Within Camelus two species are generally accepted: C. dromedarius, the one-humped or
Arabian camel or dromedary; and C. bactrianus, the Bactrian camel or two-humped
camel. Biologically, the species division is not correct, as the two freely interbreed in
either direction and produce fertile offspring. There are four species of new world
Camelidae of which two are domesticated and two wild. The llama, L. glama, is used
mainly as a pack animal, while the alpaca, L. pacos, is primarily a producer of high
quality fibre. The two wild species are the guanaco, L. guanicoe and the vicuna, ...