Brookes, 1828 (= Felis jubata, Schreber, 1775) by monotypy
The range of the cheetah
Cheetah (Acinonyx jubatus) is the common name for a long-legged, fast-running New World wild cat (family Felidae), characterized by a slender body with narrow waist, relatively small head, deep and narrow chest, nonretractile claws, tawny fur with black spots, and a long tail. The cheetah is unique in its speed, being the fast land animal, and in being a wild cat that lacks climbing abilities. As such, it is placed in its own genus, Acinonyx.
The unique adaptations of the cheetah allows them to capture fast prey, such as the Thomson's gazelle, the springbok, and the impala, as well as hares and other small mammals, and the young of large animals, such as the wildebeest and zebra. As such, they play an important ecological role in keeping the population size of the prey species under control.
Cheetahs have long played an important role in human society. They have been kept as pets, and trained for hunting, since the time of the Ancient Egyptians and their fur was once considered a status symbol. Their speed, agility, and beauty make them a favorite of ecotours and in zoos.
Cheetahs remain at risk with only around 12,400 remaining wild in Africa and around 50 in Iran.
- 1 Overview and description
- 2 Distribution and habitat
- 3 Diet and hunting
- 4 Reproduction and social life
- 5 Classification and genetics
- 6 Economic importance
- 7 Conservation status
- 8 Notes
- 9 References
- 10 Credits
Overview and description
Cheetahs belong to the Felinae subfamily within the Felidae family, along with the domestic cat, lynx, ocelot, jaguarundi, and cougar, among others. The members of Felinae are known as "small cats" in contrast to the "big cats" (such as lion, tiger, jaguar, leopard, and snow leopard) of the subfamily Pantherinae, although some of the "small cats" can weight more than some of the "big cats."
The adult cheetah weighs from 40 kilograms (88 lb) to 65 kilograms (140 lb). Its total body length is from 115 centimeters (45 in) to 135 centimeters (53 in), while the tail can measure up to 84 centimeters (33 in) in length. Males tend to be slightly larger than females and have slightly bigger heads, but there is not a great variation in cheetah sizes and it is difficult to tell males and females apart by appearance alone. Compared to a similarly-sized leopard, the cheetah is generally shorter-bodied, but is longer tailed and taller (it averages about 90 centimeters (35 in) tall) and so it appears more streamlined.
The cheetah's chest is deep and its waist is narrow. The coarse, short fur of the cheetah is tan with round black spots measuring from 2 centimeters (0.79 in) to 3 centimeters (1.2 in) across, affording it some camouflage while hunting. There are no spots on its white underside, but the tail has spots, which merge to form four to six dark rings at the end. The tail usually ends in a bushy white tuft. The cheetah has a small head with high-set eyes. Black "tear marks" run from the corner of its eyes down the sides of the nose to its mouth to keep sunlight out of its eyes and to aid in hunting and seeing long distances.
Some cheetahs also have a rare fur pattern mutation: cheetahs with larger, blotchy, merged spots are known as "king cheetahs." It was once thought to be a separate species or subspecies, but it is merely a mutation of the African cheetah. The king cheetah has only been seen in the wild a handful of times, but it has been bred in captivity.
The cheetah's paws have semi-retractable claws (O'Brien et al. 1986), a feature known only in three other cat species: the fishing cat, the flat-headed cat, and the iriomote cat. These claws offer the cat extra grip in its high-speed pursuits. The ligament structure of the cheetah's claws is the same as those of other cats; it simply lacks the sheath of skin and fur present in other varieties, and therefore the claws are always visible, with the exception of the dewclaw. The dewclaw itself is much shorter and straighter than other cats, but is sharp and is helpful in tripping prey when running.
As with all cats, the cheetah walks on four feet in a digitigrade manner—that is on their toes. Their hind legs are longer and stronger than their fore legs, which gives them strength for sprinting and leaping, but not stamina for long distance running.
The cheetah is the fastest land animal. It has been claimed to reach speeds between 102 kilometers per hour (63 mph) and 120 kilometers per hour (75 mph) in short bursts covering distances up to 460 meters (1,500 ft), and that it has the ability to accelerate from zero to 110 kilometers per hour (68 mph) in three seconds (Hildebrand 1959; Kruszelnicki 1999). According to Hunter and Hamman (2003), the cheetah's fastest recorded speed was 110 km/h (68 mph).
Adaptations that enable the cheetah to run as fast as it does include large nostrils that allow for increased oxygen intake, and an enlarged heart and lungs that work together to circulate oxygen efficiently. During a typical chase its respiratory rate increases from 60 to 150 breaths per minute (O'Brien et al. 1986). While running, in addition to having good traction due to its semi-retractable claws, the cheetah uses its long tail as a rudder-like means of steering to allow it to make sharp turns, necessary to outflank prey who often make such turns to escape.
Unlike the "big cats" of the Pantherinae subfamily, the cheetah can purr as it inhales, but cannot roar. By contrast, the big cats can roar but cannot purr, except while exhaling. However, the cheetah is still considered by some to be the smallest of the big cats and part of Pantherinae. While it is often mistaken for the leopard, the cheetah does have distinguishing features, such as the aforementioned long "tear-streak" lines that run from the corners of its eyes to its mouth. The body frame of the cheetah is also very different from that of the leopard, most notably so in its thinner and longer tail, and unlike the leopard, its spots are not arranged into rosettes.
The word "cheetah" is derived from the Sanskrit word chitrakāyaḥ, meaning "variegated body," via the Hindi चीता cītā (AHD 2006).
Distribution and habitat
The cheetah is found in the wild primarily in Africa, although in the past its range extended into much of Asia, and a small population still remains in Iran. In Africa, it is widely found in sub-Saharan African, in the southern, eastern, and central areas, and in North Africa as well. In Iran, it is found in the Dasht-e Kavir area of the Khorasan Province. Of the five subspecies of cheetah in the genus Acinonyx, four live in Africa and one in Iran. It is possible, though doubtful, that some cheetahs remain in India. There have also been several unconfirmed reports of Asiatic cheetahs in the Balochistan province of Pakistan, with at least one dead animal being recovered recently (WWFPak 2007). In much of its former range, it was tamed by aristocrats and used to hunt antelopes in much the same way as is still done with members of the greyhound group of dogs.
The cheetah thrives in areas with vast expanses of land where prey is abundant. The cheetah prefers to live in an open biotope, such as semi-desert, prairie, and thick brush, though it can be found in a variety of habitats. In Namibia, for example, it lives in grasslands, savannahs, areas of dense vegetation, and mountainous terrain.
Diet and hunting
Like other felids, cheetahs are carnivores, getting food by killing and eating other animals. The teeth of cats are well suited to their diet, with long canines for gripping prey and blade-like molars for cutting flesh (Voelker 1986).
The cheetah eats mostly mammals under 40 kilograms (88 lb), including the Thomson's gazelle, the Grant's gazelle, the springbok, and the impala. The young of larger mammals, such as wildebeests and zebras, are taken at times, and adults too, when the cats hunt in groups. Guineafowl and hares are also prey.
The diet of a cheetah is dependent upon the area in which it lives. For example, on the East African plains, its preferred prey is the Thomson's gazelle. This small antelope is shorter than the cheetah (about 58 centimeters (23 in) - 70 centimeters (28 in) tall and 70 centimeters (28 in) - 107 centimeters (42 in) long), and also cannot run faster than the cheetah (only up to 80 kilometers per hour (50 mph)), which combine to make it an appropriate prey. Cheetahs look for individuals which have strayed some distance from their group, and do not necessarily seek out old or weak ones.
While the other big cats mainly hunt by night, the cheetah is a diurnal hunter. It hunts usually either early in the morning or later in the evening when it is not so hot, but there is still enough light. The cheetah hunts by vision rather than by scent. Prey is stalked to within 10 meters (33 ft)-30 meters (98 ft), then chased. This is usually over in less than a minute, and rarely exceeding 190 meters (600 feet) (Grzimek et al. 2004), and if the cheetah fails to make a catch quickly, it will give up. The cheetah has an average hunting success rate of around 50%—half of its chases result in failure.
The cheetah kills its prey by tripping it during the chase, then biting it on the underside of the throat to suffocate it, for the cheetah is not strong enough to break the necks of the four-legged prey it mainly hunts. The bite may also puncture a vital artery in the neck. Then, the cheetah proceeds to devour its catch as quickly as possible before the kill is taken by stronger predators.
Running at speeds of 60 mph or more puts a great deal of strain on the cheetah's body. When sprinting, the cheetah's body temperature becomes so high that it would be deadly to continue—this is why the cheetah is often seen resting after it has caught its prey. If it is a hard chase, it sometimes needs to rest for half an hour or more.
Cheetahs are polygamous and breed year round, with peaks after rains (Grzimek et al. 2004). Female cheetahs reach maturity within 20 to 24 months, and males around 12 months, although they do not usually mate until at least three years old). A recent study of cheetahs in the Serengeti showed that female cheetahs often have cubs by many different males (ITN 2007).
Females give birth to up to nine cubs after a gestation period of ninety to 98 days, although the average litter size is three to five. Cubs weigh from 150 grams (5.3 oz) to 300 grams (11 oz) at birth. Unlike some other cats, the cheetah is born with its characteristic spots. Cubs are also born with a downy underlying fur on their necks, called a mantle, extending to mid-back. This gives them a mane or Mohawk-type appearance; this fur is shed as the cheetah grows older. It has been speculated that this mane gives a cheetah cub the appearance of the ratel or honey badger, a fierce member of the Mustelidae family, to scare away potential aggressors (Eaton 1976). Cubs leave their mother between 13 and 20 months after birth. Life span is up to 12 years in the wild, but up to 20 years in captivity.
Unlike males, females are solitary and tend to avoid each other, though some mother/daughter pairs have been known to be formed for small periods of time. The cheetah has a unique, well-structured social order. Females live alone except when they are raising cubs and they raise their cubs on their own. The first 18 months of a cub's life are important—cubs learn many lessons because survival depends on knowing how to hunt wild prey species and avoid other predators. At 18 months, the mother leaves the cubs, who then form a sibling, or "sib" group, that will stay together for another six months. At about two years, the female siblings leave the group, and the young males remain together for life.
Males are very sociable and will group together for life, usually with their brothers in the same litter; although if a cub is the only male in the litter then two or three lone males may group up, or a lone male may join an existing group. These groups are called coalitions. A coalition is six times more likely to obtain an animal territory than a lone male, although studies have shown that coalitions keep their territories just as long as lone males—between four and four and a half years.
Males are very territorial. Females' home ranges can be very large and trying to build a territory around several females' ranges is impossible to defend. Instead, males choose the points at which several of the females' home ranges overlap, creating a much smaller space, which can be properly defended against intruders while maximizing the chance of reproduction. Coalitions will try their most to maintain territories in order to find females with whom they will mate. The size of the territory also depends on the available resources; depending on the part of Africa, the size of a male's territory can vary greatly from 37 to 160 square kilometers.
Males mark their territory by urinating on objects that stand out, such as trees, logs, or termite mounds. The whole coalition contributes to the scent. Males will attempt to kill any intruders and fights result in serious injury or death.
Unlike males and other felines, females do not establish territories. Instead, the area they live in is termed a home range. These overlap with other females' home ranges, often those of their daughters, mothers, or female littermates. Females always hunt alone, although cubs will accompany their mothers to learn to hunt once they reach the age of five to six weeks.
The size of a home range depends entirely on the availability of prey. Cheetahs in southern African woodlands have ranges as small as 34 square kilometers, while in some parts of Namibia they can reach 1,500 square kilometers (580 sq mi).
The cheetah cannot roar, unlike other big cats, but does have the following vocalizations:
- Chirping. When cheetahs attempt to find each other, or a mother tries to locate her cubs, it uses a high-pitched barking called chirping. The chirps made by a cheetah cub sound more like a bird chirping, and so are termed chirping.
- Churring or stuttering. This vocalization is emitted by a cheetah during social meetings. A churr can be seen as a social invitation to other cheetahs, an expression of interest, uncertainty, or appeasement or during meetings with the opposite sex (although each sex churrs for different reasons).
- Growling. This vocalization is often accompanied by hissing and spitting and is exhibited by the cheetah during annoyance, or when faced with danger.
- Yowling. This is an escalated version of growling, usually displayed when danger worsens.
- Purring. This is made when the cheetah is content, usually during pleasant social meetings (mostly between cubs and their mothers).
Interspecific predatory relationships
Cheetahs are outranked by all the other large predators in most of their range. Because they are designed for extreme bursts of short speed at the expense of both power and the ability to climb trees, they cannot defend themselves against most of Africa's other predator species. They avoid fighting typically and will surrender a kill immediately to even a single hyena, rather than risk any injury, as anything that slows them down is essentially life threatening.
The cheetah's death rate is very high during the early weeks of its life; up to 90 percent of cheetah cubs are killed during this time by lions, leopards, hyenas, wild dogs, or even by eagles. Cheetah cubs often hide in thick brush for safety. Mother cheetahs will defend their young and are at times successful in driving predators away from their cubs. Coalitions of male cheetahs can also chase away other predators, depending on the coalition size and the size and number of the predator. Because of its speed, a healthy adult cheetah has no predators.
A cheetah has a 50 percent chance of losing its kills to other predators (O'Brien et al. 1986). Cheetahs avoid competition by hunting at different times of the day and by eating immediately after the kill. Due to the reduction in habitat in Africa, Cheetahs in recent years have faced greater pressure from other native African predators as available range declines.
Classification and genetics
The cheetah was formerly considered to be particularly primitive among the cats and to have evolved approximately 18 million years ago. New research, however, suggests that the last common ancestor of all 40 existing species of felines lived more recently than that—about 11 million years ago. The same research indicates that the cheetah, while highly derived morphologically, is not of particularly ancient lineage, having separated from its closest living relatives (Puma concolor, the cougar, and Puma yaguarondi, the jaguarundi) around five million years ago (Mattern and McLennan 2000; Johnson et al. 2006).
The cheetah has unusually low genetic variability and a very low sperm count, which also suffers from low motility and deformed flagellae (O'Brien et al. 1986). Skin grafts between non-related cheetahs illustrate this point in that there is no rejection of the donor skin. It is thought that it went through a prolonged period of inbreeding following a genetic bottleneck during the last ice age. It probably evolved in Africa during the Miocene epoch (26 million to 7.5 million years ago), before migrating to Asia.
Now-extinct species include Acinonyx pardinensis (Pliocene epoch), much larger than the modern cheetah and found in Europe, India, and China and Acinonyx intermedius (mid-Pleistocene period), found over the same range. The extinct genus Miracinonyx was extremely cheetah-like, but recent DNA analysis has shown that Miracinonyx inexpectatus, Miracinonyx studeri, and Miracinonyx trumani (early to late Pleistocene epoch), found in North America and called the "North American cheetah" are not true cheetahs, instead being close relatives to the cougar.
For a short time, it was thought that there were six subspecies of cheetah, but Acinonyx rex, the king cheetah, was abandoned as a subspecies (or species) after it was discovered the variation was only a recessive gene. The subspecies Acinonyx jubatus guttatus, the woolly cheetah, may also have been a variation due to a recessive gene. Other populations have been elevated to subspecies level, and there are again six subspecies recognized (Wozencraft 2005):
- Asiatic cheetah (Acinonyx jubatus venaticus): northern Africa (Algeria, Djibouti, Egypt, Mali, Mauritania, Morocco, Niger, Tunisia, and Western Sahara) and Asia (Afghanistan, India, Iran, Iraq, Israel, Jordan, Oman, Pakistan, Saudi Arabia, Syria, Russia, and the Commonwealth of Independent States)
- Northwest African cheetah (Acinonyx jubatus hecki): western Africa (Benin, Burkina Faso, Ghana, Mali, Mauritania, Niger, and Senegal)
- Acinonyx jubatus raineyii: eastern Africa (Kenya, Somalia, Tanzania, and Uganda)
- Acinonyx jubatus jubatus: southern Africa (Angola, Botswana, Democratic Republic of Congo, Mozambique, Malawi, South Africa, Tanzania, Zambia, Zimbabwe, and Namibia)
- Acinonyx jubatus soemmeringii: central Africa (Cameroon, Chad, Central African Republic, Ethiopia, Nigeria, Niger, and Sudan)
- Acinonyx jubatus velox
Morphs and variations
The king cheetah is a rare mutation of cheetah characterized by a distinct pelt pattern. It was first noted in Zimbabwe in 1926. In 1927, the naturalist Reginald Innes Pocock declared it a separate species, but reversed this decision in 1939 due to lack of evidence. In 1928, a skin purchased by Lord Rothschild was found to be intermediate in pattern between the king cheetah and spotted cheetah and Abel Chapman considered it to be a color form of the spotted cheetah. Twenty-two such skins were found between 1926 and 1974. Since 1927, the king cheetah was reported five more times in the wild. Although strangely marked skins had come from Africa, a live king cheetah was not photographed until 1974 in South Africa's Kruger National Park.
Cryptozoologists Paul and Lena Bottriell photographed one during an expedition in 1975. They also managed to obtain stuffed specimens. It appeared larger than a spotted cheetah and its fur had a different texture. There was another wild sighting in 1986—the first in seven years. By 1987, 38 specimens had been recorded, many from pelts.
Its species status was resolved in 1981, when king cheetahs were born at the De Wildt Cheetah and Wildlife Centre in South Africa. In May 1981, two spotted sisters gave birth there and each litter contained one king cheetah. The sisters had both mated with a wild-caught male from the Transvaal area (where king cheetahs had been recorded). Further king cheetahs were later born at the Center. It has been known to exist in Zimbabwe, Botswana and in the northern part of South Africa's Transvaal province.
A recessive gene must be inherited from both parents in order for this pattern to appear—which is one reason why it is so rare.
Other color variations
Other rare color morphs of the species include speckles, melanism, albinism and gray coloration. Most have been reported in Indian cheetahs, particularly in captive specimens kept for hunting.
The Mughal Emperor of India, Jahangir, recorded having a white cheetah presented to him in 1608. In the memoirs of Tuzk-e-Jahangiri, the Emperor says that in the third year of his reign, "Raja Bir Singh Deo brought a white cheetah to show me. Although other sorts of creatures, both birds and beasts have white varieties ... I had never seen a white cheetah. Its spots, which are (usually) black, were of a blue colour, and the whiteness of the body also inclined to blue-ishness." This suggests a chinchilla mutation, which restricts the amount of pigment on the hair shaft. Although the spots were formed of black pigment, the less dense pigmentation gives a hazy, grayish effect. As well as Jahangir's white cheetah at Agra, a report of "incipient albinism" has come from Beaufort West according to Guggisberg.
In a letter to "Nature in East Africa," H. F. Stoneham reported a melanistic cheetah (black with ghost markings) in the Trans-Nzoia District of Kenya in 1925. Vesey Fitzgerald saw a melanistic cheetah in Zambia in the company of a spotted cheetah.
Red (erythristic) cheetahs have dark tawny spots on a golden background. Cream (isabelline) cheetahs have pale red spots on a pale background. Some desert region cheetahs are unusually pale; probably they are better-camouflaged and therefore better hunters and more likely to breed and pass on their paler coloration. Blue (Maltese or gray) cheetahs have variously been described as white cheetahs with gray-blue spots (chinchilla) or pale gray cheetahs with darker gray spots (Maltese mutation). A cheetah with hardly any spots was shot in Tanzania on 1921 (Pocock), it had only a few spots on the neck and back and these were unusually small.
Cheetah fur was formerly regarded as a status symbol. Today, cheetahs have a growing economic importance for ecotourism and they are also found in zoos. Cheetahs are far less aggressive than other big cats and can be domesticated, so cubs are sometimes illegally sold as pets.
Cheetahs were formerly, and sometimes still are, hunted because many farmers believe that they eat livestock. When the species came under threat, numerous campaigns were launched to try to educate farmers and encourage them to conserve cheetahs. Recent evidence has shown that cheetahs will not attack and eat livestock if they can avoid doing so, as they prefer their wild prey. However, they have no problem with including farmland as part of their territory, leading to conflict.
Ancient Egyptians often kept cheetahs as pets, and also tamed and trained them for hunting. Cheetahs would be taken to hunting fields in low-sided carts or by horseback, hooded and blindfolded, and kept on leashes while dogs flushed out their prey. When the prey was near enough, the cheetahs would be released and their blindfolds removed. This tradition was passed on to the ancient Persians and brought to India, where the practice was continued by Indian princes into the twentieth century. Cheetahs continued to be associated with royalty and elegance, their use as pets spreading just as their hunting skills were. Other such princes and kings kept them as pets, including Genghis Khan and Charlemagne, who boasted of having kept cheetahs within their palace grounds. Akbar the Great, ruler of the Mughal Empire from 1556 to 1605, kept as many as 1,000 cheetahs (O'Brien et al. 1986). As recently as the 1930s, the Emperor of Abyssinia, Haile Selassie, was often photographed leading a cheetah by a leash.
The cheetah is a vulnerable species. Out of all the big cats, it is the least able to adapt to new environments. It has always proved difficult to breed in captivity, although recently a few zoos have managed to succeed at this, including the use of in-vitro fertilization. Once widely hunted for its fur, the cheetah now suffers more from the loss of both habitat and prey.
Cheetah cubs have a high mortality rate due to genetic factors and predation by carnivores in competition with the cheetah, such as the lion and hyena. Recent inbreeding causes cheetahs to share very similar genetic profiles. This has led to poor sperm, birth defects, cramped teeth, curled tails, and bent limbs. Some biologists now believe that they are too inbred to flourish as a species (Gugliotta 2008).
Cheetahs are included on the World Conservation Union (IUCN) list of vulnerable species (African subspecies threatened, Asiatic subspecies in critical situation) as well as on the United States Endangered Species Act: threatened species; Appendix I of CITES (Convention on International Trade in Endangered Species).
Approximately 12,400 cheetahs remain in the wild in 25 African countries; Namibia has the most, with about 2,500. Another 50 to 60 critically endangered Asiatic cheetahs are thought to remain in Iran.
- W. C. Wozencraft, "Cheetah," pages 532-533 in D. E. Wilson, and D. M. Reeder, eds., Mammal Species of the World, 3rd edition (Johns Hopkins University Press, 2005). ISBN 0801882214.
- Cat Specialist Group, "Acinonyx jubatus Vulnerable," in 2007 IUCN Red List of Threatened Species. 2002 entry. Retrieved on August 23, 2008. Database entry includes justification for why this species is near threatened
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