Our story follows three key predators in the Yellowstone Ecosystem: the wolf, red fox, and coyote. For centuries, man worked to eradicate these canids from the landscape. Scientists realized in the late 20th century that a balanced and healthy ecosystem needs these animals. Scientists and officials from the Grand Teton National Park have embarked on a multi-year tagging effort to understand best how to live with all three of these canid predators.