Viewing page 44 of 92

This transcription has been completed. Contact us with corrections.

[[circled]] 24 [[/circled]]
[[underline]] Ateles [[/underline]] ssp., Jun 24, 1959, VII

[[image -  3 vertical red lines with a red hash mark going down the page in the left margin]] 

When I pick her up in my hand, she utters two difficult kinds of notes very frequently. One is a short, loud, hoarse scream, beginning and ending quite abruptly. Sometimes these screams are repeated, but they never, "run together", and they are never organized into elaborate call performances of many notes.  Where screams are probably quite aggressive, probably strictly homologous with the (probably low to moderate intensity) Screams of other species. 
The other common call she gives is a note which is similar to the Scream in length, and abrupt starting & ending, but is really a shrill loud whistle. I shall call this WW. It is often associated or alternated with typical Screams (and several WW's may be uttered in the same sorts of series as typical Screams). In many ways, the WW would appear to be a sort of "segregated variant" of the Scream. Either lower intensity and/or less aggressive.
The only other call the Red [[female symbol]] gives frequently is a Trill call.  This sometimes sounds like a S Trill of other species. More often it is rather more like the Scream in tonal quality.  Quite hoarse.  Often rather low pitched But never hollow - or wooden - sounding. This [[female symbol]] utters quite a lot of these trill's when I just pick her up in my hand; but they seem to be much less common in such circumstances than either the Screams or the WW's. When I pick the [[female symbol]] up and take her toward the cage of the other 4 Spider where she can see them plainly, she always utters Trill after Trill, one right after the other, with very few or no Screams or WW's. This would suggest that her Trill's may be produced by some sort of frustrated gregarious or filial motivation, with relatively little (or possibly nothing?) in the way of hostility.
Several times I have heard the Red [[female symbol]] utter 1 or 2 obvious B Notes when I held her in my hand. Rather deep & sonorous. Probably