Camels have long been domesticated and, as livestock, they provide food (milk and meat) and textiles (fiber and felt from hair). As working animals, camels—which are uniquely suited to their desert habitats—are a vital means of transport for passengers and cargo. There are three surviving species of camel. The one-humped dromedary makes up 94% of the world's camel population, and the two-humped Bactrian camel makes up the remainder. The Wild Bactrian camel is a separate species and is now critically endangered.
The word camel is derived via Latin: camelus and Greek: κάμηλος (kamēlos) from Hebrew or Phoenician: gāmāl. Used informally, "camel" (or, more correctly, "camelid") refers to any of the seven members of the family Camelidae: the dromedary, the Bactrian, and the wild Bactrian (the true camels), plus the llama, the alpaca, the guanaco, and the vicuña (the "New World" camelids).
The dromedary (C. dromedarius), also known as the Arabian camel, inhabits the Middle East and the Horn of Africa, while the Bactrian (C. bactrianus) inhabits Central Asia, including the historical region of Bactria. The critically endangered wild Bactrian (C. ferus) is found only in remote areas of northwest China and Mongolia. An extinct species of camel in the separate genus Camelops, known as C. hesternus, lived in western North America until humans entered the continent at the end of the Pleistocene.