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12
Ramphocelus, Mar. 8, 1958, II            

The female Yellow-rump tends to sit placidly in a more or less semi-erect posture. She doesn't stand in the breast down, tail partly raised, posture (rather like the one drawn on Jan. 30, p.6, but with neck less stretched upward, and tail inclined slightly more upward) which is so characteristic of the Sangre de Toros.

There are still quite a lot of disputes between the male and female Sangre de Toros. These tend to begin with pecking, then go into MCN's in a crouched posture,"declining" into G in a crouched posture. This crouched posture (C) is more or less comme ça:

[[image - sketch of a bird]]

The inside of the mouth is a rather bright pink, and this is often quite conspicuous. The C drawn here is the posture assumed by the female crouching along a large branch. I should not be surprised if the posture itself is relatively little ritualized as the same sort of fluffing & G can occur when a bird is clinging vertically to the side of the cage (see Jan. 30, p.5).
  

Ramphocelus, I

March 9, 1958
Barro Colorado

I caught 2 more female Yellow-rumps this morning. Let one go and put the other in the aviary. Banded lavender right. She has behaved just like the other one (and there has been no fighting between the 2) except that she seems a little more nervous and flies around more.