<P> The Karner blue ( Plebejus melissa samuelis ) is an endangered subspecies of small blue butterfly which was once found in significant numbers in the Miller section of Gary , Indiana community of the Indiana Dunes National Park . The butterfly is now mainly found in other parts of the Great Lakes states , such as Wisconsin and Michigan , in small areas of New Jersey , and also in southern New Hampshire , and the Capital District region of New York . The butterfly , whose life cycle depends on the wild blue lupine flower ( Lupinus perennis ) , was classified as an endangered species in 1992 . In May 2000 , the Canadian Species at Risk Act listed the Karner blue as being locally extinct in Canada . This subspecies of Plebejus melissa was described by novelist Vladimir Nabokov . </P>
<P> The Karner blue ( Plebejus melissa samuelis ) is an endangered subspecies of small blue butterfly which was once found in significant numbers in the Miller section of Gary , Indiana community of the Indiana Dunes National Park . The butterfly is now mainly found in other parts of the Great Lakes states , such as Wisconsin and Michigan , in small areas of New Jersey , and also in southern New Hampshire , and the Capital District region of New York . The butterfly , whose life cycle depends on the wild blue lupine flower ( Lupinus perennis ) , was classified as an endangered species in 1992 . In May 2000 , the Canadian Species at Risk Act listed the Karner blue as being locally extinct in Canada . This subspecies of Plebejus melissa was described by novelist Vladimir Nabokov . </P>
when did the karner blue butterfly become endangered
when did the karner blue butterfly become endangered
1992
1992