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[[underlined]]Cyanerpes[[/underlined]], I [[circled]]78[[/circled]] April 19, 1958 Barro Colorado Nothing much new recently among the Blues. The white left ♂ still hasn't begun WS'ing yet. (The ♀'s are still being kept apart in a separate cage.) I am beginning to think this may be significant; as he does spend quite a bit of time flying back and forth in the aviary uttering calls. This afternoon he mostly uttered ordinary CN's (with head feathers very smooth rather than CR.) The blue left ♂ still sings from time to time; but it is obvious now, I think, that he sings much less than the 2 young birds I kept earlier. This may also be significant. I have been paying a little more attention to some of the vocal patterns of the Shinings too; and I am now quite certain that slow series of CN's can merge with the most rapid R's through any possible intermediate. The ♀ Shining did a peculiar "Wing flailing" performance yesterday. Started to give a lot of single CN's when a ♂ Blue came to visit; and each note was accompanied by a single, only moderately fast, "flail". The wings suddenly flicked out, and slightly down. Slightly spread. And then folded normally again. No trace of the up-and-down vibration of Qu. I rather imagine that this was just a slightly exaggerated form of ordinary WF.