FAMILY CAPRIMULGIDAE 213 



CAPRIMULGUS CAROLINENSIS Gmelin: 

 Chuck-will's-widow, Guabairo 



Figure 35 



Capritnulgus carolinensis Gmelin, Syst. Nat., vol. 1, pt. 2, 1789, p. 1028. (South 

 Carolina.) 



The largest species of the family found in Panama, in color dark 

 buffy brown. 



Description. — Length 270-300 mm. Differs from all related species 

 in having lateral filaments on the basal half of the rictal bristles. 

 Male, above brown, grayer on tertials and scapulars, very finely 

 vermiculated with black mixed slightly with buff; crown and back 

 streaked with black ; tertials and greater wing coverts heavily spotted 

 with black ; lesser wing coverts black, dotted with buff ; primaries black, 



Figure 35. — Outline of head of Chuck-will's-widow, guaibaro, Capritnulgus 

 carolinensis, to show fringed rictal bristles. 



heavily barred with tawny ; central rectrices barred and dotted indis- 

 tinctly with black ; 3 outer pairs extensively white or buff ; side of 

 head and upper throat clay color, barred with dusky ; a band of white 

 or buff across foreneck ; breast mottled, like back, with white or buff 

 spots in the center; abdomen, under tail coverts, and under wing 

 coverts cinnamon-buff, barred with dusky. 



Female, somewhat paler; outer tail feathers tipped narrowly with 

 deep buff to tawny, without extensive white or buff markings. (Some 

 males, apparently immature, have the pattern of the tail like that of 

 females.) 



Measurements. — (From Ridgway, loc. cit., pp. 507-508). Males, 

 wing 206.5-225 (213.9), tail 138.5-151 (144.1), tarsus 17.5-19 (18.4) 

 mm. 



Females, wing 201.5-215 (209), tail 130-144 (136.4), tarsus 17-19 

 (17.9) mm. 



Migrant from the north. Found occasionally throughout forested 



