A lone wolf stops traffic in Yellowstone's Hayden Valley. Greater Yellowstone is the only ecosystem left in the Lower 48 with all of its original free-ranging large mammals that were here before Europeans arrived on the continent—a fact not lost on Castro-Root.
A lone wolf stops traffic in Yellowstone's Hayden Valley. Greater Yellowstone is the only ecosystem left in the Lower 48 with all of its original free-ranging large mammals that were here before Europeans arrived on the continent—a fact not lost on Castro-Root.