A pig is any of the animals in the genus Sus, within the even-toed ungulate family Suidae. Pigs include domestic pigs and their ancestor, the common Eurasian wild boar (Sus scrofa), along with other species. Pigs, like all suids, are native to the Eurasian and African continents, ranging from Europe to Pacific islands.

A typical pig has a large head with a long snout that is strengthened by a special prenasal bone and by a disk of cartilage at the tip. The snout is used to dig into the soil to find food and is a very acute sense organ. There are four hoofed toes on each foot, with the two larger central toes bearing most of the weight, but the outer two also being used in soft ground.

It is physically impossible for pigs to look up straight to the sky. It’s the anatomy of their neck muscles and the spine that limits the movement of their head and restricts them to look totally upwards. Even to look at a treetop, a pig has to take one or more steps back while lifting its head to see directly above it.

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