206 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



to recognize. Chapman (Life in an Air Castle, 1938, p. 126) saw 

 one capture an immature ani, but this must be unusual, as I have 

 never seen one show any interest in the abundant small birds when 

 these chance to appear near, and conversely the forest birds ordinarily 

 pay little or no attention to the hawks. The exceptions usually are 

 tropical kingbirds and Myiozetetes similis that pursue large birds of 

 any kind, even to turkey vultures that pass too near. 



BUTEO JAMAICENSIS (Gmelin): Red-tailed Hawk; Guaraguao 



Falco jamaicensis Gmelin, Syst. Nat., vol. 1, pt. 1, 1788, p. 266. (Jamaica.) 



This is a species found throughout North America, from near the 

 limit of tree growth in the far north south to Panama and the 

 Greater Antilles. In this extensive range 8 subspecies have been 

 recognized of which two are known from the Republic, one as a 

 resident in the mountains of Chiriqui and Veraguas and another as 

 a casual migrant. Details regarding these are covered under the two 

 headings that follow. 



BUTEO JAMAICENSIS COSTARICENSIS Ridgway 



Buteo borealis var. costaricensis Ridgway, in Baird, Brewer, and Ridgway, Hist. 

 N. Amer. Birds, Land Birds, vol. 3, 1874, pp. 258 (in key), 285. (Costa Rica.) 



A large, broad-winged hawk with rufous brown tail in the adult. 

 The inner webs of the four outermost primaries are incised toward 

 the tip. 



Description. — Length 470 to 570 mm. Adult, crown and hindneck 

 hair brown to black, with the concealed feather bases white ; rest of 

 upper surface blackish brown ; tail russet to cinnamon-brown, with a 

 narrow black subterminal band; upper tail coverts cinnamon, barred 

 irregularly with dusky, and tipped with white; sides of head, neck, 

 and upper breast hair brown, edged or washed with dull cinnamon ; 

 f oreneck and breast white, streaked lightly with hair brown ; abdo- 

 men, sides, flanks, and tibia cinnamon-brown; under tail coverts 

 cinnamon-buff ; tibia sometimes lightly barred with dull black ; under 

 wing coverts cinnamon-brown, becoming white on outer edge, with 

 the longest outermost coverts dusky neutral gray, forming a large, 

 prominent spot; under side of flight feathers dull white, freckled 

 with pale gray, tipped with dusky neutral gray, and with 2 or more 

 bars of the same color. There are two color phases, one that is 

 almost entirely white below, with a few cinnamon buff bars on the 

 tibia, and one that is more rufescent on the under surface than the 

 detailed description above. 



