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Cyanerpes, Nov. 17, 1957, II. 9

permanent CR, only interrupted when it gave an occasional HCN and smoothed down its crown feathers, momentarily, at the same time.
This is certainly the most highly social of the tanagers around here, with the probable exception of the Jaugara species. These little wandering flocks of ♂'s tend to move around as a unit. One bird flying off tends to set the others off too. (And the sudden departure of one or more of the wild birds, also sets off the captive birds, who try to follow)
It should be stressed that these mobile flocks, at least as they appear near the aviary, are almost always composed of ♂'s only. I have seen only one wild ♀ come near the captive birds; and I am not sure that she was "really" part of a flock.
The most peculiar aspect of the lack of display by visiting birds and the captive birds while being visited is that they are quite obviously greatly "excited." The captive birds tend to dash madly back & forth (particularly the ♂); and the wild ♂'s make constant little rallies toward & away from the aviary, or sit obviously torn by conflicting desires.