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8

Aramides cacanea, I
       
June 19, 1960
Barro Colorado

This afternoon I noticed that all four birds uttered Trll's when they were feeding all together in a rather compact little group, with some jostling. Later on, they uttered Peeps when huddled together, preparatory to sleeping.

This evening I ran the same series of tests as yesterday, and also let each bird follow me (alone, without being able to see any of the other birds. The results were as follows:

U. Quite silent when handled roughly. Then uttered Peeps when following me. Then uttered Peeps when isolated! Their Peeps when isolated were not continuous, U would stand silently for a while, then utter a few Peeps, then fall silent again, etc. etc. It was particularly apt to utter a few Peeps when isolated when it could hear my voice, when I called to it after a few minutes or seconds of silence. After it had been isolated for quite a while, U uttered a few, not very loud, LC Notes in addition to Peeps. Then it uttered more Peeps when frightened. Finally, it uttered Trlls when poked (their Trlls were particularly similar to Peeps in general effect).

WH. I picked up WH and handled it particularly roughly. It uttered several chirps, and then 1 Peep and 1 LC Note, during this handling. Then it uttered more chirps as I continued to handle it. Then it uttered a few LC Notes (not very loud and by no means continuously) when isolated. This is all the testing of WH we did tonight, as it see to have developed a limp.

WB. Uttered one or two chirps when handled. Then uttered Peeps when following me. Then remained quite silent when isolated. Then uttered