Birds in Kansas. Volumes I & II
Thompson, Max C. & Charles Ely
Kansas Breeding Bird Atlas
Busby, William H.; Zimmerman, John L.
Peterson Field Guide to Birds of Eastern and Central North America, Seventh Edition
Peterson, Roger Tory; Peterson, Virginia Marie
Illustrations by Peterson, Roger Tory
ABA Birdfinding Guide: A Birder's Guide to Southern California. Fifth edition
ABA Birdfinding Guide: A Birder's Guide to the Rio Grande Valley, Fourth edition
LOCKWOOD, Mark; MCKINNEY, William B.; PATON, James N.; ZIMMER, Barry R.
Guide to the Birds of Alaska, 6th edition
Armstrong, Robert H.
Peterson Field Guide to Birds of North America, Second edition
Peterson, Roger Tory
Birds of New York State
Kaufman Field Guide to Birds of North America
A Photographic Guide to the Birds of Wintergreen, with an Introduction to the Area and to Other Loca
Birds of Missouri: Their Distribution and Abundance
Robbins, Mark B.; Easterla, David A.
ABA Birdfinding Guide: A Birder's Guide to the Rio Grande Valley, Second edition
Holt, Harold R.