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61

Aramides cajauea, Aug. 23, 1960, III.  

- both "infantile" chirps and squawk-like chirps - now.)

Then the bird was put in the isolation box. Stayed in a for a couple of minutes. Quite silent throughout. Then flew out silently.

Then gave chirps, accompanied by escape movements, when poked. I finally left it alone and walked away. It continued to run back and forth along the side of the cage, obviously trying to escape, but uttered clucks instead of chirps. Occasionally performed a few ck Movements.

The transition between chirps and clucks during this last incident. This would suggest that the clucks of this bird (probably unlike those of U- see above) are already well segregated from chirps.

WR.
Runs away, uttering clucks, when approached.

Silent when handled.

Then let loose in cage by itself. Uttered loud squawk-like chirp when poked, then ran away. Again, uttered squawk-like chirps and ran away when I approached it. Then switched abruptly to clucks when I stopped approaching, but continued escape movements as before. After a few seconds, it fell silent, still continuing escape movements with individualized vigor!

These chicks can now be distinguished from one another by the following characteristics:

WH = black tail & mal occlusion
WB = lightest band on tail - band most nearly terminal
WR = darker band on tail- band less nearly terminal
U = dark tail with concealed gray band at base.