CE says…

As with our previous location, Monkey Island in the Colombian Amazon was affected by flooding, caused by heavy rainfall in the three weeks prior to our arrival. That didn’t dampen the spirits of these very active squirrel monkeys, though! John suggested switching to shutter-priority mode and dialling in a minimum shutter speed of 1/500 sec to get sharp shots of the monkeys. Although they were very approachable, working with a medium telephoto lens made it easier to isolate them, with a wide aperture of f/2.8 giving a narrow depth of field that softened out the background details.