Question: what is the most intelligent type of monkey you work with?

Lewis Dean answered on 10 Mar 2014:

Different species are clever in different ways. Overall chimpanzees (which are actually an ape, not a monkey) are really smart. They are very good at solving puzzles. It’s amazing to watch them solve them (although they often just try to break things instead, so you any puzzle that we use with chimps has to be really strong).