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The common warthog (Phacochoerus africanus) is a wild member of the pig family (Suidae) found in grassland, savanna, and woodland in sub-Saharan Africa. In the past, it was commonly treated as a subspecies of P. aethiopicus, but today that scientific name is restricted to the desert warthog of northern Kenya, Somalia, and eastern Ethiopia.
The common warthog is a medium-sized species, with a head-and-body length ranging from 0.9 to 1.5 m (3.0 to 4.9 ft), and shoulder height from 63.5 to 85 cm (25.0 to 33.5 in). Females, at 45 to 75 kg (99 to 165 lb), are typically a bit smaller and lighter in weight than males, at 60 to 150 kg (130 to 330 lb). A warthog is identifiable by the two pairs of tusks protruding from the mouth and curving upwards. The lower pair, which is far shorter than the upper pair, becomes razor-sharp by rubbing against the upper pair every time the mouth is opened and closed. The upper canine teeth can grow to 25.5 cm (10.0 in) long and have a wide elliptical cross section, being about 4.5 cm (1.8 in) deep and 2.5 cm (0.98 in) wide. A tusk will curve 90° or more from the root, and will not lie flat on a table, as it curves somewhat backwards as it grows. The tusks are used for digging, for combat with other hogs, and in defense against predators – the lower set can inflict severe wounds.
Common warthog ivory is taken from the constantly growing canine teeth. The tusks, particularly the upper set, work in much the same way as elephant tusks with all designs scaled down. Tusks are carved predominantly for the tourist trade in east and southern Africa.
The head of the common warthog is large, with a mane down the spine to the middle of the back.Sparse hair covers the body. Its color is usually black or brown. Tails are long and end with a tuft of hair. Common warthogs do not have subcutaneous fat and the coat is sparse, making them susceptible to extreme environmental temperatures.
The common warthog is the only pig species that has adapted to grazing and savanna habitats. Its diet is omnivorous, composed of grasses, roots, berries and other fruits, bark, fungi, insects, eggs and carrion.The diet is seasonably variable, depending on availability of different food items. During the wet seasons, warthogs graze on short perennial grasses. During the dry seasons, they subsist on bulbs, rhizomes, and nutritious roots. Warthogs are powerful diggers, using both their snouts and feet. Whilst feeding, they often bend their front feet backwards and move around on the wrists.Calloused pads that protect the wrists during such movement form quite early in the development of the fetus. Although they can dig their own burrows, they commonly occupy abandoned burrows of aardvarks and other animals. The common warthog commonly reverses into burrows, with its head facing the opening and ready to burst out if necessary. Common warthogs will wallow in mud to cope with high temperatures and huddle together to cope with low temperatures.
Although capable of fighting (males aggressively fight each other during mating season), the common warthog's primary defense is to flee by means of fast sprinting. The common warthog's main predators are humans, lions, leopards, cheetahs, crocodiles, wild dogs and hyenas. Birds of prey such as Verreaux's eagle owls and martial eagles sometimes prey on piglets. However, if a female common warthog has any piglets, she will defend them very aggressively. On occasion, common warthogs have been observed charging and even wounding large predators. Common warthogs have also been observed allowing banded mongooses and vervet monkeys to groom them to remove ticks.
Social Behavior And Reproduction
Common warthogs are not territorial, but instead occupy a home range.[Common warthogs live in groups called sounders. Females live in sounders with their young and with other females.Females tend to stay in their natal groups, while males leave, but stay within the home range.Subadult males associate in bachelor groups, but live alone when they become adults. Adult males only join sounders with estrous females. Warthogs have two facial glands: the tusk gland and the sebaceous gland. Common warthogs of both sexes begin to mark around six to seven months old.Males tend to mark more than females.They mark sleeping and feeding areas and waterholes.Common warthogs use tusk marking for courtship, for antagonistic behaviors, and to establish status.