Narrower Terms (8)

• Crab Orchard National Wildlife Refuge (Ill.)
• Cypress Creek National Wildlife Refuge (Ill.)
• Driftless Area National Wildlife Refuge
• Emiquon National Wildlife Refuge (Ill.)
• Grand Kankakee Marsh National Wildlife Refuge (Ind. and Ill.)
• Lost Mound National Wildlife Refuge (Ill.)
• Mark Twain National Wildlife Refuge (Ill.)
• Meredosia National Wildlife Refuge (Ill.)