Dromedaries in a desert. Dromedaries, like camels, are mammals with long legs and a big-lipped snout. The difference between the two is that the dromedary has a single-humped back, while that of the camel is double-humped. They are used as a means of transport and also as a source of fresh milk and meat. Photographed in Erg Chebbi, a desert area in the east of Morocco.