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33

Ramphocelus, May 17, 1958, II        

A few singing performances were more elaborate. In some cases, a series of WS phrases was immediately preceded by a burst MCN's - of the WhN type, definitely not the HAC type. These is no doubt but that there is a definite characteristic rhythm to their MCN's (and all MCN's of all types, I think), but it is difficult to catch and describe. Sometimes 2 note series [[image- 2 lines drawn here]]. Sometimes 3 or 4 note series [[image- 4 lines drawn here]] ?
I am now fairly certain that this is strictly homologous with the Tss - Φ performances of the Yellow-rumps described on Apr. 26, p. 24.

There seemed to be absolutely no difference between the movements and postures accompanying this WhN "song" and those accompanying WS song.

Both types, as usual, given when the was sitting alone, isolated by itself in a corner - without provoking any response by any other bird.

After looking at these WS performances, I think that the peculiar performance of the male Yellow-rump described on Apr. 28, p. 28, may have been the WS of that species.


Ramphocelus, I            

October 24, 1958
Bronx Zoo

[[image- oranges cross-hash marks]] = (flauimigerus?) =Orange-backed Tanagers. There is single adult male in a big inside cage, with quite a lot of other birds of other species.

In general appearance, proportions, color, etc., this bird looks exactly like the Yellow-rumps - except for the different color of the rump.