I was lucky enough to visit Shaldon Wildlife trust today, a small zoo in Devon with many small primates. When looking into the Yellow-breasted Capuchin enclosure I witnessed one of the group picking up a small log to break open what looked to be some sort of nut; this along with some similar behaviours was very interesting. How common would you say this is with captive primates? And has anyone got any interesting stories? All the best.