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They can live in herds of 100,000 to 1,000,000. But, that usually depends on how strong the herds are. Such as if the herds are sick and weak with little food, ( There can be competition between the bison and the caribou for food)or if they might have a sickness sweeping through the herd, or on the other hand; Maybe the herd has a good food supply and a lucky breeding season!

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15y ago

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