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51

Aramides cajauea,  August 3, 1960, I 

I ran a very few tests on the two new chicks this afternoon, around 5:30 p.m. 

WH2 uttered moderately rapid series of short P's when following me. (Three times). Then uttered very short P's and chirp-like P's when poked.

WR2 Uttered the same type of P's as WH2 when following me. Then uttered accelerated "bubbling" bursts of short P's when poked. Each burst contained 4 or 5 individual P notes. These bursts were really quite reminiscent of trills.

It is interesting that WR2's behavior seems to be developing much more rapidly than that of WH2.
  
Aramides cajauea, I.  

August 5, 1960
Barro Colorado

I decided to take a look at the first brood, and run some tests, beginning at 7:00 a.m. this morning.

All 4 birds seem to be doing well.  Completely feathered, and legs already starting to turn pink, but still much smaller than adults.

When I first approached the cage, the 4 birds became quite vocal - as usual - but the notes they uttered were rather different from the ones they used to utter earlier in similar circumstances. This morning they uttered lots of P's, and a few AlP's, but few or no PP's!

The tests went as follows:

U:
Went into a silent SC posture when first approached. Remained silent when handled, at first. When the handling continued for several minutes, however, the bird uttered 2 LC notes, followed by 1 or 2 PP's, and