| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| National Audubon Society Field Guide to California | 978-0-679-44678-1 (0-679-44678-8) | 1998 | Peter Alden · Fred Heath · Richard Keen · Wendy B. Zomlefer |
| National Audubon Society Regional Guide to the Rocky Mountain States | 978-0-679-44681-1 (0-679-44681-8) | 1999 | Brian Cassie · John Grassy · Jonathan D. Kahl · Daniel Mathews · Wendy B. Zomlefer |
| National Audubon Society Regional Guide to the Southwestern States: Arizona, New Mexico, Nevada, Utah | 978-0-679-44680-4 (0-679-44680-X) | 1999 | Brianbon Society Cassie · Peter Friederici · Jonathan D. Kahl · Patrick Leary · Wendy B. Zomlefer |