Hawks and Owls of the World: A Distributional and Taxonomic List
Amadon, Dean; Bull, John
Illustrations by Gilbert, Albert E.
Parallel Variation in North and Middle-American Screech- Owls
Marshall, Joe T.
Species Taxa of North American Birds: A Contribution to Comparative Systematics
Mayr, Ernst; Short, Lester L.
A Classification of the Tyrant Flycatchers (Tyrannidae).
Traylor, Melvin A., Jr.
Handbook of Avian Anatomy: Nomina Anatomica Avium. Second edition
Baumel, Julian J. , Editor
Audubon to Xantus: The Lives of Those Commemorated in North American Bird Names
Mearns, Barbara; Mearns, Richard
Phylogeny and Classification of Birds: A Study in Molecular Evolution
Sibley, Charles G.; Ahlquist, Jon E.
Distribution and Taxonomy of Birds of the World
Sibley, Charles G.; Monroe, Burt L. Jr.
Wrens, Dippers and Thrashers
Illustrations by Morehouse, Bonnie Swarbrick
Whose Bird? : Men and Women Commerated in the Common Names of Birds
Beolens, Bo; Watkins, Michael
Elsevier's Dictionary of Bird Names: In Latin, English, French, German, and Italian
Birds Alternative Names: A World Checklist