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Vetstreet: 20 Animals You Might Not Know Are Going Extinct

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Zebras may be a common sight in zoos around the U.S., but they are rapidly declining in their native habitats. A subspecies of zebra found in Africa, Grevy's zebra, was listed "threatened" in 1979. As the largest and wildest of the three zebra subspecies, Grevy's zebra populations are decreasing at an alarming rate due to habitat fragmentation and agricultural livestock overgrazing.

(Credit: Thinkstock)

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