Region
United States
64
Back Bay National Wildlife Refuge
2
Back Bay National Wildlife Refuge (Va.)
2
California
2
Virginia
2
Canada
1
Don Edwards San Francisco Bay National Wildlife Refuge
1
Don Edwards San Francisco Bay National Wildlife Refuge (Calif.)
1
Great Britain
1
Middle West
1
Minnesota
1
Minnesota Valley National Wildlife Refuge (Minn.)
1
Mongolia
1
Morocco
1
Nebraska
1
Oregon
1
Santa Monica Mountains National Recreation Area (Calif.)
1
Virginia Beach Region
1