66. The Gray Wolf
The gray (or grey) wolf is a big canine native to both North America and Eurasia. On average they weigh 88 pounds. They’re up to 63 inches long and have a shoulder height of up to 33 inches. This pack animal is thriving in Alaska but is otherwise endangered in almost every other state. While you could potentially see a gray wolf in a number of US national parks, the best place to spot one is at the popular Grizzly and Wolf Discovery Center found in famous Yellowstone National Park.
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