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Apparently alone. Utter lots of LSN's, short W's, intermediate W-SN's, and "twitters" of high hard SN's. Disappear almost immediately. 
Tamarins certainly are very shy here - much shyer than in the Caquetá. this may help to explain why Trll's are comparatively rare here. These animals have comparatively very strong escape drives and very weak attack drives.
Still very cloudy an dark 8:30 am.
Then see still more tamarins in rain. This incident is described below at end of today's notes
11:15. Edge of small patch of swamp Lots of tangles See group of tamarins. Presumably "usual" type but light is too poor to see colors (although rain has stopped) Inds. ranging 20-40 ft up. At first utter moderately long, non plaintive W's. Possibly before they became aware of our presence. Then switch to LSN's In one case with SS Then run off, still continuing LSN's. Then stop. Then I can hear more W's in distance.
This group probably included 4 inds.
Continue a long time without seeing anything more. Finally stop observations 4:30 pm.
NOTES: The monkeys (tamarins) around here certainly seem to stop activity around the middle of the day! Very unlike Puiche's in Panama.
I am beginning to think that the local tamarin