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83-505: O-Six (2006–2012), also known as 832F or "The 06 Female" , was a female gray wolf , whose death by hunting just outside the protected area of Yellowstone National Park stirred debate about the hunting and protection of wolves in Wyoming, Montana and Idaho. The bestselling book American Wolf focused on O-Six's life and on conservation policies in the Yellowstone region. O-Six (named after

166-552: A mated pair accompanied by their offspring. Offspring may leave to form their own packs on the onset of sexual maturity and in response to competition for food within the pack. Wolves are also territorial , and fights over territory are among the principal causes of mortality. The wolf is mainly a carnivore and feeds on large wild hooved mammals as well as smaller animals, livestock, carrion , and garbage. Single wolves or mated pairs typically have higher success rates in hunting than do large packs. Pathogens and parasites, notably

249-521: A taxonomic synonym for the dingo . Wozencraft referred to a 1999 mitochondrial DNA (mtDNA) study as one of the guides in forming his decision, and listed the 38 subspecies of C. lupus under the biological common name of "wolf", the nominate subspecies being the Eurasian wolf ( C. l. lupus ) based on the type specimen that Linnaeus studied in Sweden. Studies using paleogenomic techniques reveal that

332-654: A "greeting song". The group yip howl is emitted when two or more pack members reunite and may be the final act of a complex greeting ceremony. Contact calls include lone howls and group howls, as well as the previously mentioned group yip howls. The lone howl is the most iconic sound of the coyote and may serve the purpose of announcing the presence of a lone individual separated from its pack. Group howls are used as both substitute group yip howls and as responses to either lone howls, group howls, or group yip howls. Dog communication includes specific types of howls that have been identified in dogs, including: The vocal repertoire of

415-520: A broader snout, shorter ears, a shorter torso and a longer tail. It is slender and powerfully built, with a large, deeply descending rib cage , a sloping back, and a heavily muscled neck. The wolf's legs are moderately longer than those of other canids, which enables the animal to move swiftly, and to overcome the deep snow that covers most of its geographical range in winter, though more short-legged ecomorphs are found in some wolf populations. The ears are relatively small and triangular. The wolf's head

498-481: A den located away from the peripheral zone of their territories, where violent encounters with other packs are less likely to occur. Howling The long-distance howling of wolves and coyotes is one way in which canines communicate. Long-distance contact calls are common in Canidae , typically in the form of either barks (termed "pulse trains") or howls (termed "long acoustic streams"). Wolves howl to assemble

581-448: A family of eight wolves (two adults, juveniles, and yearlings), or sometimes two or three such families, with examples of exceptionally large packs consisting of up to 42 wolves being known. Cortisol levels in wolves rise significantly when a pack member dies, indicating the presence of stress. During times of prey abundance caused by calving or migration, different wolf packs may join together temporarily. Offspring typically stay in

664-433: A few times and then retreating from a perceived danger. Aggressive or self-assertive wolves are characterized by their slow and deliberate movements, high body posture and raised hackles , while submissive ones carry their bodies low, flatten their fur, and lower their ears and tail. Scent marking involves urine, feces, and preputial and anal gland scents. This is more effective at advertising territory than howling and

747-561: A kill are long, smooth sounds similar to the beginning of the cry of a great horned owl . When pursuing prey, they emit a higher pitched howl, vibrating on two notes. When closing in on their prey, they emit a combination of a short bark and a howl. When howling together, wolves harmonize rather than chorus on the same note, thus creating the illusion of there being more wolves than there actually are. Lone wolves typically avoid howling in areas where other packs are present. Wolves from different geographic locations may howl in different fashions:

830-666: A museum specimen of a wolf from southern China collected in 1963 showed a genome that was 12–14% admixed from this unknown canid. In North America, some coyotes and wolves show varying degrees of past genetic admixture . In more recent times, some male Italian wolves originated from dog ancestry, which indicates female wolves will breed with male dogs in the wild. In the Caucasus Mountains , ten percent of dogs including livestock guardian dogs , are first generation hybrids. Although mating between golden jackals and wolves has never been observed, evidence of jackal-wolf hybridization

913-749: A press release by the U.S. Department of Agriculture in 1921, the infamous Custer Wolf relied on coyotes to accompany him and warn him of danger. Though they fed from his kills, he never allowed them to approach him. Interactions have been observed in Eurasia between wolves and golden jackals, the latter's numbers being comparatively small in areas with high wolf densities. Wolves also kill red , Arctic and corsac foxes , usually in disputes over carcasses, sometimes eating them. Brown bears typically dominate wolf packs in disputes over carcasses, while wolf packs mostly prevail against bears when defending their den sites. Both species kill each other's young. Wolves eat

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996-661: A shorter torso and a longer tail. The wolf is nonetheless related closely enough to smaller Canis species, such as the coyote and the golden jackal , to produce fertile hybrids with them. The wolf's fur is usually mottled white, brown, grey, and black, although subspecies in the arctic region may be nearly all white. Of all members of the genus Canis , the wolf is most specialized for cooperative game hunting as demonstrated by its physical adaptations to tackling large prey, its more social nature , and its highly advanced expressive behaviour , including individual or group howling . It travels in nuclear families consisting of

1079-552: A staple of modern depictions of werewolves and other monstrous dogs, leading to their central position in media such as The Howling media franchise , the 2012 Korean film, Howling , and the 2015 British film, Howl . Howling by humans has historically been associated with wildness and madness. The howling of wolves has been described as "perhaps the most evocative sound of any wild creature", alternately beautiful and dismal, and consequently recordings of howling have sometimes been incorporated into music. Although wolves howling at

1162-409: A variety of arthropod exoparasites, including fleas , ticks , lice , and mites . The most harmful to wolves, particularly pups, is the mange mite ( Sarcoptes scabiei ), though they rarely develop full-blown mange , unlike foxes. Endoparasites known to infect wolves include: protozoans and helminths ( flukes , tapeworms , roundworms and thorny-headed worms ). Most fluke species reside in

1245-411: A weight of 69–79 kg (152–174 lb). The wolf has very dense and fluffy winter fur, with a short undercoat and long, coarse guard hairs . Most of the undercoat and some guard hairs are shed in spring and grow back in autumn. The longest hairs occur on the back, particularly on the front quarters and neck. Especially long hairs grow on the shoulders and almost form a crest on the upper part of

1328-471: Is difficult and ambiguous, with some authors choosing to include C. mosbachensis (which first appeared around 1.4 million years ago) as an early subspecies of C. lupus. Considerable morphological diversity existed among wolves by the Late Pleistocene . Many Late Pleistocene wolf populations had more robust skulls and teeth than modern wolves, often with a shortened snout , a pronounced development of

1411-521: Is dominated by wild medium-sized hoofed mammals and domestic species. The wolf depends on wild species, and if these are not readily available, as in Asia, the wolf is more reliant on domestic species. Across Eurasia, wolves prey mostly on moose , red deer , roe deer and wild boar . In North America, important range-wide prey are elk , moose, caribou , white-tailed deer and mule deer . Prior to their extirpation from North America, wild horses were among

1494-1203: Is itself thought to be derived from the Proto-Germanic * wulfaz . The Proto-Indo-European root * wĺ̥kʷos may also be the source of the Latin word for the animal lupus (* lúkʷos ). The name "grey wolf" refers to the greyish colour of the species. Since pre-Christian times, Germanic peoples such as the Anglo-Saxons took on wulf as a prefix or suffix in their names. Examples include Wulfhere ("Wolf Army"), Cynewulf ("Royal Wolf"), Cēnwulf ("Bold Wolf"), Wulfheard ("Wolf-hard"), Earnwulf ("Eagle Wolf"), Wulfstān ("Wolf Stone") Æðelwulf ("Noble Wolf"), Wolfhroc ("Wolf-Frock"), Wolfhetan ("Wolf Hide"), Scrutolf ("Garb Wolf"), Wolfgang ("Wolf Gait") and Wolfdregil ("Wolf Runner"). Grey wolf [REDACTED] Coyote [REDACTED] African wolf [REDACTED] Ethiopian wolf [REDACTED] Golden jackal [REDACTED] Dhole [REDACTED] African wild dog [REDACTED] Side-striped jackal [REDACTED] Black-backed jackal [REDACTED] In 1758,

1577-399: Is large and heavy, with a wide forehead, strong jaws and a long, blunt muzzle. The skull is 230–280 mm (9–11 in) in length and 130–150 mm (5–6 in) in width. The teeth are heavy and large, making them better suited to crushing bone than those of other canids, though they are not as specialized as those found in hyenas . Its molars have a flat chewing surface, but not to

1660-541: Is largely survivable in wolves, but can be lethal to pups. Bacterial diseases carried by wolves include: brucellosis , Lyme disease , leptospirosis , tularemia , bovine tuberculosis , listeriosis and anthrax . Although lyme disease can debilitate individual wolves, it does not appear to significantly affect wolf populations. Leptospirosis can be contracted through contact with infected prey or urine, and can cause fever , anorexia , vomiting, anemia , hematuria , icterus , and death. Wolves are often infested with

1743-696: Is most likely used mainly to induce vomiting to rid themselves of intestinal parasites or long guard hairs. They are known to eat the berries of mountain-ash , lily of the valley , bilberries , cowberries , European black nightshade , grain crops, and the shoots of reeds. In times of scarcity, wolves will readily eat carrion . In Eurasian areas with dense human activity, many wolf populations are forced to subsist largely on livestock and garbage. As prey in North America continue to occupy suitable habitats with low human density, North American wolves eat livestock and garbage only in dire circumstances. Cannibalism

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1826-562: Is not uncommon in wolves during harsh winters, when packs often attack weak or injured wolves and may eat the bodies of dead pack members. Wolves typically dominate other canid species in areas where they both occur. In North America, incidents of wolves killing coyotes are common, particularly in winter, when coyotes feed on wolf kills. Wolves may attack coyote den sites, digging out and killing their pups, though rarely eating them. There are no records of coyotes killing wolves, though coyotes may chase wolves if they outnumber them. According to

1909-656: Is now extirpated (locally extinct) from much of its range in Western Europe, the United States and Mexico, and completely in the British Isles and Japan. In modern times, the wolf occurs mostly in wilderness and remote areas. The wolf can be found between sea level and 3,000 m (9,800 ft). Wolves live in forests, inland wetlands , shrublands , grasslands (including Arctic tundra ), pastures , deserts, and rocky peaks on mountains. Habitat use by wolves depends on

1992-458: Is often used in combination with scratch marks. Wolves increase their rate of scent marking when they encounter the marks of wolves from other packs. Lone wolves will rarely mark, but newly bonded pairs will scent mark the most. These marks are generally left every 240 m (260 yd) throughout the territory on regular travelways and junctions. Such markers can last for two to three weeks, and are typically placed near rocks, boulders, trees, or

2075-689: Is similar, prompting early European explorers of the Americas to confuse the animals. One record from 1750 in Kaskaskia, Illinois , written by a local priest, noted that the "wolves" encountered there were smaller and less daring than European wolves. Another account from the early 1800s in Edwards County mentioned wolves howling at night, though these were likely coyotes. In coyotes, "bark howls" may serve as both long-distance threat vocalizations and alarm calls. The sound known as 'wow-oo-wow' has been described as

2158-595: Is usually constructed not more than 500 m (550 yd) away from a water source. It typically faces southwards where it can be better warmed by sunlight exposure, and the snow can thaw more quickly. Resting places, play areas for the pups, and food remains are commonly found around wolf dens. The odor of urine and rotting food emanating from the denning area often attracts scavenging birds like magpies and ravens . Though they mostly avoid areas within human sight, wolves have been known to nest near homes, paved roads and railways . During pregnancy, female wolves remain in

2241-435: Is usually founded by an unrelated dispersing male and female, travelling together in search of an area devoid of other hostile packs. Wolf packs rarely adopt other wolves into their fold and typically kill them. In the rare cases where other wolves are adopted, the adoptee is almost invariably an immature animal of one to three years old, and unlikely to compete for breeding rights with the mated pair. This usually occurs between

2324-594: The Eurasian lynx , which may feed on smaller prey where wolves are present and may be suppressed by large wolf populations. Wolves encounter cougars along portions of the Rocky Mountains and adjacent mountain ranges. Wolves and cougars typically avoid encountering each other by hunting at different elevations for different prey ( niche partitioning ). This is more difficult during winter. Wolves in packs usually dominate cougars and can steal their kills or even kill them, while one-to-one encounters tend to be dominated by

2407-688: The Moon . Wolf howls are generally indistinguishable from those of large dogs. Male wolves give voice through an octave , passing to a deep bass with a stress on " O ", while females produce a modulated nasal baritone with stress on " U ". Pups almost never howl, while yearling wolves produce howls ending in a series of dog-like yelps. Howling consists of a fundamental frequency that may lie between 150 and 780 Hz, and consists of up to 12 harmonically related overtones. The pitch usually remains constant or varies smoothly and may change direction as many as four or five times. Howls used for calling pack mates to

2490-462: The grey wolf or gray wolf , is a canine native to Eurasia and North America . More than thirty subspecies of Canis lupus have been recognized, including the dog and dingo , though grey wolves, as popularly understood, only comprise naturally-occurring wild subspecies. The wolf is the largest wild extant member of the family Canidae , and is further distinguished from other Canis species by its less pointed ears and muzzle, as well as

2573-506: The incubation period for rabies is eight to 21 days, and results in the host becoming agitated, deserting its pack, and travelling up to 80 km (50 mi) a day, thus increasing the risk of infecting other wolves. Although canine distemper is lethal in dogs, it has not been recorded to kill wolves, except in Canada and Alaska. The canine parvovirus, which causes death by dehydration , electrolyte imbalance , and endotoxic shock or sepsis ,

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2656-528: The rabies virus , may infect wolves. The global wild wolf population was estimated to be 300,000 in 2003 and is considered to be of Least Concern by the International Union for Conservation of Nature (IUCN). Wolves have a long history of interactions with humans, having been despised and hunted in most pastoral communities because of their attacks on livestock, while conversely being respected in some agrarian and hunter-gatherer societies. Although

2739-610: The temporalis muscle, and robust premolars . It is proposed that these features were specialized adaptations for the processing of carcass and bone associated with the hunting and scavenging of Pleistocene megafauna . Compared with modern wolves, some Pleistocene wolves showed an increase in tooth breakage similar to that seen in the extinct dire wolf . This suggests they either often processed carcasses, or that they competed with other carnivores and needed to consume their prey quickly. The frequency and location of tooth fractures in these wolves indicates they were habitual bone crackers like

2822-515: The werewolf . Virgil , in his poetic work Eclogues , wrote about a man called Moeris, who used herbs and poisons picked in his native Pontus to turn himself into a wolf. An examination of Virgil's work notes that "[t]he howling of wolves is portentous; it is cited among the baleful omens at the assassination of Julius Caesar and the advent of renewed civil strife". In prose , the Satyricon , written circa AD 60 by Gaius Petronius Arbiter , one of

2905-460: The 1995 reintroduction of wolves to the park . Leaving her birth pack to claim new territory, she established the Lamar Canyon pack as a three-year-old in 2010. The pack's territory in the easily accessible Lamar River Valley (named after Lucius Quintus Cincinnatus Lamar (II) ) allowed tourists and wolf researchers to observe and extensively document the activities and behaviours of the wolves. As

2988-606: The Egyptian Sinai Peninsula showed admixture with Middle Eastern grey wolves and dogs. There is evidence of gene flow between golden jackals and Middle Eastern wolves, less so with European and Asian wolves, and least with North American wolves. This indicates the golden jackal ancestry found in North American wolves may have occurred before the divergence of the Eurasian and North American wolves. The common ancestor of

3071-399: The Eurasian wolf is a mixture of ochreous (yellow to orange) and rusty ochreous (orange/red/brown) colours with light grey. The muzzle is pale ochreous grey, and the area of the lips, cheeks, chin, and throat is white. The top of the head, forehead, under and between the eyes, and between the eyes and ears is grey with a reddish film. The neck is ochreous. Long, black tips on the hairs along

3154-459: The Lamar Canyon pack was displaced by another wolf pack. Wandering into new territory, the remaining pack members, including O-Six, left the park, where no hunting is allowed, and appeared on private land to the east, near Crandall, Wyoming, during Wyoming's 2012 wolf hunting season. The allowed take in that season was eight wolves. She was shot by a hunter on December 6, 2012, the eighth wolf to be legally killed in Wyoming in 2012. The death of O-Six

3237-502: The Middle East, and Asia is estimated to be fairly recent at around 1,600 years ago. Among New World wolves, the Mexican wolf diverged around 5,400 years ago. In the distant past, there was gene flow between African wolves , golden jackals , and grey wolves. The African wolf is a descendant of a genetically admixed canid of 72% wolf and 28% Ethiopian wolf ancestry. One African wolf from

3320-509: The Swedish botanist and zoologist Carl Linnaeus published in his Systema Naturae the binomial nomenclature . Canis is the Latin word meaning " dog ", and under this genus he listed the doglike carnivores including domestic dogs, wolves, and jackals . He classified the domestic dog as Canis familiaris , and the wolf as Canis lupus . Linnaeus considered the dog to be a separate species from

3403-442: The abundance of prey, snow conditions, livestock densities, road densities, human presence and topography . Like all land mammals that are pack hunters , the wolf feeds predominantly on ungulates that can be divided into large size 240–650 kg (530–1,430 lb) and medium size 23–130 kg (51–287 lb), and have a body mass similar to that of the combined mass of the pack members. The wolf specializes in preying on

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3486-481: The age of the pack's pups. They tend to increase in size in areas with low prey populations, or when the pups reach the age of six months when they have the same nutritional needs as adults. Wolf packs travel constantly in search of prey, covering roughly 9% of their territory per day, on average 25 km/d (16 mi/d). The core of their territory is on average 35 km (14 sq mi) where they spend 50% of their time. Prey density tends to be much higher on

3569-414: The age of two years and sexually mature from the age of three years. The age of first breeding in wolves depends largely on environmental factors: when food is plentiful, or when wolf populations are heavily managed, wolves can rear pups at younger ages to better exploit abundant resources. Females are capable of producing pups every year, one litter annually being the average. Oestrus and rut begin in

3652-437: The back form a broad stripe, with black hair tips on the shoulders, upper chest and rear of the body. The sides of the body, tail, and outer limbs are a pale dirty ochreous colour, while the inner sides of the limbs, belly, and groin are white. Apart from those wolves which are pure white or black, these tones vary little across geographical areas, although the patterns of these colours vary between individuals. In North America,

3735-655: The brown bears they kill, while brown bears seem to eat only young wolves. Wolf interactions with American black bears are much rarer because of differences in habitat preferences. Wolves have been recorded on numerous occasions actively seeking out American black bears in their dens and killing them without eating them. Unlike brown bears, American black bears frequently lose against wolves in disputes over kills. Wolves also dominate and sometimes kill wolverines , and will chase off those that attempt to scavenge from their kills. Wolverines escape from wolves in caves or up trees. Wolves may interact and compete with felids , such as

3818-637: The cat, who likewise will kill wolves. Wolves more broadly affect cougar population dynamics and distribution by dominating territory and prey opportunities and disrupting the feline's behaviour. Wolf and Siberian tiger interactions are well-documented in the Russian Far East , where tigers significantly depress wolf numbers, sometimes to the point of localized extinction . In Israel, Palestine, Central Asia and India wolves may encounter striped hyenas , usually in disputes over carcasses. Striped hyenas feed extensively on wolf-killed carcasses in areas where

3901-424: The characters, Niceros, tells a story at a banquet about a friend who turned into a wolf (chs. 61–62). He describes the incident as follows, "When I look for my buddy I see he'd stripped and piled his clothes by the roadside... He pees in a circle round his clothes and then, just like that, turns into a wolf!... after he turned into a wolf he started howling and then ran off into the woods." Such depictions have become

3984-653: The coat colours of wolves follow Gloger's rule , wolves in the Canadian arctic being white and those in southern Canada, the U.S., and Mexico being predominantly grey. In some areas of the Rocky Mountains of Alberta and British Columbia, the coat colour is predominantly black, some being blue-grey and some with silver and black. Differences in coat colour between sexes is absent in Eurasia; females tend to have redder tones in North America. Black-coloured wolves in North America acquired their colour from wolf-dog admixture after

4067-464: The coyote and the wolf is admixed with a ghost population of an extinct unidentified canid. This canid was genetically close to the dhole and evolved after the divergence of the African hunting dog from the other canid species. The basal position of the coyote compared to the wolf has been proposed to be due to the coyote retaining more of the mitochondrial genome of this unidentified canid. Similarly,

4150-552: The day. Their main vocals consist of loud, deep, guttural growls or "howls". Howler monkeys are widely considered to be the loudest land animals. According to Guinness Book of World Records , their vocalizations can be heard clearly for 3 mi (4.8 km). The function of howling is thought to relate to intergroup spacing and territory protection, as well as possibly to mate-guarding. Human accounts of wolf behavior are typified by depictions of howling, and this has been incorporated into fictional and mythical representations, such as

4233-467: The dominant breeding female (" alpha female "), O-Six was one of the most visible and photographed wolves in Yellowstone and was described as a "rock star." She was famous for hunting and taking down elk by herself, which is extremely rare as wolves usually hunt in packs. After several years, O-Six was captured, fitted with a radio-tracking collar and released, gaining the collar number 832F. She produced three litters of pups with her mate, Wolf #755M, before

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4316-526: The extant wolf C. lupus from the earlier C. mosbachensis (which in turn descended from C. etruscus ) is widely accepted. Among the oldest fossils of the modern grey wolf is from Ponte Galeria in Italy, dating to 406,500 ± 2,400 years ago. Remains from Cripple Creek Sump in Alaska may be considerably older, around 1 million years old, though differentiating between the remains of modern wolves and C. mosbachensis

4399-476: The fear of wolves exists in many human societies, the majority of recorded attacks on people have been attributed to animals suffering from rabies . Wolf attacks on humans are rare because wolves are relatively few, live away from people, and have developed a fear of humans because of their experiences with hunters, farmers, ranchers, and shepherds. The English "wolf" stems from the Old English wulf , which

4482-458: The first arrival of dogs across the Bering Strait 12,000 to 14,000 years ago. Research into the inheritance of white colour from dogs into wolves has yet to be undertaken. Wolves occur across Eurasia and North America. However, deliberate human persecution because of livestock predation and fear of attacks on humans has reduced the wolf's range to about one-third of its historic range; the wolf

4565-590: The fox, though substantial, includes fewer howling behaviors. At the age of about one month, fox kits can emit a high-pitched howl as an explosive call intended to be threatening to intruders or other cubs. Outside of canines, the howler monkey is also noted for behavior characterized as howling. As their name suggests, vocal communication forms an important part of their social behavior . They each have an enlarged basihyal or hyoid bone , which helps them make their loud vocalizations. Group males generally call at dawn and dusk, as well as interspersed times throughout

4648-834: The hind feet are 220–250 mm ( 8 + 5 ⁄ 8 – 9 + 7 ⁄ 8  in). The size and weight of the modern wolf increases proportionally with latitude in accordance with Bergmann's rule . The mean body mass of the wolf is 40 kg (88 lb), the smallest specimen recorded at 12 kg (26 lb) and the largest at 79.4 kg (175 lb). On average, European wolves weigh 38.5 kg (85 lb), North American wolves 36 kg (79 lb), and Indian and Arabian wolves 25 kg (55 lb). Females in any given wolf population typically weigh 2.3–4.5 kg (5–10 lb) less than males. Wolves weighing over 54 kg (119 lb) are uncommon, though exceptionally large individuals have been recorded in Alaska and Canada. In central Russia, exceptionally large males can reach

4731-441: The howls of European wolves are much more protracted and melodious than those of North American wolves, whose howls are louder and have a stronger emphasis on the first syllable. One variation of the howl is accompanied by a high pitched whine, which precedes a lunging attack. Scent marking is more effective at advertising territory than howling and is often used in combination with scratch marks. The howling of wolves and coyotes

4814-474: The lineage that led to dogs from other Old World wolves around 11,100–12,300 years ago. An extinct Late Pleistocene wolf may have been the ancestor of the dog, with the dog's similarity to the extant wolf being the result of genetic admixture between the two. The dingo, Basenji , Tibetan Mastiff and Chinese indigenous breeds are basal members of the domestic dog clade. The divergence time for wolves in Europe,

4897-424: The middle of the back is 60–70 mm ( 2 + 3 ⁄ 8 – 2 + 3 ⁄ 4  in), and the guard hairs on the shoulders generally do not exceed 90 mm ( 3 + 1 ⁄ 2  in), but can reach 110–130 mm ( 4 + 3 ⁄ 8 – 5 + 1 ⁄ 8  in). A wolf's coat colour is determined by its guard hairs. Wolves usually have some hairs that are white, brown, grey and black. The coat of

4980-518: The modern spotted hyena . Genomic studies suggest modern wolves and dogs descend from a common ancestral wolf population. A 2021 study found that the Himalayan wolf and the Indian plains wolf are part of a lineage that is basal to other wolves and split from them 200,000 years ago. Other wolves appear to share most of their common ancestry much more recently, within the last 23,000 years (around

5063-576: The modern wolf and the dog are sister taxa , as modern wolves are not closely related to the population of wolves that was first domesticated . In 2019, a workshop hosted by the IUCN /Species Survival Commission's Canid Specialist Group considered the New Guinea singing dog and the dingo to be feral Canis familiaris , and therefore should not be assessed for the IUCN Red List . The phylogenetic descent of

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5146-400: The months of February and May. Adoptee males may mate with an available pack female and then form their own pack. In some cases, a lone wolf is adopted into a pack to replace a deceased breeder. Wolves are territorial and generally establish territories far larger than they require to survive assuring a steady supply of prey. Territory size depends largely on the amount of prey available and

5229-958: The most frequently consumed prey of North American wolves. Wolves can digest their meal in a few hours and can feed several times in one day, making quick use of large quantities of meat. A well-fed wolf stores fat under the skin, around the heart, intestines, kidneys, and bone marrow, particularly during the autumn and winter. Nonetheless, wolves are not fussy eaters. Smaller-sized animals that may supplement their diet include rodents , hares , insectivores and smaller carnivores. They frequently eat waterfowl and their eggs. When such foods are insufficient, they prey on lizards , snakes , frogs , and large insects when available. Wolves in some areas may consume fish and even marine life. Wolves also consume some plant material. In Europe, they eat apples, pears, figs , melons, berries and cherries . In North America, wolves eat blueberries and raspberries . They also eat grass, which may provide some vitamins, but

5312-417: The neck. The hairs on the cheeks are elongated and form tufts. The ears are covered in short hairs and project from the fur. Short, elastic and closely adjacent hairs are present on the limbs from the elbows down to the calcaneal tendons . The winter fur is highly resistant to the cold. Wolves in northern climates can rest comfortably in open areas at −40 °C (−40 °F) by placing their muzzles between

5395-478: The number of worms and the age of the host. The wolf is a social animal . Its populations consist of packs and lone wolves, most lone wolves being temporarily alone while they disperse from packs to form their own or join another one. The wolf's basic social unit is the nuclear family consisting of a mated pair accompanied by their offspring. The average pack size in North America is eight wolves and 5.5 in Europe. The average pack across Eurasia consists of

5478-451: The pack for 10–54 months before dispersing. Triggers for dispersal include the onset of sexual maturity and competition within the pack for food. The distance travelled by dispersing wolves varies widely; some stay in the vicinity of the parental group, while other individuals may travel great distances of upwards of 206 km (128 mi), 390 km (240 mi), and 670 km (420 mi) from their natal (birth) packs. A new pack

5561-423: The pack usually before and after hunts, to pass on an alarm particularly at a den site, to locate each other during a storm, while crossing unfamiliar territory, and to communicate across great distances. Under certain conditions, wolf howls can be heard over areas of up to 130 km (50 sq mi). The phases of the moon have no effect on wolf vocalization, and despite popular belief, wolves do not howl at

5644-459: The pack usually before and after hunts, to pass on an alarm particularly at a den site, to locate each other during a storm, while crossing unfamiliar territory, and to communicate across great distances. Wolf howls can under certain conditions be heard over areas of up to 130 km (50 sq mi). Other vocalizations include growls , barks and whines. Wolves do not bark as loudly or continuously as dogs do in confrontations, rather barking

5727-466: The pads come in contact with ice and snow. In warm climates, the fur is coarser and scarcer than in northern wolves. Female wolves tend to have smoother furred limbs than males and generally develop the smoothest overall coats as they age. Older wolves generally have more white hairs on the tip of the tail, along the nose, and on the forehead. Winter fur is retained longest by lactating females, although with some hair loss around their teats. Hair length on

5810-468: The peak and the end of the Last Glacial Maximum ), originating from Siberia or Beringia . While some sources have suggested that this was a consequence of a population bottleneck , other studies have suggested that this a result of gene flow homogenising ancestry. A 2016 genomic study suggests that Old World and New World wolves split around 12,500 years ago followed by the divergence of

5893-562: The principal causes of wolf mortality, one study concluding that 14–65% of wolf deaths in Minnesota and the Denali National Park and Preserve were due to other wolves. Wolves communicate using vocalizations, body postures, scent, touch, and taste. The phases of the moon have no effect on wolf vocalization, and despite popular belief, wolves do not howl at the Moon. Wolves howl to assemble

5976-410: The rear legs and covering their faces with their tail. Wolf fur provides better insulation than dog fur and does not collect ice when warm breath is condensed against it. In cold climates, the wolf can reduce the flow of blood near its skin to conserve body heat. The warmth of the foot pads is regulated independently from the rest of the body and is maintained at just above tissue-freezing point where

6059-474: The same extent as the coyote, whose diet contains more vegetable matter. Females tend to have narrower muzzles and foreheads, thinner necks, slightly shorter legs, and less massive shoulders than males. Adult wolves measure 105–160 cm (41–63 in) in length and 80–85 cm (31–33 in) at shoulder height. The tail measures 29–50 cm (11–20 in) in length, the ears 90–110 mm ( 3 + 1 ⁄ 2 – 4 + 3 ⁄ 8  in) in height, and

6142-552: The second half of winter and lasts for two weeks. Dens are usually constructed for pups during the summer period. When building dens, females make use of natural shelters like fissures in rocks, cliffs overhanging riverbanks and holes thickly covered by vegetation. Sometimes, the den is the appropriated burrow of smaller animals such as foxes, badgers or marmots. An appropriated den is often widened and partly remade. On rare occasions, female wolves dig burrows themselves, which are usually small and short with one to three openings. The den

6225-433: The skeletons of large animals. Raised leg urination is considered to be one of the most important forms of scent communication in the wolf, making up 60–80% of all scent marks observed. Wolves are monogamous , mated pairs usually remaining together for life. Should one of the pair die, another mate is found quickly. With wolves in the wild, inbreeding does not occur where outbreeding is possible. Wolves become mature at

6308-551: The territory's periphery. Wolves tend to avoid hunting on the fringes of their range to avoid fatal confrontations with neighbouring packs. The smallest territory on record was held by a pack of six wolves in northeastern Minnesota, which occupied an estimated 33 km (13 sq mi), while the largest was held by an Alaskan pack of ten wolves encompassing 6,272 km (2,422 sq mi). Wolf packs are typically settled, and usually leave their accustomed ranges only during severe food shortages. Territorial fights are among

6391-472: The two species interact. One-to-one, hyenas dominate wolves, and may prey on them, but wolf packs can drive off single or outnumbered hyenas. There is at least one case in Israel of a hyena associating and cooperating with a wolf pack. Viral diseases carried by wolves include: rabies , canine distemper , canine parvovirus , infectious canine hepatitis , papillomatosis , and canine coronavirus . In wolves,

6474-404: The vulnerable individuals of large prey, with a pack of 15 able to bring down an adult moose . The variation in diet between wolves living on different continents is based on the variety of hoofed mammals and of available smaller and domesticated prey. In North America, the wolf's diet is dominated by wild large hoofed mammals (ungulates) and medium-sized mammals. In Asia and Europe, their diet

6557-531: The wolf because of its "cauda recurvata" (upturning tail) which is not found in any other canid . In the third edition of Mammal Species of the World published in 2005, the mammalogist W. Christopher Wozencraft listed under C. lupus 36 wild subspecies, and proposed two additional subspecies: familiaris (Linnaeus, 1758) and dingo (Meyer, 1793). Wozencraft included hallstromi —the New Guinea singing dog —as

6640-468: The wolf's intestines. Tapeworms are commonly found in wolves, which they get though their prey, and generally cause little harm in wolves, though this depends on the number and size of the parasites, and the sensitivity of the host. Symptoms often include constipation , toxic and allergic reactions , irritation of the intestinal mucosa , and malnutrition . Wolves can carry over 30 roundworm species, though most roundworm infections appear benign, depending on

6723-547: The year of her birth). was for several years [2010 - 2012] the dominant breeding female of the Lamar Canyon pack in Yellowstone National Park . Born in 2006 in the Agate Creek pack to Agate Creek Wolves #113M (born a Chief Joseph Wolf in 1997) and Wolf #472F (born a Druid Peak wolf in 2000), she was principally known by the year of her birth. She was a member of the fourth generation of wolves born in Yellowstone after

6806-523: Was discovered through mitochondrial DNA analysis of jackals living in the Caucasus Mountains and in Bulgaria. In 2021, a genetic study found that the dog's similarity to the extant grey wolf was the result of substantial dog-into-wolf gene flow , with little evidence of the reverse. The wolf is the largest extant member of the family Canidae , and is further distinguished from coyotes and jackals by

6889-678: Was immediately reported in the New York Times , leading to extensive coverage of O-Six and wolf-hunting policies surrounding Yellowstone. Following the publication of the bestselling book American Wolf by Nate Blakeslee in 2017, which focused on O-Six's life, O-Six received additional media coverage, and was the subject of a National Geographic documentary. More coverage followed the shooting of O-Six's daughter 926F in Montana in 2018. Gray wolf See Subspecies of Canis lupus The wolf ( Canis lupus ; pl. : wolves ), also known as

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