blood^[10] due to the persistence of foetal haemoglobin throughout life.^[11] Conversely, yaks do not thrive at lower altitudes,^[12] and begin to suffer from heat exhaustion above about 15 °C (59 °F). Further adaptations to the cold include a thick layer of subcutaneous fat, and an almost complete lack of functional sweat glands.^[10]

Compared with domestic cattle, the rumen of yaks is unusually large, relative to the omasum. This likely allows them to consume greater quantities of low-quality food at a time, and to ferment it longer so as to extract more nutrients.^[10] Yak consume the equivalent of 1% of their body weight daily while cattle require 3% to maintain condition.^{[citation needed]}

Odor[link]

Contrary to popular belief, yak and their manure have little to no detectable odor^[13] when maintained appropriately in pastures or paddocks with adequate access to forage and water. Yak wool is naturally odor resistant.^[14]

Reproduction and life history[link]

A ten-day-old yak

Yaks mate in the summer, typically between July and September, depending on the local environment. For the remainder of the year, many males wander in small bachelor groups away from the large herds, but, as the rut approaches, they become aggressive and regularly fight amongst each other to establish dominance. In addition to non-violent threat displays, bellowing, and scraping the ground with their horns, male yaks also compete more directly, repeatedly charging at each other with heads lowered or sparring with their horns. Like bison, but unlike cattle, males wallow in dry soil during the rut, often while scent-marking with urine or dung.^[3] Females enter oestrus up to four times a year, and females are receptive only for a few hours in each cycle.^[15]

Gestation lasts between 257 and 270 days,^[10] so that the young are born between May and June, and results in the birth of a single calf. The female finds a secluded spot to give birth, but the calf is able to walk within about ten minutes of birth, and the pair soon rejoin the herd.^[10] Females of both the wild and domestic forms typically give birth only once every other year,^[3] although more frequent births are possible if the food supply is good.

Calves are weaned at one year and become independent shortly thereafter. Wild calves are initially brown in colour, and only later develop the darker adult hair. Females generally give birth for the first time at three or four years of age,^[16] and reach their peak reproductive fitness at around six years. Yaks may live for more than twenty years in domestication or captivity,^[3] although it is likely that this may be somewhat shorter in the wild.

Wild yaks[link]

Yak at a zoo in Syracuse, New York

A herd of yaks wandering in The Himalayas

Wild yaks (Bos grunniens mutus or Bos mutus, Tibetan: འབྲོང་, Wylie: 'brong) usually form herds of between ten and thirty animals. They are insulated by dense, close, matted under-hair as well as their shaggy outer hair.^[17] Yaks secrete a special sticky substance in their sweat which helps keep their under-hair matted and acts as extra insulation.^{[citation needed]} This secretion is used in traditional Nepalese medicine.^{[citation needed]} Many wild yaks are killed for food by hunters in China; they are now a vulnerable species.^[18]

The diet of wild yaks consists largely of grasses and sedges, such as Carex, Stipa, and Kobresia. They also eat a smaller amount of herbs, winterfat shrubs, and mosses, and have even been reported to eat lichen. Historically, the main natural predator of the wild yak has been the Tibetan wolf, but brown bears and snow leopards have also been reported as predators in some areas, likely of young or infirm wild yaks.^[3]

Thubten Jigme Norbu, the elder brother of Tenzin Gyatso, the 14th Dalai Lama, reported on his journey from Kumbum in Amdo to Lhasa in 1950:

Before long I was to see the vast herds of drongs with my own eyes. The sight of those beautiful and powerful beasts who from time immemorial have made their home on Tibet's high and barren plateaux never ceased to fascinate me. Somehow these shy creatures manage to sustain themselves on the stunted grass roots which is all that nature provides in those parts. And what a wonderful sight it is to see a great herd of them plunging head down in a wild gallop across the steppes. The earth shakes under their heels and a vast cloud of dust marks their passage. At nights they will protect themselves from the cold by huddling up together, with the calves in the centre. They will stand like this in a snow-storm, pressed so close together that the condensation from their breath rises into the air like a column of steam. The nomads have occasionally tried to bring up young drongs as domestic animals, but they have never entirely succeeded. Somehow once they live together with human beings they seem to lose their astonishing strength and powers of endurance; and they are no use at all as pack animals, because their backs immediately get sore. Their immemorial relationship with humans has therefore remained that of game and hunter, for their flesh is very tasty.

—Thubten Norbu, Tibet is My Country^[19]

Distribution and habitat[link]

Wild yaks are found primarily in northern Tibet and western Qinghai, with some populations extending into the southernmost parts of Xinjiang, and into Ladakh in India. Small, isolated populations of wild yak are also found farther afield, primarily in western Tibet and eastern Qinghai. In historic times, wild yaks were also found in Nepal and Bhutan, but they are now considered extinct in both countries, except as domesticated animals.^[1]

The primary habitat of wild yaks consists of treeless uplands between 3,000 and 5,500 m (9,800 and 18,000 ft), dominated by mountains and plateaus. They are most commonly found in alpine meadows with a relatively thick carpet of grasses and sedges, rather than the more barren steppe country.^[20]

Behaviour[link]

Yaks are herd animals. Herds can contain several hundred individuals, although many are much smaller. The herds consist primarily of females and their young, with a smaller number of adult males. The remaining males are either solitary, or found in much smaller groups, averaging around six individuals. Although they can become aggressive when defending young, or during the rut, wild yaks generally avoid humans, and may rapidly flee for great distances if any approach.^[3]

Domesticated yaks[link]

A Yak rider near Tsomgo Lake, east Himalayas (3700 m)

Nepali domestic transport goods on a trek to Mount Everest

Domesticated yaks have been kept for thousands of years, primarily for their milk, fibre and meat, and as beasts of burden. Their dried dung is an important fuel, used all over Tibet, and is often the only fuel available on the high treeless Tibetan plateau. Yaks transport goods across mountain passes for local farmers and traders as well as for climbing and trekking expeditions. "Only one thing makes it hard to use yaks for long journeys in barren regions. They will not eat grain, which could be carried on the journey. They will starve unless they can be brought to a place where there is grass."^[21] They also are used to draw ploughs. Yak milk is often processed to a cheese called chhurpi in Tibetan and Nepali languages, and byaslag in Mongolia. Butter made of Yaks' milk is an ingredient of the butter tea that Tibetans consume in large quantities,^[22] and is also used in lamps and made into butter sculptures used in religious festivities.^[23] Yaks grunt, and unlike cattle are not known to produce the characteristic bovine lowing sound.

Yak sports[link]

Yak Racing in Shimshal Pass, Pakistan

In parts of Tibet and Karakorum yak racing is a form of entertainment at traditional festivals and is considered an important part of their culture. More recently, sports involving domesticated yaks, such as yak skiing, or yak polo, are being marketed as tourist attractions in Central Asian countries, including Gilgit–Baltistan, Pakistan.

Hybrid yak[link]

In Nepal, Tibet and Mongolia, domestic cattle are crossbred with yaks. This gives rise to the infertile male dzo as well as fertile females known as dzomo or zhom, which may be crossed again with cattle. The "Dwarf Lulu" breed, "the only Bos primigenius taurus type of cattle in Nepal" has been tested for DNA markers and found to be a mixture of both taurine and zebu types of cattle (B. p. taurus and B. p. indicus) with yak.^[24] According to the International Veterinary Information Service, the low productivity of second generation cattle-yak crosses makes them suitable only as meat animals.^[25]

Crosses between yaks and domestic cattle (Bos primigenius taurus) have been recorded in Chinese literature for at least 2,000 years.^[3] Successful crosses have also been recorded between yak and American bison,^[25] gaur, and banteng, generally with similar results to those produced with domestic cattle.^[3]

Gallery[link]

• 

  Yaks in Manali, Himachal Pradesh, India saddled for riding

• 

  A train of pack yaks at Litang monastery in Ganzi Tibetan Autonomous Prefecture, Sichuan, China

• 

  Yaks plowing fields in Tibet

• 

  A domestic yak in Nepal

• 

  Cigarette advertising for the brand "Yak" in Bhaktapur, Nepal

References[link]

External links[link]

Wikimedia Commons has media related to: Yak

Wikispecies has information related to: Yak

• ARKive – images and movies of the wild yak (Bos grunniens)
• h2g2 Yaks Edited Guide Entry
• International Yak Association (IYAK)
• European Yak Association (EYAK)
• Article on Yak breeds in FAO archives
• Yaks: The Official Animal of Tibet
• AnimalInfo.Org: Animal Info – Wild Yak

v t e Fibers Natural Animal Alpaca Angora Byssus Camel hair Cashmere Catgut Chiengora Guanaco Llama Mohair Pashmina Qiviut Rabbit Silk Sinew Spider silk Wool Vicuña Yak Vegetable Abacá Bagasse Bamboo Coir Cotton Flax Linen Hemp Jute Kapok Kenaf Piña Raffia Ramie Sisal Wood Mineral Asbestos Synthetic Cellulose Acetate Triacetate Art silk Bamboo Lyocell Rayon Modal Rayon Rayon Mineral Glass Carbon Tenax Basalt Metallic Polymer Acrylic Aramid Twaron Kevlar Technora Nomex Microfiber Modacrylic Nylon Olefin Polyester Polyethylene Dyneema Spectra Spandex Vinylon Vinyon Zylon

This biographical article needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful. (June 2011)

The topic of this article may not meet Wikipedia's notability guideline for biographies. Please help to establish notability by adding reliable, secondary sources about the topic. If notability cannot be established, the article is likely to be merged, redirected, or deleted. (June 2011)

Les Twins
Background information
Born	(1988-12-06) December 6, 1988 (age 23)
Origin	Sarcelles, Val d'Oise, France
Genres	New Style, Hip-hop dance
Associated acts	Cirque Du Soleil, Criminalz Crew, Veteranz Crew
Website	https://www.facebook.com/pages/Les-TWINS-Organization-Official/109855652372782?sk=info
Members
Laurent Nicolas Bourgeois Larry Nicolas Bourgeois

Larry and Laurent Bourgeois, popularly known as "Les Twins" or Larry " Ca Blaze " Bourgeois and Laurent " Lil Beast " Bourgeois, are a hip hop dance duo originating from Sarcelles, France. The twin brothers who are of Guadeloupean descent (Guadeloupe, F.W.I.), are known worldwide for their talents in New Style dancing. Although they can be seen dancing as a duet, they are also a part of a larger crew known as Criminalz Crew, a group with a variety of dancers that range from b-boys to other new style dancers such as themselves. Les Twins have appeared on the television show Incroyable Talent^[1] as well as the Ellen DeGeneres Show. Les Twins have competed in multiple dance competitions such as: World Of Dance, Battle Of The Stylez, Urban Dance Showcase and won the Juste Debout Dance Competition in the Hip-Hop New Style category in 2011. ^{[2][original research?]} They come from a very large family with 18 siblings, and only 9 of whom dance.

Les Twins have performed with Beyoncé Knowles^[3].^[4] They have also appeared in Jay-Z's That's Rocawear viral video^[5] and the music video for "La Gloria" by French-Argentine band Gotan Project. They were also traveling with Cirque du Soleil Michael Jackson Immortal World Tour as dancers with a newly formed crew especially for the tour, named Veteranz crew until sometime in 2012.

Les Twins are represented by Next Model Management.

Gallery[link]

• 

  Les Twins photo shoot with Shawn Welling

• 

  Les Twins in action

• 

  Les Twins mid-air during a shoot with Shawn Welling

References[link]

External links[link]

• Les Twins Official Contacts: https://www.facebook.com/pages/Les-TWINS-Organization-Official/109855652372782?sk=info

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (August 2010)

Ace Ventura is a fictional character, created by screenwriters Jack Bernstein, Tom Shadyac and Steve Oedekerk. Ace was played by Jim Carrey in the films (Ace Ventura: Pet Detective, released in 1994, and Ace Ventura: When Nature Calls, released in 1995.) He was voiced by Michael Daingerfield (credited as Michael Hall) in the animated television series.

Biography[link]

Ace is a Miami-based private detective specializing in the retrieval of missing animals, said to be the son of Ron Ventura and descendant of such as "Ernest Ventura Shackleton" and "Jacques Ventura Costeau". It is not known whether the animated television series was contiguous with the feature-films; but if it was it may take place before them because the only one of his pets to appear in the series is his capuchin monkey, Spike. During the second film, Ace attempts monasticism after a failed rescue attempt of a raccoon; only to be called out of retirement to investigate a missing sacred animal. By the events portrayed in Ace Ventura, Jr. it is established that Ace has disappeared somewhere in the Bermuda Triangle, and never appears in the film itself.^[1]

Development[link]

This section requires expansion.

Bernstein had wanted to do a comedic version of Sherlock Holmes, and when watching the Stupid Pet Tricks segment on Late Night With David Letterman, got the idea for a pet detective.^{[citation needed]}

Personality[link]

Ace Ventura is an eccentric self-styled 'pet detective' who forsook regular police work to concentrate on this latter pursuit. Like other fictional detectives, he is notable for extraordinary powers of observation and deduction; and on at least one occasion, he has managed to escape being shot by catching a bullet in his teeth.

Ventura's eccentricities include his persistent vulgarity and exceedingly flamboyant behaviour; but he is nevertheless a dedicated detective, driven by an insatiable adoration of animals and a desire to protect them from human mistreatment. In Ace Ventura Jr: Pet Detective, it is implied that his abilities, personality, and appearance are hereditary. Although Ace is an animal lover, the second film reveals a deep-seated chiroptophobia.

In most appearances, Ace usually wears an unbuttoned Aloha shirt over a plain white A-shirt, with red and black striped trousers and black combat boots. He lives in an apartment alongside many different animals, all of whom hide from his landlord, Mr. Schickadance, in his absence.

[edit] Appearance in The Mask: The Animated Series

In the episodes "The Aceman Cometh/Have Mask, Will Travel" of The Mask: The animated series, when Milo, the pet dog of Stanley Ipkiss, was stolen by Dr. Pretorius, Ipkiss calls Ace for help. Both Ipkiss/the Mask and Ace Ventura were the animated versions of characters portrayed by Jim Carrey himself. Ace later accidentally wears the mask on his rump, which assumes a face similar to his own and gains the ability to speak, suggesting a joke featured in the original film of speaking while presenting his rump to the listener and moving it in semblance of a speaking mouth.

Reception[link]

Ace was ranked the 60th Greatest Movie Character in a November, 2008 list by Empire Magazine.^[2] Cyborg Franky from Japanese anime and manga One Piece is based on the character.^{[citation needed]}

See also[link]

• Ace Ventura: Pet Detective
• Ace Ventura: When Nature Calls

External links[link]

• Ace Ventura: Pet Detective at the Internet Movie Database
• Ace Ventura: When Nature Calls at the Internet Movie Database
• Ace Ventura Jr: Pet Detective at the Internet Movie Database

References[link]