Chiwaukee Prairie, 477 acres, is one of the largest prairie complexes in the state and the most intact coastal wetland in southeastern Wisconsin. The prairie contains an exceptional diversity of plants and animals. The northernmost portion, Kenosha Sand Dunes, contains open and stabilized sand dunes. This variety of habitats, coupled with their location in the extreme southeastern corner of the state, allows several rare and geographically restricted plants, amphibians, reptiles, birds, invertebrates, and mammals to thrive here. Twenty-six rare plant species, 10 of which are listed as endangered or threatened grow in the prairie. More than 75 species of grassland and wetland birds have been observed during the breeding season. Chiwaukee Prairie is recognized as a National Natural Landmark by the National Park Service and was designated a State Natural Area in 1967.