Buteo
Crocoll, S. T., and J. W. Parker. 1989. The breeding biology of broad-winged and red-shouldered hawks in western New York. J. Raptor Res. 23:125-39.
Palmer, R. S. 1988c. Red-shouldered hawk, ASTURINA LINEATA. Pages 413-29 in R. S. Palmer (editor). Handbook of North American Birds. Vol. 4: Diurnal Raptors (Part 1). Yale University Press, New Haven, Connecticut. 433 pp.
Titus, K., et al. 1989a. Buteos. Pages 53-64 in Proceedings of the Northeast Raptor Management Symposium and Workshop. National Wildlife Federation, Washington, D.C.
Kocan, A. A., J. Snelling, and E. C. Greiner. 1977. some infectons and parasitic diseases in Oklahoma raptors. J. Wildl. Dis. 13:304-6.