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18

Dacnis, Mar. 13, 1961, II                
            

remarkably reminiscent of Palm and Blue Tanagers! 

Dacnis, I.  

March 22, 1961
Barro Colorado

I let the B birds together again this evening, shortly before sunset. They reacted in much the same way as on March 12, but much less vigorously.

Both birds began Bowing, and uttering CN's and songs, immediately. But then they quieted down fairly rapidly.

Some of the Songs were nothing more than "Int tsoo wee." Presumably a low intensity but complete version of Song. I don't know if there is any motivational or functional difference between Songs ending in "Troowee" and Songs ending in "Treewooo." Possibly the latter are more strongly hostile. "Wooo" sounds sometimes have an HAC-like quality.

Most of the Bowing consisted of alternate postures comme ça:

Presumably moderately low intensity.

[[images - two birds]] 

Some of the Bowing and Songs were certainly completely synchronized.  

There was one brief but vigorous contact fight, in the air, between the 2 birds shortly after they came together. Almost completely silent. No HAC. Only a few single, quite ordinary sounding CN's. This would indicate that some or all of the CN's are at least part, host-