Region
Mexico
United States
58
California, Gulf of
6
Central America
5
Canada
3
Mexican-American Border Region
3
Zinacantán
3
Pacific Coast
2
Zinacantán (Mexico)
2
California
1
Campeche Bank
1
Colorado River (Colo.-Mexico)
1
Cuba
1
Djibouti
1
Galapagos Islands
1
Guatemala
1
Mexico City
1
North America
1
Pacific Coast (Central America)
1
San Luis Potosí (State)
1
San Quintín Valley
1
Southern States
1
West (U.S.)
1
West Indies
1
Yaqui River Valley
1