The saiga antelope is a critically endangered antelope that originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathian Mountains and Caucasus into Dzungaria and Mongolia. The large humped nose hangs over the mouth of the saiga. The nose is flexible and inflatable so helps it to breathe clean air during dusty summers and warm air during cold winters. Saiga antelope has long, thin legs but is similar in size to a sheep.