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28

Aramides cajauea, July 7, 1960, II      

hostility between the chicks. If so, they were the only indication of such hostility this evening. At no time this evening did the chicks ever peck at one another in an aggressive manner.

I also ran a series of tests on WB this evening. 

WB. Uttered chirps when handled.

Silent when first isolated in a shallow box. Jumps out. Put back inbox, jumps out again. All quite silent. Finally begins to utter LC notes after jumping stops. 
 
Repeatedly performed Tsh's as "greeting", when I talked to it (while it remained isolated in the box). A single Tsh each time I said "Hello". Some, but not all, of these Tsh's were accompanied by TW. All these movements were quite silent. Then, when I uttered "Hello" again, once,if uttered a single undistinctive peep, without any movements.. Then, when I uttered more "Hello"s, it resumes performing Tsh's, with or without TW's, as greeting each time, and all these later Tsh's were also silent.  Finally, when I stop saying "Hello"s, the Tsh's continue for a few seconds, and then develop into complete preening.

WB then followed me twice, quite well.  Uttered a form of RP during this following. Quite like the RP of other birds I tested yesterday and earlier, but the individual notes were somewhat longer. It then uttered the same form of RP when running away from me. 

Several times, when I approached WB (on the floor) slowly during this series of experiments, it assumed a silent SC posture - exactly like the posture drawn above on July 5, p.20. Usually momentary, followed by relaxation or running away. It also assumed the same SC once when a bat flew particularly close to it.

When I frightened WB by stomping my foot, it always ran