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Region
- Alaska >> United States 4
- Oregon >> United States 3
- Aleutian Islands >> Alaska >> United States 1
- Arizona >> United States 1
- California >> United States 1
- Clear Lake National Wildlife Refuge >> Modoc County >> California >> United States 1
- Lower Klamath National Wildlife Refuge >> Siskiyou County >> California >> United States 1
- New Mexico >> United States 1
- Pribilof Islands >> Aleutians West Census Area >> Alaska >> United States 1
- Texas >> United States 1
- Tucker Wildlife Sanctuary >> Orange County >> California >> United States 1
- Tule Lake National Wildlife Refuge >> Siskiyou County >> California >> United States 1
- Warner Valley >> Lake County >> Oregon >> United States 1
- White Sands National Monument >> Otero County >> New Mexico >> United States 1