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Mixed Diglossini, Apr. 15, 1965, V   40



[[left margin]] Humer [[left margin]]
contrast with the situation this morning, when the Humers were spread all over the trees (even, perhaps, favoring the opposite side). I.E. the Humers definitely are sticking together (although probably only because they want to attack one another).  

[[left margin]] Humer [[left margin]]
Most of the time, there was no indication that the Humers were organized in pairs or family groups. Only one possible exception. Sometimes, when one bird chased another, a third bird would follow behind the pursuer and pursued. This third bird might have been the mate of one of the others. 

[[left margin]] Humer? Laf? [[left margin]]
This afternoon, at least one bird in the Eucalypts uttered a lot of hoarse "Zaa" or "Zhah" notes. And one individual, probably the same, uttered a number of "Seeet"s. “Zaa" type notes apparently correlated with chases "Seeet"s uttered in flight. This individual might have been a juvenile Humer or, perhaps, more probably, a Laf. (Certainly I never saw a bird which I was sure was in Juvenal plumage.) 

[[left margin]] Humer? Laf? [[left margin]]
If there was a Laf in these trees, it probably supplanted a Humer at least once. 

(I heard a few "Zaa" type notes this morning – but many fewer than this afternoon.)

COMMENTS:
[[left margin]] Gen [[/left margin]]
I. I am sure of my identifications of the "Coers" and most of the "Humers" in the preceding account. But I am dubious about my identification of "Cys", and the possible presence of one or more Lafs. 

II. Certainly there were no Albis, Baris, or Conirostrum spp. in the Eucalypts while I watched them today. 

 III. It is obvious that the "parasitic" or "semi-parasitic" species

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