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[[underlined]]Cyanerpes[[/underlined]], I. [[circled]]76[[/circled]]
April 12, 1958
Barro Colorado

I took the 2 ♀ Blues out of the large aviary this noon, and put them in a small cage about 15 or 20 ft away from the aviary — just to see what the ♂'s would.

The blue left ♂ first began by flying back and forth along the side of the aviary nearest to the ♀'s cage. He uttered quite a lot of ordinary CN's during this. All these CN's seemed to be [[underlined]]without[[/underlined]] any trace of CR. Then, gradually, as the afternoon wore on, this blue left ♂ began to spend more time flying back and forth along the length of the aviary (from the side near the ♀'s to the side away from them and back, etc. etc.) in a rather excited manner. [[underlined]]This was accompanied by lots & lots of WS's[[/underlined]]. (Mostly during the brief intervals when the ♂ perched on the far side, [[underlined]]away[[/underlined]] from the ♀'s). The sound of this WS was more or less similar or identical with the WS's of the young birds I used to have. A soft prolonged warble. Usually introduced, and almost always followed, by [[underlined]]HCN's[[/underlined]]. (Also a lot of HCN's uttered when this ♂ was flying about in the intervals between WS's). His WS was uttered from a rather different posture from that in which the young birds gave their WS's He gave his in quite sleek (i.e. no CR or fluffing of body feathers) pre-flight, rather alert, postures

Whenever this ♂ seemed to be particularly highly motivated, ie. when he was flying about most excitedly and giving WS's most frequently, the WS's became louder — but I still find it difficult to believe that they could ever carry further than about 20 yds — at best
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