Wildlife: The ‘Gray Wolves’ Of Yellowstone (Video)

Watch the majestic wolves of Yellowstone National Park. Videographer: Justin Grubb.

Gray wolves were reintroduced into Yellowstone National Park in 1995, resulting in a trophic cascade through the entire ecosystem. After the wolves were driven extinct in the region nearly 100 years ago, scientists began to fully understand their role in the food web as a keystone species.

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