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Cyanerpes, Nov. 3, 1957, IV. 4 species (i.e. the Wh-BU complex) looks as if it might turn out to be not unlike A&H's description of [[underline]] Emberiza [[/underline]]! Now I just saw a nice case of the complete Wh & BU & Wing-quivering (Qu) performance of the ♂, when the ♀ landed beside him. Very fluffed underneath Tail raised obliquely, quite high. Only momentary about as low as the wing ever got → [[image - pencil bird drawing]] Cyanerpes, I November 4, 1957 Barro Colorado I may have to modify my previous description of the CN a little. It is not always harsh. Sometimes, perhaps usually, quite clear. Almost always loud. Increases in frequency when the birds move about more. But always really single notes ― so far. I rather think that the clearer CN's contain a stronger escape element than the harsher ones. What one would expect I suppose. During a dispute this morning, I saw the ♀ adopt a brief and not extreme BU with definite CR. This is the first time I have been sure of this last component in her case. Looked just like the ♂'s CR. There is no doubt, however, but that
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