Region
Asia, Eastern
1
California
1
Canada
1
China
1
Colorado
3
Gettysburg National Military Park (Pa.)
1
Great Britain
2
J. Clark Salyer National Wildlife Refuge
1
J. Clark Salyer National Wildlife Refuge (N.D.)
1
Kentucky
1
Micronesia
1
New Mexico
2
New York (N.Y.)
1
New York County (N.Y.)
1
North Dakota
1
Rome
2
Southern States
1
Switzerland
1
United States
170
Virginia
1
Washington (D.C.)
1
Washington (State)
1
Wyoming
1