The cheetah (Acinonyx jubatus; //) is a large cat of the subfamily Felinae that occurs in North, Southern and East Africa, and a few localities in Iran. It inhabits a variety of mostly arid habitats like dry forests, scrub forests, and savannahs. The species is IUCN Red Listed as Vulnerable, as it suffered a substantial decline in its historic range in the 20th century due to habitat loss, poaching for the illegal pet trade, and conflict with humans. By 2016, the global cheetah population has been estimated at approximately 7,100 individuals in the wild. Several African countries have taken steps to improve cheetah conservation measures.
|Female cheetah in KwaZulu Natal, South Africa|
|Acoustic repertoire of cheetahs|
|Scientific classification |
|The range of the cheetah
Former range Low density Medium density High density
The cheetah was formally described by Johann Christian Daniel von Schreber in 1775 and is the only extant member of the genus Acinonyx. Its yellowish tan or rufous to greyish white coat is uniformly covered with nearly 2,000 solid black spots. Its body is slender with a small rounded head, black tear-like streaks on the face, deep chest, long thin legs and long spotted tail. It reaches 70–90 cm (28–35 in) at the shoulder, and weighs 21–72 kg (46–159 lb).
The cheetah breeds throughout the year, and is an induced ovulator. Gestation lasts nearly three months, resulting in a litter of typically three to five, in rare cases up to eight cubs. They are weaned at the age of about six months. After siblings become independent from their mother, they usually stay together for some time. It is active mainly during the day, with hunting its major activity. It is a carnivore and preys mainly upon antelopes. It stalks its prey to within 100–300 m (330–980 ft), charges towards it and kills it by tripping it during the chase and biting its throat to suffocate it to death. Female cheetahs are solitary or live with their offspring in home ranges. Adult males are sociable despite their territoriality, forming groups called coalitions.
African cheetahs may achieve successful hunts running at a speed of only 64 km/h (40 mph) while hunting due to their exceptional ability to accelerate, but are capable of accelerating up to 112 km/h (70 mph) on short distances of 100 m (330 ft). The cheetah is therefore the fastest land animal. Because of its prowess at hunting, the cheetah was tamed as early as the 16th century BC in Egypt to kill game at hunts. Cheetahs have been widely depicted in art, literature, advertising and animation.
The generic name Acinonyx probably derives from the combination of two Greek words: ἁκινητος (akinitos) meaning 'unmoved, motionless', and ὄνυξ (onyx) meaning 'nail, hoof'. A rough translation would be "immobile nails", a reference to the cheetah's limited ability to retract its claws. The word jubatus is Latin for 'crested'.
Felis jubatus was the scientific name used by Johann Christian Daniel von Schreber in 1777, who based his description of the species on earlier descriptions by Comte de Buffon and Thomas Pennant. The generic name Acinonyx was proposed by Joshua Brookes in 1828.
In the 19th and 20th centuries, several cheetah specimens were described and proposed as subspecies. In 1975, Reay H. N. Smithers (of the Ditsong National Museum of Natural History) identified five subspecies: A. j. hecki, A. j. jubatus, A. j. raineyi, A. j. soemmeringii and A. j. venaticus. A 2011 phylogeographic study found minimal genetic variation between A. j. jubatus and A. j. raineyi; only four subspecies could be identified. Their details are tabulated below:
|Southeast African cheetah (A. j. jubatus) Schreber, 1775), syn. A. j. raineyi Heller, 1913||This is the nominate cheetah subspecies. It occurs in Southern and East African countries including Namibia, Botswana, South Africa, Zimbabwe, Zambia, Mozambique, Kenya, Tanzania and Uganda. It is regionally extinct in Democratic Republic of the Congo, Rwanda and Burundi. In 2010, this cheetah was reported to persist in Iona National Park in southwestern Angola. It was introduced in the Hlane Royal National Park of Swaziland and reintroduced in Malawi's Liwonde National Park.
In 2007, the Southern African population was roughly estimated at less than 5,000 to maximum 6,500 adult individuals. Since 1999, the populations in Zimbabwe and Mozambique have fallen drastically following the civil wars in the 1980s and 1990s.
This subspecies is estimated to have diverged from the Asiatic cheetah 32,000 to 67,000 years ago.
|Asiatic cheetah (A. j. venaticus) Griffith, 1821||This subspecies is confined to Iran, and is the only surviving cheetah population in Asia. In the past the Asiatic cheetah had a wide distribution throughout middle Asia, from the Arabian Peninsula to the Indian subcontinent. The IUCN has classified this cheetah as Critically Endangered. In 2007, the total population was estimated at 60 to 100 individuals including juveniles. In 2017, fewer than 50 individuals were thought to be remaining in three subpopulations that are scattered over 140,000 km2 (54,000 sq mi) in Iran's central plateau.|
|Northeast African cheetah (A. j. soemmeringii) Fitzinger, 1855||This subspecies occurs in South Sudan, Ethiopia and Eritrea. It is part of captive breeding programs such as the European Endangered Species Programme (EEP) of the European Association of Zoos and Aquaria (EAZA). This subspecies is estimated to have diverged from the Southeast African cheetah 16,000 to 72,000 years ago.|
|Northwest African cheetah (A. j. hecki) Hilzheimer, 1913||This subspecies occurs in Northwestern Africa including southern Algeria, Benin, Burkina Faso and Niger. Small populations are known to exist in the Ahaggar and Tassili N'Ajjer National Parks in southern Algeria. In 2003, a population of 20 to 40 individuals was estimated in Ahaggar National Park. In Niger, cheetahs have been recorded in the Aïr Mountains, Ténéré, Termit Massif, Talak and Azaouak valley. In 1993, a population of 50 individuals were estimated in Ténéré. In Benin, the cheetah occurs in Pendjari National Park and W National Park. The status of this cheetah is obscure in Burkina Faso, where individuals may be confined to the southeastern region. With the total population estimated at less than 250 mature individuals, it is listed as Critically Endangered.|
|The Puma lineage of the family Felidae, depicted along with the Lynx and Felis lineages|
The cheetah's closest relatives are the cougar (Puma concolor) and the jaguarundi (Herpailurus yagouaroundi). These three species together form the Puma lineage, one of the eight lineages of Felidae. The sister group of the Puma lineage is a clade of smaller Old World cats that includes the genera Felis, Otocolobus and Prionailurus.
The three species of the Puma lineage evolved in North America two to three million years ago. They possibly had a common ancestor during the Miocene, from which they diverged 8.25 million years ago. The cheetah diverged from the puma and the jaguarundi around 6.7 million years ago.
A genome study suggests cheetahs have experienced two population bottlenecks – the first about 100,000 years ago and the second about 12,000 years ago – greatly lowering their genetic variability. These bottlenecks may correlate with migrations from North America into Asia and Africa (with the current African population being founded about 12,000 years ago), and/or with a depletion of prey species at the end of the Pleistocene.
The oldest cheetah fossils, found in eastern and southern Africa, date to 3.5-3 mya. Early Pleistocene fossils have been found in Bed I (dated 1.85-1.7 mya) of the Olduvai Gorge site in northern Tanzania. Cheetah-like cats are known from as late as 10,000 years ago from the Old World. The giant cheetah (Acinonyx pardinensis), significantly larger and slower compared to the modern cheetah, occurred in Eurasia and southern and eastern Africa in the late Villafranchian; in the Middle Pleistocene a smaller cheetah, A. intermedius, ranged from Europe to China. A variety of larger cheetah believed to have existed in Europe fell to extinction around half a million years ago.
Extinct North American cats resembling the cheetah had historically been assigned to Felis, Puma or Acinonyx. A phylogenetic analysis in 1990 placed these species under Miracinonyx (American cheetahs), that exhibited a high degree of physical similarity to the modern cheetah. However, subsequent research indicated that Miracinonyx is closer to the cougar than modern cheetahs. In fact, it is disputed whether Acinonyx species ever occurred in North America; Miracinonyx species may have developed similar traits via parallel evolution.
The diploid number of chromosomes in the cheetah is 38, the same as in most other felids. A remarkable feature of the cheetah is its unusually low genetic variability in comparison to other felids. Consequently, individuals show considerable genetic similarity to one another, as illustrated by skin grafts, electrophoretic evidence and reproductive surveys. This might have resulted from a prolonged period of inbreeding, following a genetic bottleneck during the last ice age. Such genetic uniformity can result in a low sperm count, decreased sperm motility, deformed flagella, difficulty in captive breeding and increased susceptibility to disease.
The king cheetah is a variety of cheetah with a rare mutation for cream-coloured fur marked with large, blotchy spots and three dark, wide stripes extending from their neck to the tail. In 1926 Major A. Cooper wrote about an animal he had shot near modern-day Harare. He noted its remarkable similarity to the cheetah, but the body was covered with fur as thick as that of a snow leopard and the spots merged to form stripes. He suggested it could be a cross between a leopard and a cheetah. As more such individuals were observed, it was established that they had non-retractable claws – a characteristic feature of the cheetah.
Reginald Innes Pocock described it as a new species by the name of Acinonyx rex ("rex" being Latin for "king", the name translated to "king cheetah"). However, in absence of proof to support his claim, he reverted from his proposal in 1939. Abel Chapman considered it to be a colour morph of the spotted cheetah. Since 1927 the king cheetah has been reported five more times in the wild; one was photographed in 1975.
King cheetahs have been reported from Zimbabwe, Botswana and northern Transvaal. In 1981 two female cheetahs at the De Wildt Cheetah and Wildlife Centre (South Africa) gave birth to one king cheetah each; either female had mated with a wild male from Transvaal. Subsequently more king cheetahs were born at the Centre. In 2012 the cause of this alternative coat pattern was found to be a mutation in the gene for transmembrane aminopeptidase Q (Taqpep), the same gene responsible for the striped "mackerel" versus blotchy "classic" pattern seen in tabby cats. Hence, genetically the king cheetah is simply a variety of the common cheetah and not a separate species. This case is similar to that of the black panthers. The appearance is caused by reinforcement of a recessive allele. As a result, if two mating cheetahs carry the mutated allele, then a quarter of their offspring can be expected to be king cheetahs.
The cheetah has a yellowish tan or rufous to greyish white skin, that is covered with nearly 2,000 solid black spots. The underbelly is completely white. It has a slender body, deep chest, a small rounded head, black tear-like streaks on the face, long thin legs and a long spotted tail. The head-and-body length ranges from 112–150 cm (44–59 in). Adult cheetahs average 70–90 cm (28–35 in) at the shoulder, and weigh 21–72 kg (46–159 lb). Its lightly built, slender form is in sharp contrast with the robust build of the big cats. It is taller than the leopard, which stands nearly 55–70 cm (22–28 in) at the shoulder. The weight range of the cheetah overlaps with that of the leopard, which weighs 28–65 kg (62–143 lb). On the other hand, the cheetah is significantly shorter than the lion, whose average height is nearly 120 cm (47 in). Moreover, it is much lighter than the lion, among which females weigh 126 kg (278 lb) and the much heavier males weigh 186 kg (410 lb). The largest cheetahs occur in southern Africa; eastern African cheetahs tend to be only slightly smaller. A sexually dimorphic species, males are typically larger than females.
The head is small and rounded compared to other big cats. Saharan cheetahs have narrow canine faces. Small, short, and rounded, the ears are marked by black patches on the back; the edges and base of the ears are tawny. The high-set eyes have round pupils. The whiskers, shorter and fewer in number than those of other felids, are fine and inconspicuous. The pronounced tear streaks are unique to the cheetah; these streaks originate from the corner of the eyes and run down the nose to the mouth. The role of these streaks is not well understood – they may protect the eyes from the sun's glare (a helpful feature as the cheetah hunts mainly during the day), or they could be used to define facial expressions. Every cheetah features a unique pattern of spots on its coat; hence, this serves as a distinct identity for each individual. The spots measure 3.2–5.1 cm (1.3–2.0 in). Cheetah fur is short and often coarse; fluffy fur covers the chest and the ventral side. Several colour morphs of the cheetah have been identified, including melanistic and albino forms. Black cheetah have been observed in Kenya and Zambia. In 1877–1878, Philip Sclater described two partially albino specimens from South Africa. A ticked (tabby) cheetah was photographed in Kenya in 2012. Juveniles are typically dark with long, loose, blue to grey hair. In adults the cape is reduced to a short mane, about 8 centimetres (3.1 in) long, on the neck and the shoulders. The exceptionally long and muscular tail, with a bushy white tuft at the end, measures 60–80 centimetres (24–31 in). While the first two-thirds of the tail are covered in spots, the final part is marked with four to six dark rings or stripes. The arrangement of the terminal stripes of the tail differs among individuals, but the stripe patterns of siblings tend to be similar. In fact, the tail of an individual will typically resemble its siblings' to a greater extent than it resembles that of its mother or any other individual.
The cheetah is sometimes confused with the leopard; it can be told apart by its small round spots that contrast with the leopard's rosettes, and the tear streaks that are absent in the leopard. The cougar possesses neither the tear streaks nor the spotted coat pattern of the cheetah. The serval resembles the cheetah in physical build, but is significantly smaller, has a shorter tail and its spots fuse to form stripes on the back.
The morphology of the cheetah differs notably from the big cats (genus Panthera). The face and the jaw are unusually shortened in the cheetah; the sagittal crest is poorly developed, possibly to reduce weight and enhance speed. In fact, the skull resembles that of the smaller cats. Another similarity to the smaller cats is the long and flexible spine, as opposed to the stiff and short one in other large felids. A 2001 study of felid morphology indicated the truncation of development of the middle phalanx bone in the cheetah at a relatively younger age than other felids could be a major reason for the remarkably different morphology of the cheetah. The cheetah appears to show convergent evolution with canids in morphology as well as behaviour; it has canine features such as a relatively long snout, long legs, a deep chest, tough foot pads and blunt, semi-retractable claws. Even the hunting behaviour of cheetahs resembles that of canids. In the 2001 study, it was observed that the claws of cheetah have features intermediate between those of felids and the wolf. In the Puma lineage, both the cheetah and the puma have short, wide skulls unlike the jaguarundi.
The cheetah has a total of 30 teeth; the dental formula is 184.108.40.206. The deciduous dentition is 3.1.2. The sharp, narrow cheek teeth help in tearing flesh, whereas the small and flat canines bite the throat of the prey to suffocate it. Males have slightly bigger heads with wider incisors and longer mandibles than females. Cheetahs can not open their mouths as wide as other cats due to the relatively shorter muscles between the skull and jaw. Digitigrades, cheetahs have tough foot pads that make it convenient to run on firm ground. The hind legs are longer than the forelegs. The relatively longer metacarpals, metatarsals (of the lower leg), radius, ulna, tibia, and fibula increase the length of each jump. The straightening of the flexible vertebral column also adds to the length.
Cheetahs have a high concentration of nerve cells arranged in a band in the centre of the eyes. This arrangement, called a "visual streak", significantly sharpens the vision. The cheetah features the most efficient visual streak among the felids. The nasal passages are short and large; the large nostrils are well accommodated due to the small size of the canines. The cheetah is unable to roar due to the presence of a sharp-edged vocal fold within the larynx.
The paws of the cheetah are narrower than those of other felids. The slightly curved claws lack a protective sheath and are weakly retractable (semi-retractable). Additionally, the claws of the cheetah are shorter as well as straighter than those of other cats. Absence of protection makes the claws blunt; however, the large and strongly curved dewclaw is remarkably sharp.
Ecology and behaviour
Cheetahs are active mainly during the day, whereas leopards, tigers, and lions are active mainly at night; Hunting is the major activity throughout the day; peaks are observed during dawn and dusk, indicating crepuscular tendencies (activity peaks during twilight). Groups rest in grassy clearings after dusk, though males and juveniles often roam around at night. Cheetahs often inspect their vicinity at observation points such as elevations; even while resting, they take turns at keeping a lookout.
Cheetahs tend to form several social groups among themselves – these include females with cubs, adolescent siblings and male "coalitions". These groups typically keep away from one another. Females are not territorial, and live with their offspring or stay alone. Young females typically stay back with their mothers, with whom they do not show any significant interaction. Weaned juveniles form mixed-sex groups; males eventually mature and try to acquire territories. A loose association between individuals of the opposite sex can be observed during the breeding season.
Males, though territorial, can group together for life and form "coalitions". In most cases, a coalition will comprise brothers born in the same litter who stayed together after weaning. These groups collectively defend their territories. However, if a cub is the only male in the litter, then two or three lone males may form a small group of solitary males, or a lone male may join an existing group. Males in coalitions establish territories that ensure maximum access to female; solitary males may or may not be territorial. A coalition generally has a greater chance of encountering and acquiring females for mating, however its large membership demands a greater amount of resources than do the solitary males or their groups. Some males alternate between solitude and coalitions, whichever ensures encounters with a greater number of females.
Home ranges and territories
Males in coalitions establish territories in locations that ensure maximum access to females. The sizes can be location specific; for instance, territories range from 33 to 42 km2 (13 to 16 sq mi) in the Serengeti but tend to be larger in the Phinda Private Game Reserve, varying between 57 and 161 km2 (22 and 62 sq mi). Territorial solitary males establish considerably bigger territories, as large as 777 km2 (300 sq mi) in the Serengeti or 1,390 km2 (540 sq mi) in central Namibia. A 1987 study showed territoriality depends on the size and age of males and the membership of the coalition. It concluded that solitary as well as grouped males have a nearly equal chance of coming across females, but the males in coalitions are notably healthier and have better chances of survival than their solitary counterparts. A study in the Serengeti, males who joined coalitions were found to be far more successful in acquiring territories than solitary males. The average period for which territories are held is four months for singletons, seven-and-a-half months for pairs, and 22 months for trios.
Males exhibit pronounced marking behaviour – territories, termite mounds, trees, common tracks, and junctions are marked by urine, faeces, and claw scratches. Males marking their territory by urination stand less than 1 m (3.3 ft) away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward. Territorial clashes can take place between two coalitions, or between coalitions and solitary males; these fights are rarely gruesome. Another major reason for fights is to acquire dominance in the breeding season; these can even involve cannibalism.
Instead of territories, females inhabit unguarded areas known as home ranges. The size of a home range depends mainly on prey availability. Although these ranges overlap frequently, there is rarely any interaction between females. Females regularly visit male territories. The greater the density of prey animals in an area, the smaller the home range of a female cheetah there. In areas with nomadic prey animals (such as the Thomson's gazelle in the Serengeti and the springbok in the Kalahari Desert), the home ranges cover hundreds of square kilometres. In contrast, home ranges are merely 100–200 square kilometres (39–77 sq mi) large where sedentary prey, such as the impala in the Kruger National Park, is available.
The cheetah is a vocal felid. A wide variety of cheetah vocalisations have been identified by several terms, but most of these lack a detailed acoustic description, which makes it difficult to assess reliably which term denotes which sound. The cheetah purrs when content, or greeting known individuals. A characteristic of purring is that it is realised on both egressive and ingressive airstreams. Other vocalisations identified include:
- Growling: Often accompanied by hissing and spitting, the cheetah growls to show its annoyance, or when faced with danger. A study showed that growls consist of numerous short pulses with a combined duration of up to five seconds.
- Moaning or yowling: This is an escalated version of growling and is often combined with it. It is typically displayed when the danger increases. A study found that yowls could last as long as two seconds.
- Agonistic vocalisations: this term denotes a combination of growls, moans, and hisses that is followed by spitting, a feature more conspicuous in cheetah than in other cats. In addition to spitting, the cheetah hits the ground with its front paws.
- Bleating: Similar to the meow of the domestic cat, the cheetah can bleat, and sometimes moan, when a larger predator deprives it of its prey.
- Chirping or stutter-barking: A cheetah chirps when excited (for instance, when gathered around a kill). This vocalisation can also be used at social meetings, during courtship, or in attempting to find another; the chirp of a mother searching for her cubs, which sounds more like the yelp of a dog than the chirp of a bird, can be heard up to 2 kilometres (1.2 mi) away. A study estimated the chirp's total duration as 0.09 to 0.5 seconds.
- Churring: The purpose of this sound is similar to that of the chirp. It may resemble a growl. The cheetah's chirp is similar to the soft roar of the lion, and its churr as the latter's loud roar. The churr is staccato and has a shorter range than the chirp. A study showed that churrs comprise 3–15 separate pulses and last 0.1–1.3 seconds.
- Mother-cub vocalisations: Apart from chirping, mothers use some other sounds to interact with their cubs. A repeated ihn ihn is used to gather the cubs, while a prr prr is used to guide them on a journey. A low-pitched alarm call is used to warn the cubs to stand still in the presence of danger.
- Whirring: This sound is produced by cubs bickering over a kill; the pitch rises with the intensity of the quarrel, and ends on a harsh note.
Scent plays a significant role in olfactory communication. Cheetahs often investigate urine-marked places (territories or common landmarks) for a long time by crouching on their forelegs and carefully smelling the place. Then the male will itself urinate there and sniff at its own scent before leaving. Other observing individuals will repeat the ritual. Females may also show marking behaviour but less prominently than the males. Females in oestrus will show maximum urine-marking, and her excrement can attract males from far off.
The tear streaks are a means of visual communication. The tear streaks combined with the black lips and the contrasting white fur give the face a striking appearance and form clear expressions when viewed from a close range. The ears and the face are obscure from a distance, and so are the expressions. On the other hand, the tail is quite conspicuous and is probably used by mothers to direct juveniles to follow them.
Cheetahs engage in several displays during fights, hunting, or self-defence. Prior to a sprint, the cheetah will hold its head down, with aggression on its face, and approach the target in a stiff gait. The aggressive expression is maintained during the run. To defend itself or its prey, a cheetah will hold its body low to the ground, and produce a snarl with its mouth wide open, the eyes staring threateningly ahead and the ears folded backward. This may be accompanied by moans, hisses, and growls. In more severe cases, the ground is hit with the paws. Fights are characterised by biting, tearing out the fur and attempts at strangling on both sides.
Hunting and competitors
The cheetah is a carnivore that prefers medium-sized prey with a body mass ranging from 23 to 56 kg (51 to 123 lb). Preferred species in Africa include Thomson's gazelle, Grant's gazelle, springbok, impala and blesbok. Larger prey, such as ostrich, warthog, wildebeest, zebra and buffalo are typically avoided. A study showed that a major proportion of the diet of Asiatic cheetahs consists of livestock; local species such as chinkara, desert hare, goitred gazelle, ibex, rodents, and wild sheep are also hunted. Generally, only groups of cheetahs will attempt to kill larger animals, although mothers with young cubs will attempt to secure a large prey all by themselves. There are no records of cheetah killing human beings. The diet of a cheetah depends on the area in which it lives. For example, on the East African plains, its preferred prey is the Thomson's gazelle, somewhat smaller than the cheetah. In contrast, in Kwa-Zulu Natal the preferred prey is the significantly larger nyala, males of which can weigh up to 130 kg (290 lb). They do, however, opt for young and adolescent targets, which make up about 50% of the cheetah diet despite constituting only a small portion of the prey population.
Cheetahs hunt primarily throughout the day, but geographical variations exist. For instance, cheetahs in the Sahara and the Masai Mara hunt after sunset to escape the high temperatures of the day. In the Serengeti they hunt when the lions and hyenas are inactive. A study in Nairobi National Park in Kenya showed that the success of the hunt depends on the species, age, sex, and habitat of the prey, and the size of the hunting herd or the efficiency of the hunting individual. Cheetahs hunt by vision rather than by scent. Prey is located from observation points or while roaming. Animals toward the edges of the herd are preferred. The cheetah will stalk their prey to within 100–300 m (330–980 ft); it will try to approach it as closely as possible while concealing itself in cover, sometimes even up to within 60 m (200 ft) of the prey. The cheetah will crouch and move slowly while stalking, occasionally becoming motionless. The chase usually lasts less than a minute; if the cheetah fails to make a kill quickly, it will give up. Cheetahs have an average hunting success rate of 40 to 50%.
Cheetahs kill their prey by tripping it during the chase; the cheetah can use its strong dewclaw to knock the prey off its balance. To kill medium- to large-sized prey, the cheetah bites the prey's throat to suffocate it. A bite on the back of the neck or the snout is enough to kill smaller prey. The prey is then taken to a shaded place; the cheetah, highly exhausted after the chase, rests beside the kill and pants heavily for nearly five to 55 minutes. Groups of cheetah devour the kill peacefully, though minor growling may be observed. Cheetahs not involved in hunting will immediately start eating. Cheetahs can consume large quantities of food. In a study at the Etosha National Park (Namibia), the cheetah consumed as much as 10 kilograms (22 lb) within two hours and stayed close to the remains for 11 hours. Cheetahs move their heads from side to side so that the sharp carnassial teeth effectively tear the flesh, which can then be swallowed without chewing. They typically begin with the hindquarters, and then progress toward the abdomen and the spine. Rib bones are chewed on at the ends, and the limbs are not generally torn apart while eating.
The cheetah, especially mothers with young cubs, are highly vigilant; they need to remain on a lookout for large carnivores who might steal the prey or harm the cubs, and for any potential prey. In Africa, the cheetah surrenders its kill to sturdier carnivores such as lions, leopards, spotted and brown hyenas, and wild dogs. Cheetahs lose around 10 to 15% of their kills to other predators; the percentage was found to be as high as 50% in a 1986 study. Cheetahs have rarely been observed to feed on the kills of other carnivores; this may be due to vultures and spotted hyena adroitly capturing and consuming heavy carcasses within a short time.
Speed and acceleration
The cheetah's thin and light body makes it well-suited to short, explosive bursts of speed, rapid acceleration, and an ability to execute extreme changes in direction while moving at high speed. Research has indicated that the cheetah's athleticism is critical to the cat's predatory success rate. These adaptations account for much of the cheetah's ability to catch fast-moving prey.
The cheetah is the fastest land animal. It was called the "felid version of the greyhound", as both have similar morphology and the ability to reach tremendous speeds in a shorter time than other mammals.
The large nasal passages ensure fast flow of sufficient air, and the enlarged heart and lungs allow the enrichment of blood with oxygen in a short time. This allows cheetahs to rapidly regain their stamina after a chase. During a typical chase, their respiratory rate increases from 60 to 150 breaths per minute. While running, in addition to having good traction due to their semi-retractable claws, cheetahs use their tail as a rudder-like means of steering that enables them to make sharp turns, necessary to outflank antelopes that often change direction to escape during a chase. The protracted claws increase grip over the ground, while foot pads make the sprint more convenient over tough ground. The tight binding of the tibia and the fibula restrict rotation about the lower leg, thus stabilising the animal throughout the sprint; the downside, however, is that this reduces climbing efficiency. The pendulum-like motion of the scapula increases the stride length and assists in shock absorption. The extension of the vertebral column can add as much as 76 cm (30 in) to the length of a stride. During more than half of the time of the sprint, the animal has all four limbs in the air; this also contributes to the stride length.
By 1973, cheetah sprinting distance was thought to be limited by the building up of excessive body heat. A biologging study with six free-living cheetahs in Namibia revealed that their elevated body temperature did not compromise their chasing prey. After successful hunts, they had a 0.6 to 0.8 °C higher body temperature than after unsuccessful chases.
In general, the speed of a hunting cheetah averages 64 km/h (40 mph) during a chase, interspersed with a few short bursts when the speed varies between 104 and 120 km/h (65 and 75 mph); the most reliable measurement of the typical speed during a short chase is 112 km/h (70 mph). However, this value of the maximum speed measured in 1957 is disputed. Measurements using solar-powered GPS collars in 367 hunts show a maximum speed of 93 km/h (58 mph) while hunting. The speeds attained by the cheetah may be only slightly greater than those achieved by the pronghorn 88.5 km/h (55.0 mph) and the springbok 88 km/h (55 mph). Yet the cheetah has a greater probability of succeeding in the chase due to its exceptional acceleration – it can attain a speed of 75 km/h (47 mph) in just two seconds. One stride or jump of a galloping cheetah averages 6.7 metres (22 ft). Similarly, the ability to change direction rapidly is pivotal in ensuring hunting success. Cheetahs typically walk at 3–4 kilometres per hour (1.9–2.5 mph).
Speed and acceleration values for the hunting cheetah may be different from those for the non-hunting because, while engaged in the chase, the cheetah is more likely to be twisting and turning and may be running through vegetation. In 2012 an 11-year-old cheetah from the Cincinnati Zoo named Sarah made a world record by running 100 m (330 ft) in 5.95 seconds over a set run, during which she ran a recorded maximum speed of 98 km/h (61 mph). A study of five wild cheetahs (three females, two males) during hunting reported a maximum speed of 93 km/h (58 mph), with an average of 48 to 56 km/h (30 to 35 mph). Speed can be increased by almost 10 km/h (6 mph) in a single stride. The average chase is 173 m (568 ft) and the maximum ranges from 407 to 559 m (1,335 to 1,834 ft).
Cheetahs breed throughout the year; they are induced ovulators. Females become sexually mature at 21 to 22 months of age. Females are polyoestrus – they have an oestrus ("heat") cycle every 12 days (this can vary from 10 to 20 days), each oestrus lasting one to three days. A female can give birth again after 17 to 20 months; however, on the loss of a whole litter mothers can mate again. Urine-marking in males becomes more pronounced when a female in their vicinity comes into oestrus. Males fight among one another to secure access to the female; even males in a coalition may show some aggression toward one another on approaching a female. One male eventually wins dominance over the others. Mating, observed mainly at night, begins with the male approaching the female, who lies down on the ground. No courtship behaviour is observed; the male immediately secures hold of the female's nape and copulation takes place. The pair then ignore each other and part ways. However, they meet and copulate a few more times within the next few days. Polyandrous, females can mate with several males. The mean number of motile sperm in a single ejaculation is nearly 25.3 million. Most females never successfully raise a cub all the way to maturity, since the mortality rate is very high.
Gestation lasts nearly three months. The number of cubs born can vary from one to eight, though the common number is three to five. Birth takes place in a sheltered place such as thick vegetation. Each cub weighs nearly 150–400 g (5.3–14.1 oz) at birth; the eyes, shut at birth, open in four to 11 days. Newborn cubs can crawl and spit; they start walking by the age of two weeks. Their nape, shoulders and back are thickly covered with long bluish grey hair. This downy underlying fur, called a "mantle", gives them a Mohawk-type appearance; this fur is shed as the cheetah grows older. It has been suggested that this mane gives a cheetah cub the appearance of the honey badger, and could act as a camouflage in both animals. Cheetah cubs are highly vulnerable during the first few weeks of their life; mothers keep their cubs hidden in dense vegetation for the first month. Generation length of the cheetah is six years.
Cubs start following their mothers at six weeks. The mother frequently shifts the cubs to new locations. A study of play behaviour of cheetah cubs showed that cubs tend to play after nursing or while they are on the move with their mothers. Play involves plenty of agility; attacks are seldom lethal. Playing cubs stay near their mothers. The study further revealed that while the cubs showed improvement in catching each other as they grew up, the ability to crouch and hide did not develop remarkably. Thus, it was suggested that play helps develop only certain aspects of predator defence. Weaning occurs at three to six months of age. The mother brings kills to her cubs; the cubs might purr as the mother licks them clean after the meal. Cubs as young as six months try to capture small prey like hares and juvenile gazelles. However, they may have to wait until as long as 15 months of age to make a successful kill on their own.
The offspring may stay with the mother for 13 to 20 months, associating with one another and feeding on kills together. After weaning, juveniles may form mixed-sex herds; young females may stay back with their mother, but there is hardly any interaction between the mother and daughters. The females in the mixed-sex herd gradually move out as they near sexual maturity. In the Serengeti, average age of independence of 70 observed litters was 17.1 months. Young females had their first litters at the age of about 2.4 years and subsequent litters about 20 months later. The lifespan of wild cheetahs is 14 to 15 years for females; their reproductive cycle typically ends by 12 years of age. Males generally live as long as 10 years.
High mortality rates have been recorded in the Serengeti. In a 1994 study, nearly 77% of litters died before eight weeks of birth, and nearly 83% of those alive could not make it to adolescence (14 weeks). Lions emerged as the major predator of juveniles, accounting for nearly 78% of the deaths. The study concluded that the survival rate of cubs until weaning was a mere 4.8%. This was attributed to the open terrain of the region, which does not allow cheetahs to conceal themselves. Cheetah cubs face higher mortality than most other large mammals.
It has been suggested that the significant lack of genetic diversity in cheetahs is a cause of poor quality and production of sperm, and birth defects such as cramped teeth, kinked tails, and bent limbs. Cheetahs do have low fertility rates, but they appear to have flourished for thousands of years with these low levels of genetic variance. Cheetah expert Laurie Marker points out that the high level of genetic uniformity would mean that if an infectious disease surfaced in a population, all of them have (or lack) the same level of immunity. In 1982, 60% of the cheetah population in the Wildlife Safari (Oregon, United States) died due to a peritonitis epidemic.
Distribution and habitat
The cheetah inhabits a variety of habitats. In Africa, it has been observed in dry forests, scrub forests, and savannahs. In prehistoric times, the cheetah was distributed throughout Asia, Africa, and Europe. Gradually, it vanished from Europe. Nearly 500 years ago, the cheetah was still common throughout Africa, though it avoided deserts and tropical forests. In Eurasia, Afghanistan, Iran, Iraq, Palestine, Syria, and the Ganga and Indus river valleys in South Asia sheltered large numbers of cheetahs. However, today the cheetah has been exterminated from the majority of its earlier range. The IUCN estimates that the total expanse of the range of the cheetah in earlier times was approximately 25,344,648 km2 (9,785,623 sq mi); the range (as of 2015) has since then reduced to 2,709,054 km2 (1,045,972 sq mi), a substantial decline of 89%.
The African cheetah is found mainly in the eastern and southern regions; its presence across the continent has declined to a mere 10% of the historical range. The range in eastern Africa has reduced to 6% of its original extent, so that presently it is distributed in an area of 310,586 km2 (119,918 sq mi). In the Horn of Africa, the cheetah occurs in Ethiopia, Kenya, South Sudan, Tanzania, and Uganda. The range has not reduced as much in the southern part of the continent, where it occurs in an area of 1,223,388 km2 (472,353 sq mi), 22% of its original range. Significant populations thrive in south-western Angola, Botswana, Malawi, south-western Mozambique, Namibia, northern South Africa, southern Zambia, and Zimbabwe. Very few isolated populations occur in the Sahara; the population density in this region is as low as two to three individuals per 10,000 km2 (3,900 sq mi). They occur in very low numbers in northern and western Africa.
The distribution of prey may influence habitat preferences; in a study in the Kruger National Park, female cheetahs were found to spend a significant amount of time in woodlands, where impala occurred. It was suggested that though the forested area was unsuitable for hunting, the females preferred woodlands to encounter more impala. Male coalitions, on the other hand, shunned dense habitats and spent most of the time in open savannahs. An explanation given for this was that the coalitions prefer larger prey than impala. Although they do not prefer montane regions, cheetahs can occur at elevations as high as 4,000 m (13,000 ft). An open area with some cover, such as diffused bushes, is probably ideal for the cheetah because it needs to stalk and pursue its prey over a distance, exploiting its speed. This also minimises the risk of encountering larger carnivores. Complete lack of cover, however, can be a cause of prey loss and mortality.
In the past, the cheetah ranged across vast stretches in Asia, from the Arabian Peninsula in the west to the Indian subcontinent in the east, and as far north as the Caspian and Aral Seas. Today, the cheetah has been extirpated in the majority of its historic range, except Iran and possibly a few areas in Afghanistan and Turkmenistan.
Status and threats
The cheetah has been classified as Vulnerable by the IUCN; it is listed under Appendix I of the Convention on the Conservation of Migratory Species of Wild Animals (CMS) and Appendix I of CITES (Convention on International Trade in Endangered Species). In 2014 the CITES Standing Committee recognised the cheetah as a "species of priority" in their strategies in northeastern Africa to counter wildlife trafficking. As of 2015, the IUCN gives the total number of surviving individuals as nearly 6,700. Regional estimates have been given as: 1,960 in eastern Africa (as of 2007); 4,190 in southern Africa (as of 2007); and 440 in western, central, and northern Africa (as of 2012). The southern half of the continent, therefore, is home to the largest number of cheetah. 29 sub-populations have been identified, of which most consist of no more than 500 individuals. A small population of 60 to 100 individuals was reported from Iran in 2007. Populations are feared to be declining, especially those of adults.
The cheetah is threatened by habitat loss through agricultural and industrial expansion; moreover, the species apparently requires a large area to live in as indicated by its low population densities. It appears to be less capable of coexisting with humans than the leopard. Human interference disturbs hunting and feeding of cheetah. With 76% of its range consisting of unprotected land, the cheetah is often targeted by farmers and pastoralists who attempt to protect their livestock. However, cheetah is not known to prey on livestock. Game hunters may also try to harm cheetahs as they deprive them of valuable game. Roadkill is another threat, especially in areas where roads have been constructed near natural habitat or protected areas. Cases of roadkill involving cheetahs have been reported from Kalmand, Iran, Touran National Park, and Bafq. The threat posed by infectious diseases may be minor, given the low population densities and hence the reduced chance of infection.
In 2016, it was estimated that there are just 7,100 cheetahs remaining in the wild, and simulation modelling suggested that they are at risk of extinction. The authors suggested a re-categorisation on the IUCN Red List for the species from vulnerable to endangered.
The IUCN has recommended co-operation between countries across the cheetah's range to minimise the conflict between cheetahs and human beings. A 2016 study showed that ecotourism can have a significantly positive impact on the conservation of the cheetah. Although the requirement of space for the habitat would have to be compromised in most cases, establishment of private reserves for cheetahs and ensuring the absence of predators and poachers could be a successful conservation measure. Additionally, the financial benefits accrued and the awareness generated can further aid the cause of the cheetah. At the same time, the animals should not be unnecessarily handled or disturbed, as cheetahs are particularly sensitive to human interference.
The Range Wide Conservation Program for Cheetah and African Wild Dogs (RWCP), the brainchild of Sarah Durant and Rosie Woodroffe (of the Zoological Society of London), was started in 2007 with the primary aim of ensuring better conservation measures for the cheetah and the African wild dog – two species with very low population densities in Africa. Funded by the The Howard G. Buffett Foundation, the program is a joint initiative of the IUCN Cat and Canid Specialist Groups, the Wildlife Conservation Society and the Zoological Society of London. Its major goals include a review of the conservation policies adopted by African countries, and assessment and action regarding illegal hunting and trade. National conservation plans have been successfully developed for several African countries. In a 2007 paper, Durant emphasised the role of land management and improvement in connectivity across the range in cheetah conservation, in the lack of which the populations might face severe fragmentation.
In the 20th century, the populations of cheetah in India saw a drastic fall. The last physical evidence of the cheetah in India was thought to be three individuals, all shot by the Maharajah of Surguja (a man also noted for holding a record for shooting 1,360 tigers), in 1947 in eastern Madhya Pradesh, but a female was sighted in Koriya district, present-day Chhattisgarh, in 1951. During the early 2000s, scientists from the Centre for Cellular and Molecular Biology (CCMB), Hyderabad, proposed a plan to clone Asiatic cheetahs obtained from Iran. India asked Iran to transport one live pair to India, or, if that was not possible, allow them to collect sperm and eggs of the cheetah pair in Iran itself. However, Iran rejected both proposals.
In September 2009, the then Minister of Environment and Forests, Jairam Ramesh, assigned the Wildlife Trust of India and the Wildlife Institute of India with the task of examining the potential of cheetah reintroduction in the nation. The report, submitted in 2010, showed that the Kuno Wildlife Sanctuary and Nauradehi Wildlife Sanctuary in Madhya Pradesh, and Shahgarh Landscape and Desert National Park in Rajasthan have a high potential to support reintroduced cheetah populations. These areas were found to be spacious; of these four areas, the Kuno Wildlife Sanctuary had the largest available area, 6,800 square kilometres (2,600 sq mi). Moreover, these were rich in prey availability. The Sanjay National Park, though comprising an area of 12.500 square kilometres (4.826 sq mi) and having supported cheetah populations before the independence of India in 1947, is no longer suitable for the cheetah due to low prey density and risks of poaching.
In 2001 the Iranian government collaborated with the Cheetah Conservation Fund, the IUCN, Panthera, United Nations Development Programme (UNDP), and the Wildlife Conservation Society on the Conservation of Asiatic Cheetah Project (CACP) to protect the natural habitat of the Asiatic cheetah and its prey, to ensure that development projects do not hamper its survival, and to highlight the plight of the Asiatic cheetah. Iran declared 31 August as National Cheetah Day in 2006.
Interaction with human beings
The cheetah shows little aggression toward human beings, and can be easily tamed, as it has been since antiquity. Two primary theories have been put forth to explain the expansion of the domesticated cheetah. Historians who accept the Sumerian origin of the domesticated cheetah – such as Heinz F. Friederichs and Burchard Brentjes – hold that the animal gradually spread out to central and northern Africa, from where it reached India. On the other hand, historians such as Frederick E. Zeuner accept the Egyptian origin and state that the cheetah gradually spread into central Asia, Iran, and India. Reliefs in the Deir el-Bahari temple complex tell of an expedition by Egyptians to the Land of Punt during the reign of the pharaoh Hatshepsut (1507–1458 BC) that fetched, among other things, animals called "panthers" for Egypt. Two types of "panthers" were depicted in these sculptures: leashed cheetahs, referred to as "panthers of the north", and sturdy leopards, referred to as "panthers of the south". During the New Kingdom (16th to 11th centuries BC), cheetahs were common pet animals for the royalty, who adorned the animals with ornate collars and leashes. The Egyptians would use their dogs to bring the concealed prey out in the open, after which a cheetah would be set upon it to kill it. A Sumerian seal dating back to nearly 3000 BC, featuring a leashed animal resembling a cheetah, has fuelled speculation that the cheetah might have been first domesticated and used for hunting in Sumer (Mesopotamia). However, Thomas T. Allsen argues that the depicted animal might not be a cheetah given its largely dog-like features; moreover, the background gives an impression of a montane area, which the cheetah does not typically inhabit.
In the third century AD, Roman author Claudius Aelianus wrote of tame panthers in India and "smaller lions" that would be used for tracking and hunting; the account cannot be very reliable as Roman, as well as Greek, literature is not generally clear in its references to different types of cats. The Romans may have referred to the Cheetah as the Leopardos (λεοπάρδος) or Leontopardos (λεοντόπαρδος), believing it to be the result of hybridisation between a Leopard and a Lion due to the manes they possess as cubs and the difficulty of breeding them in captivity. A Roman hunting Cheetah is depicted in the 4th century mosaic from Lod, Israel. They continued use into the Byzantine period of the Roman empire, with "hunting leopards" being mentioned in the Cynegetica of Koukoules. The 11th-century Clephane Horn, possibly of Byzantine origin, is believed to depict domesticated hunting cheetahs.
Hunting cheetahs are known in pre-Islamic Arabic art from Yemen. Hunting with cheetahs became more prevalent toward the seventh century AD. In the Middle East, the cheetah would accompany the nobility to hunts in special seats behind saddles. Cheetahs continued to be associated with royalty and elegance in western Asia until as late as the 19th century. The first phase of taming would take several weeks, in which the cheetah would be kept tethered and made to get accustomed to human beings. Next, the cheetah would be tempted with food and trained to mount horses. Finally, its hunting instincts would be aroused by slaughtering animals before it. The whole process could take as long as a year to complete. In eastern Asia, the records are confusing as regional names for the leopard and the cheetah may be used interchangeably. The earliest depiction of cheetahs from eastern Asia dates back to the Tang dynasty (7th to 10th centuries AD); paintings depict tethered cheetahs as well as cheetahs mounted on horses. Chinese emperors would use cheetahs, as well as caracals, as gifts. In the 13th and the 14th centuries, the Yuan rulers bought numerous caracals, cheetahs, and tigers from the western parts of the empire and Muslim merchants, in return for gold, silver, cash, and silk. According to the Ming Shilu, the subsequent Ming dynasty (14th to 17th centuries) continued this practice. The cheetah gradually entered Eurasia toward the 14th century, though they never became as popular as they had in the Middle East. The Mughal ruler Akbar the Great (1556–1605) is said to have kept as many as 1000 cheetahs. However, his son Jahangir wrote in his memoirs, Tuzk-e-Jahangiri, that only one of them gave birth to cubs. Mughal rulers trained cheetahs as well as caracals in a similar way as the West Asians, and used them to hunt game – especially blackbuck. The rampant hunting severely affected the populations of wild animals.
Mortality under captivity is generally high; reasons include stillbirths, birth defects, cannibalism, hypothermia, neglect of cubs by mothers, and infectious diseases. A study comparing the health of captive and wild cheetahs noted that despite having similar genetic make-up, wild cheetahs are far healthier than their captive counterparts. The study identified possible stress factors such as restricted habitat and interaction with human beings and other carnivores, and recommended private and spacious areas for captive cheetahs. A study of diseases suffered by captive cheetahs in the period 1989–92 in several North American zoos showed that hepatic veno-occlusive disease, a disease of the liver, had affected 82% of the deceased cheetahs, caused nine deaths, and occurred in 51% of living females. Chronic gastritis was detected in 91% of the population. Glomerulosclerosis, a disease of the kidneys, emerged as another significant disease, affecting 84% of the cheetahs; another renal disease, nephrosclerosis, affected 39% of the cheetahs. Feline infectious peritonitis caused two deaths. Pneumonia was a major cause for juvenile deaths. Another study concluded that excess of vitamin A in their diets could result in veno-occlusive disease in their livers.
Moreover, cheetahs are poor breeders in captivity, while wild individuals are far more successful. In a 1992 study, females in Serengeti were found to have 95% success rate in breeding. In contrast, only 20% of the North American captive cheetahs bred successfully in 1991. Studies have shown that in-vitro fertilisation in cheetah poses more difficulties than are faced in the case of other cats. On November 26, 2017, a female cheetah named Bingwa gave birth to eight cubs in the Saint Louis Zoo setting a record for the most captive births for an African cheetah. One strategy for helping captive cheetahs breed is to pair them with a companion dog. Janet Rose-Hinostroza, an animal training supervisor at the San Diego Zoo Safari Park, told National Geographic in 2015 that "a dominant dog is very helpful because cheetahs are quite shy instinctively, and you can't breed that out of them. When you pair them, the cheetah looks to the dog for cues and learns to model their behavior. It's about getting them to read that calm, happy-go-lucky vibe from the dog."
The cheetah has been widely portrayed in a variety of artistic works. In Bacchus and Ariadne, an oil painting by the 16th-century Italian painter Titian, the chariot of the Greek god Dionysus (Bacchus) is depicted as being drawn by two cheetahs. The cheetahs in the painting were previously considered to be leopards. In 1764 English painter George Stubbs commemorated the gifting of a cheetah to George III by the English Governor of Madras, Sir George Pigot in his painting Cheetah with Two Indian Attendants and a Stag. The painting depicts a cheetah, hooded and collared by two Indian servants, along with a stag it was supposed to prey upon. The 1896 painting The Caress, by the 19th-century Belgian symbolist painter Fernand Khnopff, is a representation of the myth of Oedipus and the Sphinx. It portrays a creature with a woman's head and a cheetah's body (often misidentified as a leopard's).
The Bill Thomas Cheetah American sports/racing car, a Chevrolet-based coupe first designed and driven in 1963, was an attempt to challenge Carroll Shelby's Shelby Cobra in American sports car competition of the 1960s era. Due to only two dozen or fewer chassis ever being built, with only a dozen of these being complete cars, the Cheetah was never homologated for competition beyond prototype status, with its production ending in 1966.
A variety of literature mentions the cheetah. In 1969 author Joy Adamson, of Born Free fame, wrote The Spotted Sphinx, a biography of her pet cheetah Pippa. Hussein, An Entertainment, a novel by Patrick O'Brian set in the British Raj period in India, illustrates the practice of royalty keeping and training cheetahs to hunt antelopes. The book How It Was with Dooms tells the true story of a family raising an orphaned cheetah cub named Dooms in Kenya. The 2005 film Duma was loosely based on this book.
The cheetah has often been featured in marketing and animation. In 1986 Frito-Lay introduced the Chester Cheetah, an anthropomorphic cheetah, as the mascot for their Cheetos. The first release of Apple Inc.'s Mac OS X, the Mac OS X 10.0, was code-named "Cheetah"; the subsequent versions released before 2013 were all named after cats. The animated series ThunderCats had a character named "Cheetara", an anthropomorphic cheetah, voiced by Lynne Lipton. Comic book superheroine Wonder Woman's chief adversary is Dr. Barbara Ann Minerva, alias The Cheetah.
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|Wikispecies has information related to Acinonyx jubatus|
|Wikimedia Commons has media related to Acinonyx jubatus.|
- "Cheetah" at the Encyclopedia of Life
- "Cheetah Acinonyx jubatus". IUCN/SSC Cat Specialist Group.
- "Acinonyx jubatus". Biodiversity Heritage Library.
- "Acinonyx jubatus". Integrated Taxonomic Information System.
- Cheetah Conservation Fund
- "Fake flies and cheating cheetahs: measuring the speed of a cheetah". Australian Broadcasting Corporation.