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Atlapetes, May 25, 1960, III.

After this bird left, there was at least one, and possibly two, birds left in the bush who continued to utter a few of the HAC-type notes and "Teeoo" or "Cheeoo" notes.

It is possible, therefore, that this incident was a territorial boundary dispute between neighboring rufinuchas.

Atlapetes, I

May 26, 1960
Cerro Atacaso

We arrived at the usual place here just at dawn, before sunrise. At that time, there was a simply terrific "dawn chorus" of Yellow bellies in progress. A bird singing every 10 or 20 yards. Usually moderately low in tall bushes or at the top of low bushes (it may be significant, in this connection, that it was very windy this morning.)

I was only able to see one bird singing. It was in a posture comme ça

[[image - drawing of bird]]
Crest quite raised.

I couldn't see the wings very well; but they certainly weren't drooped very conspicuously. 

The bird didn't seem to be very fluffed either.

All the songs uttered by all the birds were remarkably standardized. A typical song phrase might be represented as follows.  "Chip Cheeoo-cheeoo-cheeoo [[jagged line]]" The pitch of a typical