The red-tailed hawk kemsiesi (Buteo jamaicensis kemsiesi) is a dark subspecies of red-tailed hawk resident from Chiapas, Mexico, to Nicaragua. The wing chord of males can range from , averaging , and, in females, it ranges from , averaging . Males and females average in tail length, in tarsal length and in culmen length.Preston, C. R. & Beane, R. D. (2009). "Red-tailed Hawk (Buteo jamaicensis)". The Birds of North America. .Blake, E. R. (1977). Manual of Neotropical Birds (Vol. 1). University of Chicago Press. This race is similar to the southwestern red-tailed hawk (B. j. fuertesi) but markedly smaller, with its thighs barred with rufous. The dark wing marking may not be distinct in paler birds. A dark morph, similar to the western red-tailed hawk (B. j. calurus), is known to occur in this race.Palmer, R. S. ed. (1988). Handbook of North American Birds. Volume 5 Diurnal Raptors (Part 2).
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