BIRDS OF NORTH AND MIDDLE AMERICA 



13 



Immature. — Entire iipperparts, including wings and tail and even 

 the bare skin of tlie head, fuscous to fuscous-black, the individual 

 feathers of the back, the upper wing coverts and upper tail coverts 

 vaguely margined with fuscous-brown, the outer primaries externally 

 narrowly edged with whitish; breast abdomen, sides, flanks, and 

 under tail coverts white; under wing coverts mixed white and 

 fuscous, axillars white. 



Figure 1.- — Sarcoramphus papa. 



Bill whitish horn color, lighter distally; feet (in dried skins) dark 

 earth brown. 



Juvenal. — Similar to immature, but with the enthe underparts 

 dark fuscous like the upperparts; some specimens with a slight mixture 

 of whitish on the abdomen (probably early stages of molt into imma- 

 ture plumage) ; bill and feet (as far as may be judged from dried skins) 

 as in immature. 



Downy young. — None seen; no descriptions found except a figure 

 (Proc. Zool. Soc. London, 1894, 163) which suggests white or whitish 

 down everywhere but on the bare head and feet. 



