In Tapiche both the squirrels and squirrel monkeys were sometimes rather confusing:
Attached is a slightly out of focus picture of a Sciurus squirrel.
To me the hairs on the feet appear almost all red, but the hindlegs clearly show some black – does the black at the nail tips make this a Southern Amazon Red Squirrel? I think so, but not sure.
The two photos are identical, but the second has been overexposed three stops.
2. Squirrel Monkeys
The Handbook of the Mammals of the World 3 states that Ecuadorian Squirrel Monkey (macrodon) and the peruviensis form of Black-capped Squirrel Monkey both occur and intergrade in Tapiche (they specifically mention Rio Tapiche and Rio Blanco).
Some of the Squirrel Monkeys seemed to be pure peruviensis with a proper dark blackish cap, but the monkeys in these photos appear to be intergrades or even Ecuadorian Squirrel Monkeys. Can anyone comment?
Photo 1 (the “relaxing” animal) is from a different group than the other ones, which were all in the same group. One photo of three group of 3 was overexposed 2 stops in Photoshop for clarity.