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[[circled]] 20 [[/circled]]

Tangara, I     

August 23, 1958
Cerro Campana

[[three yellow lines and hatch down whole left margin]]
Watching more Silver throats today. An adult with fully-fledged young. Usual CN of adult as usual. Also gave shorter sharper single notes, apparently as ALCN's. 

The apparently lowest intensity "version" of the ordinary CN is a thin very weak "Trip", without any harsh or buzz quality. Perhaps I should give this another name: "TCN"

The young bird begged for food, and was fed, several times. This begging took the usual passerine form. Q plus FB notes Qu was quite conventional - except that the wings were hardly extended at all. Just lifted a little out of the supporting feathers. And the carpal joint, sometimes at least, lifted as much or more than the primaries. FB call an irregular series of notes, up to 4 or 5 at a time, in a single series. Length of individual notes extremely variable. "Waaaauh waauh...." or "Taaauh taaaaauh..." Rather hoarse. Less cicada-like than the ordinary CN's of adults

Later on, in the afternoon, I got a chance to see more FB by the same bird. I am now sure that the usual FB call is comme ça: [[3 horizontal lines, in decreasing length and height]]. And the primaries are held out more than the carpi during Q. But this is seldom or, more probably, never vibrated. 

Tangara, I    

August 30, 1958
Cerro Campana