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(?) major, (underlined)    May 5, 1960, II             26

first sounds I have heard him utter in a long, long time. These DN's were quite harsh-sounding & lower pitched than the DN's of M. Presumably eventually DN's still.
  I should add that the comparative silence of Hrr may not really be due to the fact that he is female while M is male. Hrr has always been less fixated on us than is M. Hrr has never followed well. Hrr is also much more timid than M. Hrr always been much more prove to crouch & perform TVC.

(?) major,(underlined) I.      May 11, 1960
                               Barro Colorado

  Still no apparent change in the behavior of the birds. This morning, when I crooned "Oooo" sounds, M went through her whole repertory of reactions to such sounds, Tsh's, preening, ruffling, general shakes, and (?). Even did one BW movement. Hrr also reacted strongly, but no quite as much so as M. Just Tsh-ing and preening.

 (?) major, (underlined) I.     May 16, 1960
                            Barro, Colorado

  Only one apparent change in the behavior of the birds today.  They are now quite reluctant to follow me. When I call, or walk
past them, they turn their heads to look at me, and sometimes walk a few steps toward )or after) me, but they don't run toward me in the enthusiastic way they did when they were small. This comparatively slight response is probably not much of a change in the case