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9 of the world's largest animal swarms

By: Bryan Nelson on Dec. 23, 2013, 1:07 p.m.

Photo: Bildagentur Zoonar GmbH/Shutterstock

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These frolicking antelope have been known to form the largest herds ever recorded. It has been estimated that some herds numbered in the tens of millions, and likely spanned for as long as 90 miles.

Unfortunately, hunting, habitat loss and disease have drastically reduced their numbers, so they are not as numerous as they once were. We can only imagine the spectacle of such massive herds dancing across the African grasslands today.