Cleveland Metroparks Zoo have found a new use for old phone books, hiding treats in them and giving them to the primates to forage through. The swamp monkeys (pictured below) speedily flip through the big books page by page, while the Hamadryas baboons (next page) take a slower, more cautious approach.
Ultimately, both species ended up finding all the hidden food. The phone books and other household items serve as enrichment tools for the animals, encouraging them to engage with new objects and keeping their minds stimulated.
The swamp monkeys and baboons are on exhibit daily at the Zoo's Primate, Cat & Aquatics Building. More photos after the jump.