Visitors at Yellowstone National Park may get lucky enough to hear the howling of wolves in the distance at the park. However, those moonlight nights were once silent, after the natural population of ...

Over the last three decades, Yellowstone National Park has undergone an ecological cascade. As elk numbers fell, aspen and willow trees thrived. This, in turn, allowed beaver numbers to increase, ...

Previous research on the effect of wolves on the food web has been criticized, raising questions about the predator’s role in the Yellowstone ecosystem. When you purchase through links on our site, we ...