A juvenile from the Wapiti Lake Pack in Yellowstone National Park.
In 1995, gray wolves were reintroduced to the park. The wolf population quickly expanded, and packs established territories. Elk numbers dropped, which helped to restore vegetation.
The story of gray wolf recovery in Yellowstone is hailed as one of the world's greatest conservation success stories., but many fear that the population is once again threatened. A growing number of people are calling for federal protections.
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