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Africa Northern Africa Tunisia Asia-Temperate Caucasus North Caucasus Transcaucasus Middle Asia Kazakhstan Kirgizistan Mongolia Mongolia Russian Far East Amur Kamchatka Khabarovsk Kuril Is. Magadan Primorye Sakhalin Siberia Altay Chita Krasnoyarsk Tuva West Siberia Europe Eastern Europe Baltic States Belarus Central European Russia East European Russia North European Russia Northwest European Russia South European Russia Ukraine Middle Europe Austria Belgium Czechoslovakia Germany Hungary Netherlands Poland Switzerland Northern Europe Denmark Finland Føroyar Great Britain Iceland Ireland Norway Sweden Southeastern Europe Albania Bulgaria Greece Italy Romania Turkey-in-Europe (Doubtful) Yugoslavia Southwestern Europe Corse France Spain Northern America Subarctic America Aleutian Is. Greenland Introduced into Africa Macaronesia Madeira Antarctic Subantarctic Islands South Georgia Australasia Australia Tasmania Victoria Europe Northern Europe Svalbard Southwestern Europe Sardegna Northern America Eastern Canada Labrador New Brunswick Newfoundland Nova Scotia Ontario Prince Edward I. Québec North-Central U.S.A. Illinois Iowa Kansas 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 Oregon Washington Wyoming South-Central U.S.A. New Mexico Southeastern U.S.A. Alabama Delaware District of Columbia Georgia Kentucky Maryland North Carolina South Carolina Tennessee Virginia Southwestern U.S.A. Arizona California Nevada Utah Subarctic America Alaska Northwest Territories Western Canada Alberta British Columbia Manitoba Saskatchewan Southern America Caribbean Bermuda Western South America Peru