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Mixed Monkeys, Sept. 23, 1964, II 2 2

  4:16 pm. Come across group of at least 3 apella. Moving along branches large trees, 20-40 ft above ground, around edge of big windfall. Individuals far apart from one another. Quiet. Only utter occasional single "coughing" sounds. Some Like "Ugh". Others like "Chee-uh-ugh". Not at all plaintive. Presumably some type of B (MG?) and/or Trll type pattern. Didn't see accompanying movements - if any. Certainly no other species associated with these animals. 

  4:32 Can hear howlers Roaring in great distance. Doesn't provoke any reaction from anything in my neck of the woods.

  4:50. Come across 2 adult female Red Howlers. One carrying small infant on belly. In isolated large tree, 20-30 ft above ground. Both take off very rapidly as soon as they see me. Probably uttered very soft barks or grunts as they went.

  Leave 5:15 pm.

  NOTE: Although I didn't see any Titis in this Monte Seco forest, I am assured that they do occur there. But probably they are not as thick here as in the Socay forest where we worked this morning. On the other hand, Howlers, Squirrel Monkeys, and apella definitely do not occur in the Socay Forest. The two forests are quite different in appearance. Socay much more uniform. Looks like 50-60 year old second growth nearly throughout. Monte Seco much more varied. Some young second growth. Lots of older second growth of all stages.  And an appreciable number of big trees, apparently mature, possibly selects of original forest  Also lots of windfall. Patches of Palm Forest.

  According to Jack ---, the local Squirrel Monkeys and