Artiodactyls are a diverse group of mammals that includes deer, pigs, hippos, giraffes, and camels. These animals are characterized by having an even number of toes on each foot, typically two or four. Alternate terms used to describe artiodactyls include "even-toed ungulates" or "cloven-hoofed mammals." These synonyms for artiodactyls are based on the animals' distinctive foot structure. Another term that is sometimes used to describe artiodactyls is "ruminants," which refers to their four-chambered stomachs that are specialized for digesting fibrous plant material. Artiodactyls are an important group of mammals that play vital ecological roles across a range of habitats, from forests to grasslands to aquatic environments.