Region
United States
188
États-Unis
41
California
7
Louisiana
7
Washington (D.C.)
7
Great Lakes (North America)
4
New York (State)
4
North America
4
Appalachian Region
3
Colorado
3
Florida
3
Long Island Sound (N.Y. and Conn.)
3
Maryland
3
New York
3
North Carolina
3
Alaska
2
Blackwater National Wildlife Refuge
2
Blackwater National Wildlife Refuge (Md.)
2
Caribbean Area
2
Chesapeake Bay Region (Md. and Va.)
2
Gulf States
2
Latin America
2
San Francisco Bay
2
Southern Ute Indian Reservation
2
Southern Ute Indian Tribe of the Southern Ute Reservation, Colorado
2
Tahoe, Lake (Calif. and Nev.)
2
Tahoe, Lake, Watershed (Calif. and Nev.)
2
Virginia
2
Africa
1
Africa, Sub-Saharan
1
Afrique subsaharienne
1
Alabama
1
Amérique du Nord
1
Amérique latine
1
Apalachicola River
1
Apalachicola River Watershed
1
Asia
1
Asie
1
Atlantic Ocean
1
Cahaba River National Wildlife Refuge
1
Cahaba River National Wildlife Refuge (Ala.)
1
Canada
1
Canal Zone
1
Canal de Panamá (Panamá)
1
Captiva Island
1
Captiva Island (Fla.)
1
Caraïbes (Région)
1
Cat Island National Wildlife Refuge
1
Cat Island National Wildlife Refuge (La.)
1
Champlain, Bassin du lac
1
more ...