Audubon Guide to the National Wildlife Refuges: Rocky Mountains: Idaho, Colorado, Montana, Utah, Wyoming

Audubon Guide to the National Wildlife Refuges: Alaska & the Pacific Northwest: Alaska, Oregon, Washington (Audubon Guides to the National Wildlife Refuges)

Audubon Guide to the National Wildlife Refuges: Southwest: Arizona, Nevada, New Mexico, Texas (Audubon Guides to the National Wildlife Refuges)

Audubon Guide to the National Wildlife Refuges: Northern Midwest: Illinois, Indiana, Iowa, Michigan, Minnesota, Nebraska, North Dakota, Ohio, South ... Guides to the National Wildlife Refuges)

Audubon Guide to the National Wildlife Refuges: Southeast: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, Puerto Rico, South ... Guides to the National Wildlife Refuges)

Audubon Guide to the National Wildlife Refuges: South Central: Arkansas, Kansas, Louisiana, Missouri, Oklahoma (Audubon Guides to the National Wildlife Refuges)

National Geographic Guide to Birding Hot Spots of the United States

Audubon Guide to the National Wildlife Refuges: Mid-Atlantic: Delaware, Maryland, New Jersey, New York, Pennsylvania, Virginia, West Virginia (Audubon Guides to the National Wildlife Refuges)

Audubon Guide to the National Wildlife Refuges: New England: Connecticut, Mane, Massachussetts, New Hampshire, Rhode Island, Vermont (Audubon Guides to the National Wildlife Refuges)