Region
United States
496
Developing countries
21
Africa
18
Colorado
17
West (U.S.)
17
Australia
15
New Mexico
14
Arizona
13
Montana
12
Texas
12
Tropics
10
Colombia
9
Idaho
9
Kansas
9
Northeastern States
9
Utah
9
Oklahoma
8
Alaska
7
California
7
China
7
Tennessee
7
Hawaii
6
India
6
Mexico
6
Washington (State)
6
Wisconsin
6
Brazil
5
Cibola National Forest
5
Cibola National Forest (N.M.)
5
Minnesota
5
New York (State)
5
North America
5
Pennsylvania
5
Peru
5
Southeast Asia
5
White River National Forest
5
White River National Forest (Colo.)
5
Africa, Southern
4
England
4
Florida
4
Middle West
4
New Zealand
4
Oregon
4
Virginia
4
West Virginia
4
Yellowstone National Park
4
Amazon River Region
3
Asia
3
Cambodia
3
Canada
3
more ...