Wild boar, also known as wild pig, (Sus scrofa) is a species of the pig genus Sus, part of the biological family Suidae. The species includes many subspecies. It is the wild ancestor of the domestic pig, an animal with which it freely hybridises. Wild boar are native across much of Northern and Central Europe, the Mediterranean Region (including North Africa's Atlas Mountains) and much of Asia as far south as Indonesia. Populations have also been artificially introduced in some parts of the world, most notably the Americas and Australasia, principally for hunting. Elsewhere, populations have also become established after escapes of wild boar from captivity.
The term boar is used to denote an adult male of certain species — including, confusingly, domestic pigs. However, for wild boar, it applies to the whole species, including, for example, "wild boar sow" or "wild boar piglet".
Wild boar are also known by various names, including wild hogs or simply boars. In North America they are more commonly referred to as razorbacks or European boars.
The body of the wild boar is compact; the head is large, the legs relatively short. The fur consists of stiff bristles and usually finer fur. The colour usually varies from dark grey to black or brown, but there are great regional differences in colour; even whitish animals are known from central Asia. During winter the fur is much denser.
Adult boars measure 90–200 cm (35–79 in) in length, not counting a tail of 15–40 cm (5.9–16 in), and have a shoulder height of 55–110 cm (22–43 in). As a whole, their average weight is 50–90 kg (110–200 pounds), though boars show a great deal of weight variation within their geographical ranges. In central Italy, their weight usually ranges from 80 to 100 kg (180 to 220 lb) while boars shot in Tuscany have been recorded to weigh up to 150 kg (331 lb). An unusually large French specimen shot in Negremont forest in Ardenne in 1999 weighed 227 kg (550 lb). Carpathian boars have been recorded to reach weights of 200 kg (441 lb). Romanian and Russian boars can reach weights of 300 kg (661 lb), while unconfirmed giants reported in early Russian hunting journals have reportedly weighed up to 320 kg (710 lb). Generally speaking, native Eurasian boars follow Bergmann's rule, with smaller boars nearer the tropics and larger, smaller-eared boars in the North of their range. Mature sows from Southeast Asia and southern India may weigh as little as 44 kg (97 lb).
Adult males develop tusks, continuously growing teeth that protrude from the mouth, from their upper and lower canine teeth. These serve as weapons and tools. The upper tusks are bent upwards in males, and are regularly ground against the lower ones to produce sharp edges. The tusks normally measure about 6 cm (2.4 in), in exceptional cases even 12 cm (4.7 in). Females also have sharp canines, but they are smaller, and not protruding like the males' tusks.
Wild boar piglets are coloured differently from adults, having marbled chocolate and cream stripes lengthwise over their bodies. The stripes fade by the time the piglet is about 6 months old, when the animal takes on the adult's grizzled grey or brown colour (see photo in Reproduction section to compare adult and juvenile colouring).
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