Region
Nevada
United States
8
California
7
Arizona
4
Idaho
4
New Mexico
4
Mineral County
3
Montana
3
Utah
3
Alaska
2
Arkansas
2
Clark County
2
Colorado
2
Louisiana
2
Oregon
2
San Bernardino County
2
Virginia
2
Washington (State)
2
Bannock County
1
Blackfeet Indian Reservation (Mont.)
1
California, Southern
1
Clallam County
1
Connecticut
1
Costa Rica
1
Crescent Valley
1
Esmeralda County
1
Eureka County
1
Gilpin County
1
Granite County
1
Great Salt Lake
1
Iliamna Region
1
Inyo County
1
Klamath Mountains (Calif. and Or.)
1
Maine
1
Manhattan
1
Minnesota
1
Navajo Indian Reservation
1
North America
1
North Carolina
1
Panama
1
Pima County
1
Pinal County
1
Rhode Island
1
Santa Cruz County
1
South Carolina
1
Tennessee
1
Texas
1
Trinity County
1
Yukon
1