Long-tailed macaques (Macaca fascicularis) are known for stealing food from tourists in several areas. Populations in Uluwatu temple, Indonesia are more advanced and steal valuables stuff such as phones, wallets, and glasses from tourists. They cannot consume those objects, but they wait for the temple staff to trade for them with fruits. This foraging techniques have to be learned through observation as well as trial and error. 

Sketch and Fact contributed by Nalina Aiempichitkijkarn