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Do gray wolves eat beavers and hares?

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Yes, gray wolves do eat beavers and hares when they are available.12

While the primary prey of the gray wolf consists of large herbivores—such as deer, elk, moose, bison, bighorn sheep, caribou, and musk oxen—their diet is opportunistic. In addition to these animals, wolves in certain regions, such as western Canada, have even been observed fishing for salmon.12