Region
United States
809
China
10
Russia (Federation)
8
California
6
West (U.S.)
5
Alaska
4
Canada
4
Europe
4
Africa, Sub-Saharan
3
Asia, Central
3
European Union countries
3
Latin America
3
Africa, West
2
Africa, Western
2
Arctic National Wildlife Refuge
2
Europe, Eastern
2
Former Soviet republics
2
India
2
Mexico
2
Mexico, Gulf of
2
Texas
2
Tibet Autonomous Region (China)
2
West Virginia
2
Western Hemisphere
2
Africa South of the Sahara
1
Arctic National Wildlife Refuge (Alaska)
1
Arizona
1
Brazil
1
Caspian Sea Region
1
Colorado
1
Developing countries
1
Eurasia
1
Germany
1
Guinea, Gulf of
1
Houston
1
Minnesota
1
New Hampshire
1
New Mexico
1
New York (State)
1
North America
1
Northwestern States
1
Tennessee River Valley
1
Tonto National Forest
1
Turkey
1
Ukraine
1
United States Virgin Islands
1