DU Conservation Priority Areas © Scott Grubbs See how DU is conserving critical habitat in these priority areas. Level I Prairie Pothole Region Western Boreal Forest - Canada Mississippi Alluvial Valley Central Valley / Coastal California Gulf Coastal Prairie Level II U.S. Great Lakes System Great Basin Hardwood Transition / Lower Great Lakes / St. Lawrence Plain – Ontario Mid-Atlantic Coast Pacific Northwest Southern Great Plains Level III Baja California Desert Western Boreal Forest - Alaska British Columbia Intermountain Gulf Coast / Yucatan – Mexico Hawaii North Atlantic / New England Coast Northern Rockies and Southern Rockies / Colorado Plateau Northwestern Great Plains Peninsular Florida Southeastern Coastal Plain Upper Mississippi River West Coast of Mexico West Gulf Coastal Plain Level IV Western Alaska / Aleutian – Bering Sea Islands Atlantic Canada Arctic Plains and Mountains – Alaska Interior Highlands Latin America & the Caribbean Northeastern U.S. Forests Other Areas Sierra Nevada Sonoran and Mohave Deserts / Sierra Madre Occidental Conservation in Canada Ducks Unlimited Canada