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Cyanerpes, Nov. 6, 1957; II. 7

I noticed today that extreme CR by the captive ♂ may me accompanied by slight ruffling of throat feathers.

Cyanerpes, I November 11, 1957, Barro Colorado

Not much new to report; but there have been a lot of wild ♂'s (at least two in perfect plumage, and two in molt) which come to watch the captive ♂. Sometimes (most often, in fact) just sit and peer intently.
One ♂ in full nuptial plumage sat on top of the cage for 15 minutes, uttering constant "pure" CN's at regular two or three second intervals. (I didn't get a good look at him, but I am fairly certain he just sat with CR's). Then, when I approached, he flew up in tree and began to give a whole series of equally "single" but rapid "harsh" or "wheezing" CN's (HCN). Does this mean that the HCN's contain a stronger escape component than the other CN's. I rather think so.
I have also seen the same or another ♂ in perfect plumage give a whole series of HCN's from the tree when I was sitting quietly beside the cage. I did notice that this ♂ never did CR. This might confirm the "anxiety" nature of the HCN's; and it might also suggest that the CR contains at least an
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