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[[circled]] 8 [[circled]] Tangara, I. January 23, 1958 Barro Colorado [[Left margin]] [[3 blue vertical lines; 1 blue cross-hatched vertical line]] [[/Left margin]] An apparent pair of Golden-masks, feeding in bushes uttering lots of CN's, in ones, twos, or threes- but never very fast, or in real bursts. Then become slightly separated. Both continue CN's as before, but one of them (unfortunately, of course, the one I can't see behind leaves) also utters about 4 or 5 long R's (just as described above). This appeared to be comparable to the WS of the Thraupis tanagers, insofar as it appeared to be confined to one sex, presumably the [[male symbol]], and used as an attempt to "call in" the mate [[Left margin]] [[3 blue vertical lines; 1 blue cross-hatched vertical line]] [[/Left margin]] Then both birds flew off, uttering a series of CN's. This included more notes, uttered more rapidly, than any series of CN's uttered while the 2 birds were still feeding in the bushes, but fewer notes, uttered more slowly, than the "syllables" of a real R. [[Left margin]] [[3 gray vertical lines; 1 gray cross-hatched vertical line]] [[/Left margin]] I am beginning to think that the Plains don't have a "real" R. [[Left margin]] [[3 gray vertical lines; 1 gray cross-hatched vertical line]] [[/Left margin]] There was a furious fight between 2 Plains this morning, during which they fell out of the tree in which they had been feeding. When they first came to grips, one or both uttered a few notes like ordinary CN's, but louder and sharper (but not hoarser like the HAC of so many species). This continued into a series of ordinary CN's as the 2 birds separated and flew apart. Tangara, I February 1, 1958 [[Left margin]] [[3 gray vertical lines; 1 gray cross-hatched vertical line]] [[/Left margin]] Lots and lots of supplanting attacks in a flock of feeding Plains this morning. Some led to aerial chases. The most interesting aspect
