Saiga Antelope, ​Saiga tatarica.

The Saiga Antelope is one of the rarest antelopes on the planet and can easily be recognised by their long pair of closely spaced, 
bloated nostrils directed downward.
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Were do they live:  Eurasian steppe zone from the foothills of the Carpathian Mountains and Caucasus into Dzungaria and 
Mongolia.
What do they eat: They are grazers and live off grassland.
Whats their habitat: Grasslands and foothills
How many left in the wild: Current estimate is 50,000
Conservation status: Critically endangered
Major threats: Wolves and Mans desire for their medicinal horn.

YouTube

This animal is very rare and there are not well known probably because of where they live - but there a a few videos.

Wikipedia

Not the most written about antelope but what facts there are can be found on a few pages - but content is out of date.

Conservation Project

Houston Zoo is working with the Saiga Conversation Alliance as they are one of the few people who have acces.