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97

Mixed Diglossini, Apr, 26, 1965, IV

[[margin]] Humer [[/margin]] 
As this bird continues singing, some of its phrases become slightly longer. And become twitter-R-twitter-R!!! This is quite reminiscent of the bipartite phrases BQ's in Mérida (and up above Guasca?).

Leaving 5:25 pm.

COMMENT AND CORRECTION

[[margin]] Bari  Humer [[/margin]]
I think that my earlier comments on Bari-Humer relations may be a little vague- and somewhat misleading, There seems to be considerable individual variation among the Humers. (I have no evidence about individual variation in Baris.) It probably is true that Humers never attack Baris as frequently, rapidly, or vigorously as they do other Humers. But some of them come very close to doing so. The Humers who "own" the Red Abu in Garden #3, for instance, apparently always tend to approach the male Bari as soon as he starts to feed on the Red Abu, and they almost always supplant him sooner or later (usually sooner.) Some of the Humers in Garden #1, by contrast, will allow Baris (both male and female) to feed quite close by, without, apparently paying any attention. And they may do so with some appreciable actual frequency.

April 27, 1965
Mts above Bogotá

Arrive lower spot, Guadelupe, 5:25 am. Still quite dark.

There is a fair amount of bird noise 5:30. Wrens and Atlapetes Whistle Songs.

Hear first twitters in distance 5:32 am. Soon stops. There has been really very little in the way of diglossine vocalization so far 5:47