Region
Mexico
Baja California (Peninsula)
8
California
7
Arizona
3
Baja California Sur
2
California, Southern
2
Chihuahua (State)
2
Sonora (State)
2
United States
2
Baja California (State)
1
Belize
1
Cananea
1
Caribbean Area
1
Coast Ranges
1
Colorado River Delta
1
Guatemala
1
Hidalgo (State)
1
Hidalgo del Parral
1
Mexicali Region
1
Nogales
1
Nogales (Nogales)
1
Pacific Coast (North America)
1
Parícutin area
1
Southwest, New
1
Superstition Hills
1
Texas
1
Zacatecas (State)
1