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Atlapetes, Mar. 31, 1960, II. 

looked almost like "panting," but the bird had certainly not been struggling enough to cause such prolonged and vigorous panting. So I think that it must have been a ritualized pattern. Perhaps the equivalent of the HAC of most tanagers? (Perhaps correlated with the fact that the members of a pair always stick very close to one another and separate pairs usually stay far apart.)
   
We caught the second bird (presumably the [[female symbol]]) sometime after catching the first. When we put the second bird into a paper bag with the first, there was a sudden burst of moderately soft, twittering, "formless", warbling song from the bag. Quite reminiscent of the Yellow-thighs!! Another indication that Atlapetes and Pselliophorus are related.

I also caught a Chestnut capped (briefly, before it got away). It was also quite silent when handled. 

       
Atlapetes, I. 
   
May 21, 1960 
Cerro Pichincha                                      
   
This morning we watched a single rufinucha sitting high on a bare twig at the top of a tall tree, singing repeatedly. Presumably [[male symbol]].
   
His songs were most distinctive. A single phrase, very frequently repeated at intervals of a few minutes or seconds. All his song phrases this morning were essentially identical, but quite different from any songs I have heard from this species before. A single phrase might be represented as follows:
   
Cheeoo  Cheeoo  Cheeoo Chuh Chuh

[[image - five dashes of varying length]]