Harbor Island National Wildlife Refuge offers visitors a unique experience. These forested islands in Lake Huron offer visitors a chance to explore forest habitats largely unaltered by people. Leaf litter and moss spot the forest floor where you can find garter snakes pursuing toads and tiny spring peepers. Butterflies float on the breeze. Watch for belted kingfishers, bald eagles, northern flickers, common terns, winter wrens and a variety of warblers.