The Wild boar (Sus scrofa) is a suid native to much of Eurasia and North Africa. The species is now one of the widest-ranging mammals in the world, as well as the most widespread suiform. It has been assessed as the least concern on the IUCN Red List due to its wide range, high numbers, and adaptability to a diversity of habitats. It has become an invasive species in part of its introduced range. The Wild boar has a long history of association with humans, having been the ancestor of most domestic pig breeds and a big-game animal for millennia.
The Wild boar is a bulky, massively built suid with short and relatively thin legs. The trunk is short and robust, while the hindquarters are comparatively underdeveloped. The region behind the shoulder blades rises into a hump and the neck is short and thick to the point of being nearly immobile. The animal's head is very large, taking up to one-third of the body's entire length. The structure of the head is well-suited for digging. The head acts as a plough, while the powerful neck muscles allow the animal to upturn considerable amounts of soil. The eyes are small and deep-set and the ears long and broad. The species has well-developed canine teeth, which protrude from the mouths of adult males. The medial hooves are larger and more elongated than the lateral ones and are capable of quick movements. The winter coat of the Wild boar consists of long, coarse bristles underlaid with short brown downy fur. Coat color varies with location and with age, with piglets having light brown or rusty-brown fur with pale bands extending from the flanks and back.
Wild boars are commonly found and abundant animals, occurring throughout the globe, except for Antarctica. The natural habitat of this species covers parts of Europe and Asia. Additionally, Wild boars have been introduced to South and North America. Currently, these animals are considered invaders throughout the southeastern United States and California. Preferred types of habitat are grassy savanna areas, wooded forests, agricultural areas, shrublands, and marshy swamplands. Overall, Wild boars live in areas with a constant source of water and dense vegetative cover to serve them as a refuge from predators.
As a nocturnal mammal, the Wild boar is active during the night, when it leaves its shelter to find food. This animal spends as much as 12 hours per day sleeping in a nest, constructed out of leaves. Females of this species exhibit social behavior, forming so-called "sounders" - loosely organized groups of 6-30 individuals. Each of these units is composed of breeding females and their offspring. Two or more groups may occasionally share the same area without mixing with each other. Male Wild boars tend to lead solitary life during most of the year. They socialize only in the reproductive season, during which they frequently occur near sounders as well as territories of other breeding males. The communication system of these animals includes vocalizations such as growls, which express aggression. They also use squealing calls, typically when excited or to display a friendly attitude.
As an omnivorous species, the Wild boar consumes food of both plant and animal origin. The diet of these mammals is generally composed of plants such as crops, fruits, nuts (mast), roots, and green plants, supplemented with bird eggs, carrion, small rodents, insects, and worms. Additionally, the Wild boar has been known to hunt on livestock such as small calves or lambs.
Wild boars exhibit a polygynous mating system, where each breeding male defends its mating rights. The winning male will mate with the females in a sounder. Breeding occurs year-round. The gestation period lasts for 108-120 days, yielding a litter of 4-6 piglets. Young are born in a nest, located among dense vegetation and constructed out of leaves, grass, and moss. During the first 2 weeks, the female is almost constantly with her young to protect them from potential predators. At about 2 months of age, young boars start coming out of the nest to feed. Independence is reached within 7 months. Male Wild boars are ready to breed at 2 years old, whereas females are reproductively mature at 1 year of age.
