Region
United States
721
Mexico
28
Colombia
10
North America
10
Dominican Republic
8
Puerto Rico
8
Chile
7
Mexican-American Border Region
6
Spain
6
Honduras
5
Panama
5
Guatemala
4
Uruguay
4
Argentina
3
Bosque del Apache National Wildlife Refuge
3
Bosque del Apache National Wildlife Refuge (N.M.)
3
El Salvador
3
New Mexico
3
Nicaragua
3
Peru
3
Bolivia
2
Cuba
2
Ecuador
2
Foreign countries
2
Alaska
1
Bexar County
1
California, Gulf of
1
Canada
1
Colorado River (Colo.-Mexico)
1
Costa Rica
1
Developing countries
1
Equatorial Guinea
1
Gulf Coast (U.S.)
1
Hawaii
1
Japan
1
Pacific Area
1
Rio Grande (Colo.-Mexico and Tex.)
1
Sun
1
Tallgrass Prairie National Preserve (Kan.)
1
Tegucigalpa (Francisco Morazán)
1
Texas
1
Tijuana River (Mexico and Calif.)
1
United States Virgin Islands
1
Venezuela
1
Western Hemisphere
1