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Cyanerpes, Nov. 5, 1957, II. 6 upwards (sometimes almost vertically), head more or less pulled back, and neck more or less stretched upward ―i.e. in postures quite reminiscent of typical BU. This whole performance looked quite high intensity; so perhaps the G is as high intensity as, or even higher than, the Wh, only containing a stronger escape element. [[image]] Extreme "retreat BU" by ♀ with G. I also saw some more typical "friendly" BU's with Wh, directed by the ♀ at the ♂ [[underline]] Cyanerpes [[/underline]]. These were with slight CR; but much less than most of the corresponding performances by the ♂. The ♂ has CR almost constantly while I am watching him and/or any other bird is nearby. Cyanerpes, I November 6, 1957 Barro Colorado I have now put the 2 birds in the outside aviary. They attract another ♂, in full breeding plumage, who just sits for hours, looking at them, with constant CR. No trace of song.
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