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Image by 12fh
Addax (Addax nasomaculatus.) Hailing from the Sahara Desert, the addax has evolved broad, flat hooves to prevent sinking into the sand and a light coat to reflect the desert sun. The species is highly endangered but breeds well in captivity, bearing one calf at a time with a gestation period of 8 1/2 months. Addaxes can grow to 250 lbs in size and live about 20 years in captivity, and their horns (possessed by both males and females) can grow as long as 3 1/2 feet.