The Suidae family: Ancient artiodactyls with a unique snout and complex social lives

Nature · Published 3 October 2026 Swipe more like this →

In short: Commonly known as pigs, hogs, or swine, the Suidae family represents a group of adaptable mammals native to the Old World. From the tiny pygmy hog to the massive giant forest hog, these intelligent creatures possess distinct anatomical features, including a specialized nose bone and a unique, non-ruminant digestive system.

Suidae are members of the order Artiodactyla and are considered the living descendants most similar to the group's ancestral form. Unlike their ruminant relatives, suids possess a simple stomach and retain four hooves on each foot, though they walk only on the middle two digits. Their evolutionary history dates back to the Oligocene epoch in Asia, with descendants expanding into Europe during the Miocene. Today, there are 18 recognized extant species, ranging from the genus Sus to babirusas and warthogs.

Physically, suids are defined by large heads, short necks, and a distinctive snout featuring a neomorphic bone called the rostral, which assists in foraging. Their dental structure is equally specialized; they retain upper incisors—a trait lost in most other artiodactyls—and possess enlarged canine tusks used for rooting and defense. Their diet is remarkably varied, spanning from strict herbivory to omnivorous consumption of insects, worms, and occasionally small vertebrates like frogs or mice.

Socially, suids exhibit clear behavioral patterns. Adult females, or sows, travel in groups known as sounders with their young, while boars are typically solitary or live in small bachelor groups. While males are not strictly territorial, they engage in conflict during mating seasons. Sexual maturity is reached at 18 months, though males often do not successfully mate in the wild until they reach their full physical size at approximately four years of age. This dimorphism is pronounced, with males being significantly larger than females and sporting more prominent tusks.

These animals are highly vocal, using a series of grunts and squeals to communicate, supported by a well-developed sense of hearing and an acute sense of smell. Their reproductive strategy involves litters ranging from one to twelve offspring, which are typically weaned at three months. By maintaining a blend of primitive anatomical traits and high behavioral adaptability, the Suidae family has successfully persisted across Afro-Eurasia for millions of years.

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