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14 Rhamphocelus, Mar. 9, 1958, III dictate that these "Wheets" cannot be Alarm Calls. The orange left female is now beginning to show some aggressiveness whenever the lavender right female lands beside it closely. All G patterns. Sometimes the G is just given from an ordinary "semi-fluffed" relaxed posture. Sometimes it is given from a Crouch Posture, apparently just like that of the Sangre de Toros (like the posture drawn Mar. 8, p. 12, but probably without the tail lifted so high). But still no MCN or WhN. I wonder why? I also wonder if this C Posture might possibly tend to link the tanagers with the Euphonias ???? Rhamphocelus, I March 11, 1958 Barro Colorado A female Sangre de Toro which I saw at Frijoles yesterday uttered MCN's from a semi-C posture with bill very wide open. (I think kept more or less open throughout several notes). This seems to be intermediate between the ordinary MCN pattern I have watched the captive male do so much, and the ordinary G pattern. Rhamphocelus, I March 12, 1958 Barro Colorado The Yellow-rumps seem to have a form of R. I have heard it 4 or 5 times now. Always very brief. When one Yellow-rump gets too close to the other, or a Sangre de Toro gets too close to a Yellow-rump
Transcription Notes:
Euphonias