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Karner Blue butterfly (Lycaeides melissa samuelis)
The Karner blue butterfly, an endangered species, is a small butterfly that lives in oak savannas and pine barren ecosystems from eastern Minnesota and eastward to the Atlantic seaboard. Historically, it was found in a continuous band throughout its range but today is found in portions of New Hampshire, New York, Michigan, Wisconsin, Ohio, Indiana, and Minnesota. The wild blue lupine (Lupinus perennis) is the only food plant for the Karner caterpillar. But the range of Karners and lupine do not completely overlap. Instead, Karners are found along the northern band of lupine range. In Minnesota, Karner blues remain only at Whitewater State Park.