The saiga (Saiga tatarica) is a critically endangered antelope which originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathian Mountains and Caucasus into Dzungaria and Mongolia. They also lived in North America during the Pleistocene. Today, the nominate subspecies (S. t. tatarica) is only found in one location in Russia (steppes of the northwest Precaspian region) and three areas in Kazakhstan (the Ural, Ustiurt and Betpak-dala populations). A proportion of the Ustiurt population migrates south to Uzbekistan and occasionally Turkmenistan in winter. It is extinct in China and southwestern Mongolia. The Mongolian subspecies (S. t. mongolica) is found only in western Mongolia.The saiga typically stands 0.6–0.8 m (1 ft 10 in–2 ft 7 in) at the shoulder and weighs between 36 and 63 kg (79 and 140 lb). The horned males are larger than the hornless females. Their lifespans range from 6 to 10 years. The saiga is recognizable by an extremely unusual, over-sized, flexible nose structure, the proboscis.
From : http://en.wikipedia.org/wiki/Saiga_antelope