life cycle

Olendorff, R. R. 1993. Status, biology, and management of ferruginous hawks: a review. Raptor Res. and Tech. Asst. Cen., Spec. Rep. U.S. Dept. Interior, Bur. Land Manage., Biose, Idaho.. . 84 p.

Burt, W. H. 1976. A field guide to the mammals. Houghton Mifflin Company, Boston, Massachusetts. 289 pp.

• morphology
• life cycle
• distribution
• HABITAT
• behavior

Pyle, R. M. 1981. The Audubon Society Field Guide to North American Butterflies. Alfred A. Knopf, New York, New York. 916 pp. + color plates.

• taxonomy
• life cycle
• morphology
• HABITAT
• distribution
• butterfly