Viewing page 575 of 751

This transcription has been completed. Contact us with corrections.

9

Darnis, I 

March 12, 1961 
Barro Colorado

The pair A birds died a long time ago. About a month ago, I got a pair of adult birds [[male symbol]] & [fe[male symbol]], and an apparently juvenile male, in process of molting from juvenile to adult plumage. (I think his molt maybe delayed, because he has been in captivity for some time, but he must be at least fairly young.) The adult [[male symbol]] escaped somehow. So I was left with the adult [[female symbol]] and the young [[male symbol]]. I shall call these birds "B [[female symbol]]" and "B [[male symbol]]."  I have kept them separate, one in each side of a long, cage (inside the animal house.) Separated from one another by a partition. This morning I removed the partition, and let the 2 birds together for about an hour. Then separated them again.

When I first let the 2 birds together, they were very excited. Flying back and forth very rapidly.  Uttering lots of single CN's. Lots of Flicking movements. Lots of "Song." Lots of BW. Lots of "Bowing."Lots of Lt (?) Postures without Bowing. Some fighting.

Both birds uttered lots of CN's as they flew around the cage. Sometimes repeated very rapidly, but never accelerated into a trill or rattle, or organized into any more complex socialization. All these CN's seemed to be eventually "Tsit"s. Quite loud & hard. Possibly sometimes a little like "Treet." As far as I could tell, the individual CN's uttered during this encounter were eventually the same as those uttered by both birds earlier when they moved about their cages when they were still separated. But neither bird ever uttered as many CN's as rapidly when alone.As far as I can tell, ,the CN's of [[female symbol]] and [[male symbol]] (both juvenile & adult) Blue Darnis are all the same in sound.

Some of the CN's were uttered during Lt (?) Postures and/or Bowing