Predators save national park

After 70 years of absence, wolves returned to Yellowstone, changing the national park's landscape completely.

In 20 years, wolves have saved plant and animal life in the American Yellowstone national park. Wolves went extinct in the park in 1926, and the predator's disappearance caused the numbers of deer and small predators to increase tremendously. The deer reduced plant diversity, while predators consumed rodents and birds. In 1995, the wolf was successfully reintroduced, reducing the number of deer and changing the places where herbivores dare to be. So, more plant species have emerged to the benefit of many animals such as grizzlies feeding on berries. Moreover, wolves reduce the number of small predators, leaving room for beavers, squirrels, hares, etc.