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Tangara, Nov. 6, 1957 

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difference between the "high intensity CN" patterns of these two species. The golden-masked seems to lack the Trill of the Plain completely. It utters an accelerated series of notes when it flies off; but this is not differentiated into a morphologically distinct pattern.

Tangara, I 

          
November 11, 1957
Rio Chagres

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Today I heard, for the first time, what may have been the "song" of the Plain Tanager. By a bird feeding in Cecropia trees. From a quite unritualized posture, apparently with food in bill. Just a series of notes: "Whee whee whee whee whee whee whee whee whee whee" or "Whoo whoo...."

Tangara I

November 17, 1957,
Barro Colorado 

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During an apparent dispute over food (Cecropia fruit) one of the Plain Tanagers did definite G.

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It is my impression that not only are the Golden-masked Tanagers much less gregarious than the Plains (tending to go about in pairs rather than larger groups), but they also tend to ignore the Plains (much more so than the Blue or Palm Tanagers) I have just been watching a pair of Golden-Masks feeding quite peacefully and at length in an orange tree,

Transcription Notes:
[[Grey color]] = Plain Tanager = inornata [[Blue color]] = Golden-masked Tanager = larvata