Bird Books
[National Geographic Society, Field Guide to the Birds of North America Second Edition, National Geographic Society, Washington, D.C., 1987]
[Fowler, H. Seymour, Fieldbook of Natural History, Second Edition, McGraw-Hill Book Company, New York, 1975]
[Robbins, Chandler S.; Bruun, Bertel and Zim, Herbert S., A Guide to Field Identification Birds of North America, Golden Press, New York, 1983]