Japanese macaque food cleaning behavior

Japanese macaques at Lincoln Park Zoo cleaning pieces of sweet potato prior to consuming them. This footage was collected as part of an evaluation of their food washing and food cleaning behavior to understand the role of social learning in the emergence of such behaviors.In this video we see Japanese macaque Miyagi using three different techniques to clean potato pieces. First he uses the "hand" technique, then the "body" technique, and lastly he switches to use the "food" technique. Here is a detailed description of the behaviors observed during the clip:0:01 to 0:05 sec: macaques released to outdoor habitat containing sanded potatoes, adult female Izumi, center of screen, eats without cleaning 0:08 adult male Miyagi cleans using other hand (coded as “hand” cleaning) 0:16 adult male Miyagi cleans using back of other wrist (coded as “body” cleaning) 0:21 adult male Miyagi cleans using back of other wrist (coded as “body” cleaning) 0:25 adult male Miyagi eats without cleaning 0:27 adult male Miyagi cleans using other hand (coded as “food” cleaning)