246 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Buteo horenlis calurus Nelson, Bull. Essex Inst., viii, 1876, 119 (ne. Illinois; 

 near Chicago; spec). — Dawson, Birds Ohio, 1903, 405, 657 (Ohio; descr. ; 

 distr.). — Jones, Birds Ohio, rev. cat., 1903, 217 (Ohio; 1 spec). — [Nash], 

 Check List Vert. Ontario: Birds, 1905, 40, in text (Ontario; occas.). 



Buteo calurus Dawson, Birds Ohio, 1903, 405 (Franklin County, Ohio; spec). 



Buteo jamaicensis Taverner, Condor, xxxviii, 1936, 66, in text (crit.). — Ober- 

 HOLSER, Bird Life Louisiana, 1938, 165 (Louisiana; rare winter vis. in s. 

 part). — Baumgras, Wils. Bull., Ivii, 1945, 129 (Michigan; kills crows). — 

 GooLiN, Wils. Bull., Ivii, 1945, 131 (Ohio; bones from mounds). 



BUTEO JAMAICENSIS CALURUS Cassin 



Western Red-tailed Hawk 



Adult. — Melanistic phase (sexes alike) : Entire head, body, 

 wings, except the remiges, and thighs uniform fuscous to chaetura 

 drab; the upper tail coverts orange-cinnamon basally; the under tail 

 coverts pale cinnamon subterminally very broadly marked with fus- 

 cous and edged and tipped with orange-cinnamon; remiges as in the 

 pale ("normal") phase or as in borealis, but the white grayer and the 

 dark area on the tips more extensive; rectrices orange-cinnamon to 

 dark hazel, subterminally banded with fuscous-black and often with 

 some incomplete fuscous-black bars along the shaft. 



Adult. — Red phase (sexes alike) : Similar to the melanistic phase, 

 but with the feathers of the occiput, nape, and interscapulars edged 

 with orange-cinnamon; the scapulars and inner secondaries barred with 

 smoke gray, their tips often washed with buff; upper tail coverts 

 orange-cinnamon with fuscous-black shafts, and barred incompletely 

 with fuscous-black; remiges as in adult borealis; sides of head, chin, 

 and throat fuscous ; the breast and upper abdomen ocliraceous-salmon 

 to dark hazel, with black shaft streaks; abdomen and under tail 

 coverts like the breast, but barred with fuscous to chaetura drab; the 

 under tail coverts a little lighter; thighs like the breast and obscurely 

 or less broadly barred with fuscous; axillars and under wing coverts 

 cinnamon or buffy barred with fuscous. 



Adult. — Pale ("normal") phase (sexes ahke) : Similar to the adult 

 of borealis, but with the upper back averaging a little darker, more 

 blackish, the underparts usually with a definite wash of pale buff or 

 pale tawny, and with the thighs definitely barred with from cinnamon- 

 buff to orange-cinnamon; the rectrices often, but not always, with 

 incomplete accessory bands along the shaft; iris straw color, mottled 

 with brown to light sepia; orbital ridge olive-green; bill blackish, pale 

 bluish at base; cere greenish yellow; gape wax yellow; feet from dirty 

 pale yellow to deep chrome yellow. 



Juvenal. — Melanistic phase: Similar to the adult of this phase, 

 but with the tail dark grayish banded with blackish. 



Juvenal. — Pale "normal" phase (sexes alike): Similar to that of 

 borealis, but usually more abundantly spotted with fuscous-brown 



