Thorstrom, R. 2000. The food habits of sympatric
forest-falcons during the breeding season in northeastern
Guatemala. Journal of Raptor Research 34:196-202.
Thorstrom, R., J. D. Ramos, and C. M. Morales. 2000.
Breeding biology of Barred Forest-Falcons (Micrastur
ruficollis) in northeastern Guatemala. Auk 117:781-786.
Whitacre, D. F., J. A. Madrid M., H. D. Madrid M., R.
Cruz E., C. J. Flatten, and S. Funes A. unpublished.
"Ornate Hawk-Eagle (Spizaetus ornatus). chapter
in book, "Raptors of the Maya Forest".