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The National Natural Landmarks (NNLs) in Illinois include 18 of the almost 600 such landmarks in the United States. They cover areas of geological, biological and historical importance, and include lakes, bogs, canyons and forests. Several of the sites provide habitat for rare or endangered plant and animal species.
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.
Volo Bog State Natural Area is a nature reserve in Illinois, United States, preserving Volo Bog. The bog was designated a National Natural Landmark in 1973 as the only remaining open-water quaking bog in Illinois. [1] The site also contains woodlands, savanna, marshes, prairie restoration areas, shrubland and old fields.
Mitchell's Grove Nature Preserve is a 184 acres (74 ha) nature preserve and State Natural Area [2] located in LaSalle County, Illinois, situated between Tomahawk Creek and the Little Vermillion River north of their confluence. It is composed of diverse terrain with over 300 plant species present. [3]
The National Park Service operates the federally owned Lincoln Home National Historic Site in Springfield, the Pullman National Historical Park in Chicago, and the New Philadelphia National Historic Site in Pike County in rural western Illinois. The Chicago Portage National Historic Site is a National Park Service-affiliated site which is ...
The Illinois Land Conservation Act (Public Law 104-106) created the Midewin National Tallgrass Prairie, designated the transfer of 19,165 acres (7,756 ha) of land in Illinois from the U.S. Army to the U.S. Department of Agriculture's Forest Service. The Illinois Land Conservation Act mandates that Midewin be managed to meet four primary objectives:
The upland or hill prairie was once the dominant ecosystem for much of the land that became the U.S. state of Illinois, the Prairie State.The state's Department of Natural Resources, which owns the prairie parcel, describes it as containing "the largest complex of the highest quality, essentially undisturbed loess hill prairies along the Mississippi River in Illinois."
Crab Orchard National Wildlife Refuge is a 43,890 acre (180 km 2) National Wildlife Refuge primarily in southwestern Williamson County, but with small extensions into adjacent eastern Jackson and northeastern Union counties of southern Illinois, in the United States. Its land and water contain a wide diversity of flora and fauna.