Vilka nationalparker har vargar?

Det finns 19 nationalparker i den kontinenta USA som har gråvargar: Isle Royale National Park, North Cascades National Park, Sequoia and Kings Canyon National Parks, Yellowstone National Park, Crater Lake National Park, Mount Rainier National Park, Grand Teton National Park, Great Smoky Mountains National Park, Glacier National Park, Voyageurs National Park, Olympic National Park, Denali National Park, Great Basin National Park, Rocky Mountain National Park, Hot Springs National Park, Lassen Volcanic National Park, Glacier Bay National Park, Yosemite National Park och Wrangell-St. Elias National Park.

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