Region
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Canada
10
Canelo Hills Cienega (Ariz.)
1
Cape Lookout National Seashore
1
Cape Lookout National Seashore (N.C.)
1
Caribbean Area
1
Cayman Islands
1
Central Valley
2
Chamoli District
2
Charles M. Russell National Wildlife Refuge (Mont.)
1
Chesapeake Bay Watershed
1
China
10
Chine
1
Cibola National Forest (N.M.)
1
Coachella Valley
1
Coachella Valley (Calif.)
1
Colorado
5
Colorado River Watershed (Colo.-Mexico)
1
Columbia River
1
Congo (Brazzaville)
1
Congo (Democratic Republic)
1
Costa Rica
1
Dalles Dam (Or. and Wash.)
1
De Soto National Wildlife Refuge (Neb. and Iowa)
1
Delmarva Peninsula
1
Denali National Park and Preserve
1
Des Lacs National Wildlife Refuge
1
Des Lacs National Wildlife Refuge (N.D.)
1
Dolores County
1
Dominica
1
Douglas County
1
Dungeness National Wildlife Refuge
1
Dungeness National Wildlife Refuge (Wash.)
1
Dungeness Spit
1
East (U.S.)
3
Eastern Egg Rock
1
England
2
Environmental aspects
1
Europe
2
Everglades
2
Everglades (Fla.)
1
Everglades National Park
1
Everglades National Park (Fla.)
1
Falkland Islands
1
Fiji
2
Florida
9
Fort Bragg
1
Fossil Creek
4
Fossil Creek (Ariz.)
4
Frank Church-River of No Return Wilderness (Idaho)
3
Gambia
1
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