Bactrian camels are the only of the two camel species (Bactrian and Dromedary) that have a wild population. However this is estimated currently to be at 600 individuals or less. They are usually larger than Dromedary camels and have two humps. They can withstand extreme changes in temperature, from sub zero temperatures to desert heat. They have the fairly rare ability to eat snow for moisture. Snow drops the body temperature too far to be useful to many animals, though these camels can only eat a little at a time.