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Region
- AlaskaAlaska Peninsula Region1
- AlaskaKatmai National Park and Preserve Region1
- Appalachian Region1
- Arkansas1
- Blue Ridge Mountains1
- CaliforniaMonterey County1
- CaliforniaSan Francisco Bay Area1
- Connecticut1
- East (U.S.)1
- Idaho1
- IdahoSalmon River Watershed1
- IdahoWhite Cloud Peaks Region1
- Iowa1
- Kansas2
- Long Island Sound (N.Y. and Conn.)1
- Louisiana1
- Manitoba1
- Michigan2
- Middle West3
- Milk River Watershed (Mont. and Alta.)1