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7

Pezopetes,(underlined)Oct. 4,1960, IV  

I presume that all or most of all or most of these variable "songs" were produced by some pairing and/or sexual motivation.
 
All these vocal patterns, the "songs" and the "greetings" would seem to confirm the relationship between Pezopetes and Altapetes. 


Pezopetes, I 

October 8,1960
Cerro Punta 

When I arrived just below the upper pasture at 6:30 a.m. this morning, I heard a Pezopetes uttering a whole series of LW's, or something very similar, from a hedge. The notes were uttered quite rapidly, one right after the other. All or most of the notes were quite like the LW's I heard on Oct. 4th, but it was obvious today that most of the notes descended in pitch at the end. Comme ca: "Seeeeeeeoooooo" or "Seeeeeeee-eeee-ooo"                                               [[image - curved lines drawn under these notes]]. (It is possible that the LW's I heard on Oct. 4 also descended in pitch at the end. I may have made a mistake in transcribing them.) Most of the LW's I heard today were obviously either bi-syllabic or tri-syllabic, but I couldn't tell if three was any really significant different between the two types - they seemed to be jumbled together in perfectly random fashion. Every once in a while, however, the bird would utter a completely monosyllabic, and relatively short (Seeeeeeeee")Note in the middle of the other notes. Such monosyllabic notes are presumably the lowest intensity form of LW.

The bird stopped singing about 5 minutes after I arrived. So I presume that this series of LW's was really a form of "dawn song" like that of other bush finches.

Unfortunately, I was never able to see the bird while it was uttering the LW's, but it was certainly almost or completely stationary throughout