Canidae is the biological family of mammals that includes the 34 living species of wolves, foxes, jackals, coyotes, and domestic dogs. Wild canids are found on every continent except Antarctica, and inhabit a wide range of different habitats, including grassland, forests, mountains, and deserts. Almost all canids are social animals and live together in groups. They are predators and carnivores. The dog (Canis lupus familiaris) may have been the first animal to be domesticated. For more than 12000 years it has lived with humans as a hunting companion, protector, object of scorn or adoration, and friend. The dog has evolved from the grey wolf into more than 400 distinct breeds.