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12

Tangera I

March 3, 1958
Barro Colorado

Watching a few Plains in trees. Several  pronounced G's before attack.
Also one bird stood several times in a completely [?] posture; but with drooping & fluttering wings. This looked rather like the wing-fluttering which precedes general [?] in such species as the Shining Honeycreeper; but it apparently provoked other birds in the flock (at least 3, one right after the other, to fly toward the fluttering bird. The flutterer retreated each time; and so nothing developed. Was sex involved in this??

Tangara, I
March 22, 1958
Barro Colorado

I have been looking around to see if any of these Tanagers do anything which might be the equivalent of the "song"s of other species. The only thing I have seen was one case of a solitary male (perhaps one of the birds of a pair which hangs around the clearing here) Golden-mask which gave repeated R's one day while perched on the topmost twig of a bare tree.
But I have certainly seen plenty of cases in which one bird of a pair appeared to be quite unmoved when its mate flew away.
And I have not yet been able to distinguish any [?] of PCN in either the Plains or the Golden-masks.