52-552: Boinae Calabariinae Candoiinae Erycinae Sanziniinae Ungaliophiinae The Boidae , commonly known as boas or boids , are a family of nonvenomous snakes primarily found in the Americas, as well as Africa, Europe, Asia, and some Pacific islands. Boas include some of the world's largest snakes, with the green anaconda of South America being the heaviest and second-longest snake known; in general, adults are medium to large in size, with females usually larger than
104-652: A family that had a common ancestor about 10 to 15 million years ago . The evolutionary radiation of the Felidae began in Asia during the Miocene around 8.38 to 14.45 million years ago . Analysis of mitochondrial DNA of all Felidae species indicates a radiation at 6.46 to 16.76 million years ago . The genus Felis genetically diverged from other Felidae around 6 to 7 million years ago . Results of phylogenetic research shows that
156-464: A nictitating membrane , allowing them to blink without hindering their vision. The domestic cat's hearing is most acute in the range of 500 Hz to 32 kHz. It can detect an extremely broad range of frequencies ranging from 55 Hz to 79 kHz, whereas humans can only detect frequencies between 20 Hz and 20 kHz. It can hear a range of 10.5 octaves , while humans and dogs can hear ranges of about 9 octaves. Its hearing sensitivity
208-520: A "diagonal" gait: The diagonally opposite hind and fore legs move simultaneously. Cats are generally fond of sitting in high places or perching . A higher place may serve as a concealed site from which to hunt; domestic cats strike prey by pouncing from a perch such as a tree branch. Another possible explanation is that height gives the cat a better observation point, allowing it to survey its territory. A cat falling from heights of up to 3 m (9.8 ft) can right itself and land on its paws. During
260-507: A cat's pupils expand to cover most of the exposed surface of its eyes. The domestic cat has rather poor color vision and only two types of cone cells , optimized for sensitivity to blue and yellowish green; its ability to distinguish between red and green is limited. A response to middle wavelengths from a system other than the rod cells might be due to a third type of cone. This appears to be an adaptation to low light levels rather than representing true trichromatic vision. Cats also have
312-588: A cosegregation between the ASIP allele and coat black coloration. Cats have excellent night vision and can see at one sixth the light level required for human vision. This is partly the result of cat eyes having a tapetum lucidum , which reflects any light that passes through the retina back into the eye, thereby increasing the eye's sensitivity to dim light. Large pupils are an adaptation to dim light. The domestic cat has slit pupils , which allow it to focus bright light without chromatic aberration . At low light,
364-430: A fall from a high place, a cat reflexively twists its body and rights itself to land on its feet using its acute sense of balance and flexibility. This reflex is known as the cat righting reflex . A cat always rights itself in the same way during a fall, if it has enough time to do so, which is the case in falls of 90 cm (3.0 ft) or more. How cats are able to right themselves when falling has been investigated as
416-495: A fresh kill; some cats reject cold food (which would signal to the cat that the "prey" item is long dead and therefore possibly toxic or decomposing). To aid with navigation and sensation, cats have dozens of movable whiskers (vibrissae) over their body, especially their faces. These provide information on the width of gaps and on the location of objects in the dark, both by touching objects directly and by sensing air currents; they also trigger protective blink reflexes to protect
468-710: A large surface of olfactory mucosa , about 5.8 cm (0.90 in ) in area, which is about twice that of humans. Cats and many other animals have a Jacobson's organ in their mouths that is used in the behavioral process of flehmening . It allows them to sense certain aromas in a way that humans cannot. Cats are sensitive to pheromones such as 3-mercapto-3-methylbutan-1-ol , which they use to communicate through urine spraying and marking with scent glands . Many cats also respond strongly to plants that contain nepetalactone , especially catnip , as they can detect that substance at less than one part per billion. About 70–80% of cats are affected by nepetalactone. This response
520-443: A number of primitive characteristics. Nearly all have a relatively rigid lower jaw with a coronoid element, as well as a vestigial pelvic girdle with hind limbs that are partially visible as a pair of spurs , one on either side of the vent . In males, these anal spurs are larger and more conspicuous than in females. A long row of palatal teeth is present, and most species have a functional left lung that can be up to 75% as large as
572-437: A thicker protective layer of enamel , a less damaging saliva, less retention of food particles between teeth, and a diet mostly devoid of sugar. Nonetheless, they are subject to occasional tooth loss and infection. Cats have protractible and retractable claws. In their normal, relaxed position, the claws are sheathed with the skin and fur around the paw's toe pads. This keeps the claws sharp by preventing wear from contact with
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#1732851836524624-514: A variable number of caudal vertebrae in the tail (humans have only three to five vestigial caudal vertebrae, fused into an internal coccyx ). The extra lumbar and thoracic vertebrae account for the cat's spinal mobility and flexibility. Attached to the spine are 13 ribs, the shoulder, and the pelvis . Unlike human arms, cat forelimbs are attached to the shoulder by free-floating clavicle bones which allow them to pass their body through any space into which they can fit their head. The cat skull
676-511: Is digitigrade . It walks on the toes, with the bones of the feet making up the lower part of the visible leg. Unlike most mammals, it uses a "pacing" gait and moves both legs on one side of the body before the legs on the other side. It registers directly by placing each hind paw close to the track of the corresponding fore paw, minimizing noise and visible tracks. This also provides sure footing for hind paws when navigating rough terrain. As it speeds up from walking to trotting, its gait changes to
728-489: Is proximal to the other claws. More proximally is a protrusion which appears to be a sixth "finger". This special feature of the front paws on the inside of the wrists has no function in normal walking but is thought to be an antiskidding device used while jumping. Some cat breeds are prone to having extra digits (" polydactyly "). Polydactylous cats occur along North America's northeast coast and in Great Britain. The cat
780-489: Is a social species , but a solitary hunter and a crepuscular predator . Cat communication includes vocalizations—including meowing , purring , trilling, hissing , growling , and grunting —as well as body language . It can hear sounds too faint or too high in frequency for human ears , such as those made by small mammals . It secretes and perceives pheromones . Female domestic cats can have kittens from spring to late autumn in temperate zones and throughout
832-562: Is also possible, producing hybrids such as the Kellas cat in Scotland . Development of cat breeds started in the mid 19th century. An analysis of the domestic cat genome revealed that the ancestral wildcat genome was significantly altered in the process of domestication, as specific mutations were selected to develop cat breeds. Most breeds are founded on random-bred domestic cats. Genetic diversity of these breeds varies between regions, and
884-669: Is also produced by other plants, such as silver vine ( Actinidia polygama ) and the herb valerian ; it may be caused by the smell of these plants mimicking a pheromone and stimulating cats' social or sexual behaviors. Cats have relatively few taste buds compared to humans (470 or so, compared to more than 9,000 on the human tongue). Domestic and wild cats share a taste receptor gene mutation that keeps their sweet taste buds from binding to sugary molecules, leaving them with no ability to taste sweetness . They, however, possess taste bud receptors specialized for acids , amino acids like protein, and bitter tastes. Their taste buds possess
936-453: Is attested from the 16th century and may have been introduced from Dutch poes or from Low German puuskatte , related to Swedish kattepus , or Norwegian pus , pusekatt . Similar forms exist in Lithuanian puižė and Irish puisín or puiscín . The etymology of this word is unknown, but it may have arisen from a sound used to attract a cat. A male cat
988-400: Is called a tom or tomcat (or a gib , if neutered ). A female is called a queen (or sometimes a molly , if spayed ). A juvenile cat is referred to as a kitten . In Early Modern English , the word kitten was interchangeable with the now-obsolete word catling . A group of cats can be referred to as a clowder , a glaring , or a colony . The scientific name Felis catus
1040-463: Is enhanced by its large movable outer ears, the pinnae , which amplify sounds and help detect the location of a noise. It can detect ultrasound , which enables it to detect ultrasonic calls made by rodent prey. Recent research has shown that cats have socio-spatial cognitive abilities to create mental maps of owners' locations based on hearing owners' voices. Cats have an acute sense of smell, due in part to their well-developed olfactory bulb and
1092-565: Is in contrast to the pythons , which lay eggs ( oviparous ). Type genus = Boa – Gray, 1825 Pythons were historically classified as a subfamily of Boidae (called Pythoninae), but it was later determined that they are not closely related to boas despite having superficial similarities. Almost all of the non-boine boids are frequently elevated to their own full families: Calabariidae/inae, Candoiidae/inae, Charinidae/inae, Erycidae/inae, Sanziniidae/inae, and Ungaliophiidae/inae. The taxonomy of boid snakes has been long debated, and ultimately
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#17328518365241144-714: Is lowest in purebred populations, which show more than 20 deleterious genetic disorders . The domestic cat has a smaller skull and shorter bones than the European wildcat . It averages about 46 cm (18 in) in head-to-body length and 23–25 cm (9.1–9.8 in) in height, with about 30 cm (12 in) long tails. Males are larger than females. Adult domestic cats typically weigh 4–5 kg (8.8–11.0 lb). Cats have seven cervical vertebrae (as do most mammals ); 13 thoracic vertebrae (humans have 12); seven lumbar vertebrae (humans have five); three sacral vertebrae (as do most mammals, but humans have five); and
1196-482: Is unusual among mammals in having very large eye sockets and a powerful specialized jaw. Within the jaw, cats have teeth adapted for killing prey and tearing meat. When it overpowers its prey, a cat delivers a lethal neck bite with its two long canine teeth , inserting them between two of the prey's vertebrae and severing its spinal cord , causing irreversible paralysis and death. Compared to other felines, domestic cats have narrowly spaced canine teeth relative to
1248-557: The Arabian Peninsula , Central and Southwestern Asia, India and Sri Lanka , Indonesian islands ( Moluccas , West Papua , Talaud , Sulawesi ) and Papua New Guinea through Melanesia and Samoa . Prey is killed by constriction ; after an animal has been grasped to restrain it, a number of coils are hastily wrapped around it. Then, by applying and maintaining sufficient pressure, the snake prevents its prey from inhaling, so that it eventually succumbs to asphyxiation . Recently,
1300-644: The New World and pythons in the Old World . While this is true of boine boas , other boid species are present in Africa, much of southern Eurasia, Madagascar , New Guinea , and the Solomon Islands , so this is not accurate. However, they seem more abundant in evolutionarily isolated areas. South America was isolated until a few million years ago, with a fauna that included marsupials and other distinctive mammals . With
1352-531: The domestication of the cat occurred in the Near East around 7500 BC . It is commonly kept as a pet and farm cat , but also ranges freely as a feral cat avoiding human contact. Valued by humans for companionship and its ability to kill vermin , the cat's retractable claws are adapted to killing small prey like mice and rats . It has a strong, flexible body, quick reflexes , and sharp teeth, and its night vision and sense of smell are well developed. It
1404-481: The " falling cat problem ". The cat family (Felidae) can pass down many colors and patterns to their offspring. The domestic cat genes MC1R and ASIP allow color variety in their coats. The feline ASIP gene consists of three coding exons. Three novel microsatellite markers linked to ASIP were isolated from a domestic cat BAC clone containing this gene to perform linkage analysis on 89 domestic cats segregated for melanism . The domestic cat family demonstrated
1456-682: The beginning of the 1st century AD. By the end of the Western Roman Empire in the 5th century, the Egyptian domestic cat lineage had arrived in a Baltic Sea port in northern Germany . The leopard cat ( Prionailurus bengalensis ) was tamed independently in China around 5500 BC. This line of partially domesticated cats leaves no trace in the domestic cat populations of today. During domestication, cats have undergone only minor changes in anatomy and behavior, and they are still capable of surviving in
1508-609: The cat and other wild mammals to the island from the Middle Eastern mainland. Scientists therefore assume that African wildcats were attracted to early human settlements in the Fertile Crescent by rodents, in particular the house mouse ( Mus musculus ), and were tamed by Neolithic farmers. This mutual relationship between early farmers and tamed cats lasted thousands of years. As agricultural practices spread, so did tame and domesticated cats. Wildcats of Egypt contributed to
1560-472: The decision whether to assign a particular clade to a particular Linnaean rank (such as a superfamily , family , or subfamily ) is arbitrary. The subfamily Ungaliophiinae was formerly made up of four genera. Two of them ( Tropidophis and Trachyboa ) are actually more closely related to the American pipe snake ( Anilius scytale ) than to the boas, and are now placed in the family Tropidophiidae within
1612-560: The extinction of bird , mammal , and reptile species. As of 2017, the domestic cat was the second most popular pet in the United States, with 95.6 million cats owned and around 42 million households owning at least one cat. In the United Kingdom, 26% of adults have a cat, with an estimated population of 10.9 million pet cats as of 2020. As of 2021, there were an estimated 220 million owned and 480 million stray cats in
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1664-407: The eyes from damage. Outdoor cats are active both day and night, although they tend to be slightly more active at night. Domestic cats spend the majority of their time in the vicinity of their homes but can range many hundreds of meters from this central point. They establish territories that vary considerably in size, in one study ranging 7–28 ha (17–69 acres). The timing of cats' activity
1716-653: The formation of the Panamanian land bridge to North America about three million years ago, boines have migrated north as colubrids (and various Nearctic mammals) have migrated south, as part of the Great American Interchange . Most species are found in North, Central, and South America, as well as the Caribbean , while a few are found in southeastern Europe and Asia Minor , North, Central and East Africa, Madagascar ,
1768-463: The genus Boa by Kluge in 1991. These have now been transferred to the resurrected subfamily Sanziniinae . The genus Candoia has similarly been transferred to its own subfamily, Candoiinae. Cat The cat ( Felis catus ), also referred to as domestic cat or house cat , is a small domesticated carnivorous mammal. It is the only domesticated species of the family Felidae . Advances in archaeology and genetics have shown that
1820-483: The ground and allows for the silent stalking of prey. The claws on the forefeet are typically sharper than those on the hindfeet. Cats can voluntarily extend their claws on one or more paws. They may extend their claws in hunting or self-defense, climbing, kneading , or for extra traction on soft surfaces. Cats shed the outside layer of their claw sheaths when scratching rough surfaces. Most cats have five claws on their front paws and four on their rear paws. The dewclaw
1872-411: The high IMP and free l-Histidine contents of tuna, which produces a strong umami taste synergy that is highly preferred by cats". One of the researchers in this research has stated, "I think umami is as important for cats as sweet is for humans". Cats also have a distinct temperature preference for their food, preferring food with a temperature around 38 °C (100 °F) which is similar to that of
1924-439: The larger species do not crush their prey to death; in fact, prey is not even noticeably deformed before it is swallowed. The speed with which the coils are applied is impressive and the force they exert may be significant, but death is caused by suffocation, with the victim not being able to move its ribs to breathe while it is being constricted. Most species of boa are ovoviviparous , with females giving birth to live young. This
1976-404: The males. Six subfamilies comprising 15 genera and 54 species are currently recognized. Like the pythons , boas have elongated supratemporal bones. The quadrate bones are also elongated, but not as much, while both are capable of moving freely so when they swing sideways to their maximum extent, the distance between the hinges of the lower jaw is greatly increased. Both families share
2028-617: The maternal gene pool of the domestic cat at a later time. The earliest known evidence for the occurrence of the domestic cat in Greece dates to around 1200 BC. Greek, Phoenician , Carthaginian and Etruscan traders introduced domestic cats to southern Europe. By the 5th century BC, they were familiar animals around settlements in Magna Graecia and Etruria . During the Roman Empire , they were introduced to Corsica and Sardinia before
2080-580: The modern domesticated subspecies F. silvestris catus sampled worldwide was considered to have likely descended from the African wildcat ( F. lybica ), following results of phylogenetic research. In 2017, the IUCN Cat Classification Taskforce followed the recommendation of the ICZN in regarding the domestic cat as a distinct species, Felis catus . The domestic cat is a member of the Felidae,
2132-593: The pressures produced during constriction have been suggested as the cause of cardiac arrest by interfering with blood flow, but this hypothesis has not yet been confirmed. Larger specimens usually eat animals about the size of a domestic cat , but larger food items are not unknown: the diet of the green anaconda ( Eunectes murinus ) is known to include subadult tapirs . Prey is swallowed whole, and may take several days or even weeks to fully digest. Despite their intimidating size and muscular power, they are generally not dangerous to humans. Contrary to popular belief, even
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2184-487: The receptors needed to detect umami . However, these receptors contain molecular changes that make cat taste umami different from that of humans. In humans, they detect the amino acids glutamic acid and aspartic acid , but in cats, they instead detect inosine monophosphate and l-Histidine . These molecules are particularly enriched in tuna . This, it has been argued, is why cats find tuna so palatable : as put by researchers into cat taste, "the specific combination of
2236-474: The right lung. Boids are, however, distinguished from the pythons in that none has postfrontal bones or premaxillary teeth, and that they give birth to live young. When labial pits are present, these are located between the scales as opposed to on them. Also, their geographical distributions are almost entirely mutually exclusive. In the few areas where they do coexist, the tendency is for them to occupy different habitats. Formerly, boas were said to be found in
2288-518: The size of their jaw, which is an adaptation to their preferred prey of small rodents, which have small vertebrae. The premolar and first molar together compose the carnassial pair on each side of the mouth, which efficiently shears meat into small pieces, like a pair of scissors. These are vital in feeding, since cats' small molars cannot chew food effectively, and cats are largely incapable of mastication. Cats tend to have better teeth than most humans, with decay generally less likely because of
2340-798: The superfamily Amerophidia . The other two genera ( Ungaliophis and Exiliboa ) are the sister group of the Charina / Lichanura clade within Boidae. Boinae The Boinae are a purported subfamily of boas found in Central and South America , as well as the West Indies . In the Integrated Taxonomic Information System (ITIS), Boinae is considered an invalid synonym of Boidae . ) Type genus . The genera Acrantophis and Sanzinia were erroneously synonymized with
2392-862: The wild members of this genus evolved through sympatric or parapatric speciation , whereas the domestic cat evolved through artificial selection . The domestic cat and its closest wild ancestor are diploid and both possess 38 chromosomes and roughly 20,000 genes. Pantherinae other Felinae lineages Jungle cat ( F. chaus ) [REDACTED] Black-footed cat ( F. nigripes ) Sand cat ( F. margarita ) Chinese mountain cat ( F. bieti ) African wildcat ( F. lybica ) European wildcat ( F. silvestris ) [REDACTED] Domestic cat [REDACTED] Sand cat ( F. margarita ) Chinese mountain cat ( F. bieti ) European wildcat ( F. silvestris ) [REDACTED] Southern African wildcat (F. l. cafra) Asiatic wildcat (F. l. ornata) Near Eastern wildcat Domestic cat [REDACTED] It
2444-625: The wild. Several natural behaviors and characteristics of wildcats may have pre-adapted them for domestication as pets. These traits include their small size, social nature, obvious body language, love of play, and high intelligence. Since they practice rigorous grooming habits and have an instinctual drive to bury and hide their urine and feces, they are generally much less messy than other domesticated animals. Captive Leopardus cats may also display affectionate behavior toward humans but were not domesticated. House cats often mate with feral cats. Hybridization between domestic and other Felinae species
2496-537: The world. The origin of the English word cat , Old English catt , is thought to be the Late Latin word cattus , which was first used at the beginning of the 6th century. The Late Latin word may be derived from an unidentified African language . The Nubian word kaddîska 'wildcat' and Nobiin kadīs are possible sources or cognates. The forms might also have derived from an ancient Germanic word that
2548-403: The year in equatorial regions , with litter sizes often ranging from two to five kittens. Domestic cats are bred and shown at events as registered pedigreed cats , a hobby known as cat fancy . Animal population control of cats may be achieved by spaying and neutering , but their proliferation and the abandonment of pets has resulted in large numbers of feral cats worldwide, contributing to
2600-412: Was absorbed into Latin and then into Greek, Syriac, and Arabic. The word may be derived from Germanic and Northern European languages, and ultimately be borrowed from Uralic , cf. Northern Sámi gáđfi , 'female stoat ', and Hungarian hölgy , 'lady, female stoat'; from Proto-Uralic * käďwä , 'female (of a furred animal)'. The English puss , extended as pussy and pussycat ,
2652-512: Was long thought that the domestication of the cat began in ancient Egypt , where cats were venerated from around 3100 BC. However, the earliest known indication for the taming of an African wildcat was excavated close by a human Neolithic grave in Shillourokambos , southern Cyprus , dating to about 7500–7200 BC. Since there is no evidence of native mammalian fauna on Cyprus, the inhabitants of this Neolithic village most likely brought
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#17328518365242704-609: Was proposed by Carl Linnaeus in 1758 for a domestic cat. Felis catus domesticus was proposed by Johann Christian Polycarp Erxleben in 1777. Felis daemon proposed by Konstantin Satunin in 1904 was a black cat from the Transcaucasus , later identified as a domestic cat. In 2003, the International Commission on Zoological Nomenclature ruled that the domestic cat is a distinct species, namely Felis catus . In 2007,
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