Asia-Temperate Caucasus North Caucasus Europe Eastern Europe Baltic States Belarus Central European Russia East European Russia South European Russia Ukraine Middle Europe Austria Belgium Czechoslovakia Germany Hungary Netherlands Poland Switzerland Southeastern Europe Albania Bulgaria Greece Italy Romania Yugoslavia Southwestern Europe France Spain Northern America Eastern Canada Labrador New Brunswick Newfoundland Nova Scotia Ontario Prince Edward I. Québec North-Central U.S.A. Illinois Iowa Minnesota Missouri North Dakota South Dakota Wisconsin Northeastern U.S.A. Connecticut Indiana Maine Masachusettes Michigan New Hampshire New Jersey New York Ohio Pennsylvania Rhode I. Vermont West Virginia Northwestern U.S.A. Colorado Idaho Montana Oregon Washington Wyoming South-Central U.S.A. New Mexico Southeastern U.S.A. Georgia Kentucky Maryland North Carolina Tennessee Virginia Southwestern U.S.A. Arizona California Nevada Utah Subarctic America Alaska Aleutian Is. Yukon Western Canada Alberta British Columbia Manitoba Saskatchewan Introduced into Asia-Temperate Middle Asia Kazakhstan Europe Northern Europe Denmark Finland Great Britain Norway Sweden Southern America Western South America Bolivia

Asia-Temperate Caucasus North Caucasus Europe Eastern Europe Baltic States Belarus Central European Russia East European Russia South European Russia Ukraine Middle Europe Austria Belgium Czechoslovakia Germany Hungary Netherlands Poland Switzerland Southeastern Europe Albania Bulgaria Greece Italy Romania Yugoslavia Southwestern Europe France Spain Northern America Eastern Canada Labrador New Brunswick Newfoundland Nova Scotia Ontario Prince Edward I. Québec North-Central U.S.A. Illinois Iowa Minnesota Missouri North Dakota South Dakota Wisconsin Northeastern U.S.A. Connecticut Indiana Maine Masachusettes Michigan New Hampshire New Jersey New York Ohio Pennsylvania Rhode I. Vermont West Virginia Northwestern U.S.A. Colorado Idaho Montana Oregon Washington Wyoming South-Central U.S.A. New Mexico Southeastern U.S.A. Georgia Kentucky Maryland North Carolina Tennessee Virginia Southwestern U.S.A. Arizona California Nevada Utah Subarctic America Alaska Aleutian Is. Yukon Western Canada Alberta British Columbia Manitoba Saskatchewan Introduced into Asia-Temperate Middle Asia Kazakhstan Europe Northern Europe Denmark Finland Great Britain Norway Sweden Southern America Western South America Bolivia