Monkeys (Callicebus cupreus or similar - see below)
We were supposed to depart from Coca dock for the 4 hour canoe trip (a bit over half of the time on a motorised canoe along the Napo, and a bit over an hour on a paddled canoe down a small river) to our final lodge at 11.00, but the weather was bad and the planes from Quito were unable to fly. As most of the other passengers were arriving by plane from Quito, the boat was unable to leave. In the end we eventually departed around 2.00 p.m.
While waiting in the area beside the dock there were a number of creatures that were clearly used to raiding human food etc. Thus in spite of the unwanted delay I was able to get a few photos.
These were some of the monkeys that were seen in the area. The squirrel monkeys were far more adventurous and would in fact steal from tables. The white band above the face looked as though it should be diagnostic to me.
A search so far has found the red titi monkey as the nearest possibility. It seems to have similarities but most photos of that also have differences.