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[[circled]] 15 [[/circled]]

Tangara, Aug. 2, 1958, III

do look as if they were purely flight intention or contact notes. No link with overt hostility so far.

The visiting wild bird flew up to the tree over the aviary after uttering its particularly harsh CN's., and sat there for a long time, alternating a few single ordinary CN's with R after R after R. These R's are definitely less "hard" than the CN's sound almost exactly like the Trll's of the Yellow-faced Granquit[[?]] (or the CN Trll's of the Plains, of course.) This bird didn't seem to be overwhelmingly upset by my presence; no this incident may confirm the theory that the R's of this species are used to "call in" companions (this bird may well have been the mate and/or parents of the captive birds). 

I may have to revise my opinions of the Plain's notes a little. The captive birds have done little or no single CN's!!! They give CN Trll's instead — even apparently at the very lowest intensities — when they just give very short Trll's!


Tangara, I 
                                        
August 5, 1958
Barro, Colorado

One further indication that the CN Trll's of the Plains are due to "frustrated flying drive": I have noticed that the birds are particularly apt to give more and more high intensity CN Trll's when they are perched on a twig just above the food dish — obviously torn by contradictory desires to go down & feed and fear of my presence not too far away.

Transcription Notes:
- In previous pages "Trill" is clearly written, whereas "Trll" is used throughout this page. Unsure of what to do regarding consistency vs. accuracy.