Region
United States
18
Germany
12
Europe
7
North America
4
Confederate States of America
3
England
3
Estonia
2
Great Britain
2
Netherlands
2
Norway
2
Alberta
1
Allegheny River Valley (Pa. and N.Y.)
1
Allemagne
1
Amazon River Region
1
America
1
Angleterre
1
Asia
1
Assyria
1
British Columbia
1
Cambridge
1
Canada
1
China
1
Clear Creek (Woodford County, Ky.)
1
East Asia
1
France
1
Greece
1
Japan
1
Kentucky
1
Klamath Basin National Wildlife Refuges
1
Middle West
1
New York (State)
1
Norrland
1
Norrland (Sweden)
1
Sweden
1
Woodford County
1
Woodford County (Ky.)
1