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Atlapetes, Mar 3, 1959, II 

very much softer, while it was looking at me rather nervously. It is possible — I suppose — that the "warble" followed by "trill" I heard earlier may have been something of the same sort. 

Both these vocalizations seemed to be given from perfectly unritualized sitting postures 

Atlapetes, I 

March 6, 1959
Cerro Punta

We got a very good view of a chestnut-capped Bush-finch singing this morning. Couldn't see what started it off. When we did see the bird, it was sitting in a low bush, about 1 or 2 ft off the ground, singing apparently by itself. The song itself was a long, rather soft, whistled phrase The phrases were repeated again & again for at least a minute, possibly more They were also quite variable A "typical" phrase may have been more or less comme ça.

"Tut tut tut-teeee tut-teeee teeee"

I think that the number of introductory "Tut"s varied from time to time; and it is possible that one or two were occasionally inserted later in the phrase I also think that the number of doublets, "tut-teeee" was somewhat variable, some phrases perhaps including 3. In any case, the main part of the phrase apparently always consisted of doublets and all the phrases ended with a singlet "teee".

This song was given while the bird sat in an ordinary sitting posture—with crest very much raised (CR), and throat feathers at least moderately fluffed. 

The bird just disappeared from view after it stopped singing

Transcription Notes:
The correct spelling is Atlapetes, NOT Altapetes.