Humbug Marsh, a 1.88 square kilometres (0.73 sq mi) wetland in southeastern Wayne County, Michigan, is a constituent element of the Detroit River International Wildlife Refuge. It is listed as a RAMSAR wetland of international importance.Although Humbug Marsh is located within heavily populated Metro Detroit, it is acclaimed as a high-quality remnant of the wetlands that once lined both sides of the international Detroit River.
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