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21

Ramphocelus, Apr. 23, 1958, II               

and just looking up. And yet some of the (?) postures this afternoon were remarkably extreme - more so than the one drawn on Jan. 30, p. 7. Head & bill at least vertical. I am certainly not sure that, even if the (?) is a display as such, it is a hostile display - although I think it must be.

[[image - sketch of bird with its neck stretched upward]]

Tail perhaps not really as high as drawn

Aside from this long visit today, there was only one at her reaction of interest. The black left bird is becoming more and more aggressive toward the smaller birds in the aviary. It may be significant that it tends to concentrate its attacks on the poor little adult male Yellow-bellied feed eater, i.e. the other species with a dark head & a conspicuous white bill. The fact that the Sagre de Toro definitely selects the feed-eater as its victim is quite obvious - as is the fact that the feed-eater is doing nothing to provoke the attacks.


Ramphocelus, I            

April 26, 1958
Rio (?), Darien

Lots of Yellow-rumps around. Females and males just (?) (?) into adult plumage, (presumably also some young males in immature plumage still, but I can't recognize these). Occasionally apparently single birds flying around by themselves, but