Saiga Antelope Otherwise known as saiga tatarica originally lived in the Eurasian steppe. They also lived in North America. Today they are only found in Russia and Kazakhstan. Normally their height is 0.6 - 0.8 meters at the shoulder and weighs 36 - 63 kilograms (79- 139 Pounds). Their lifespan is 6 to 10 years. They are in Phylum: Chordata, Class: Mammalia, Family: Bovidae. They form large herds in grasslands, steppes, and semidesserts. They eat several plants that are poisonous to other animals