Subject Region
United States
7
North America
5
Antarctica
2
Africa
1
Amazon River Valley
1
America
1
Appalachian Mountains
1
Australia
1
Earth (Planet)
1
Great Plains
1
Hawaii
1
Honduras
1
Japan
1
Magee Marsh Wildlife Area
1
Magee Marsh Wildlife Area (Ohio)
1
North Atlantic Ocean
1
Northern Territory
1
Oceania
1
Ohio
1
Rocky Mountains
1
Solar system
1
West (U.S.)
1
Yellowstone National Park
1