Detroit River International Wildlife Refuge Grassy Island Unit

Detroit River International Wildlife Refuge | U.S. Fish & Wildlife Service | The Detroit River has long served the United States and Canada as a vital transportation corridor and center for industries that helped forge the economies of both nations. As a result of this growth, the river and its ecosystem have paid a high price for human progress. Indeed, in our mind and in reality, most of what was natural in and around the Detroit River is gone. Yet special places exist alongside the concrete, steel, and groomed gardens of this vast metropolitan area, North America's only international wildlife refuge. A place where wildlife and humans can meet. Come and connect with nature!