FAMILY FALCONroAE 277 



eye, bare except for scattered, slender, filamentous feathers, which 

 are arranged in a line from the bill down the center of the upper 

 neck, are scattered over the lores, and across the lower eyelid, and 

 form a stronger fringe along the free border of the upper eyelid; 

 lower border of breast, abdomen, flanks, tibia, and under tail coverts 



Fig. 48. — Red-throated caracara, cacao, Daptrius americanus americanus. 



white ; auricular region, and side of ujoper neck behind it, with the 

 feathers white basally, producing faint light lines (absent in some 

 specimens) ; elsewhere black, and a faint sheen of dull green. 



Immature birds are said to lack the light lines on the sides of the 

 head, but this is not certain. 



A male, taken at El Uracillo, Cocle, February 28, 1952, had the 

 iris deep red ; bill honey yellow ; cere, gape, and base of mandible 



