Cheek pouch

Chipmunk showing the cheek pouch
Golden hamster filling his cheek pouches with greenery
Cheek pouch stuffed with fruits in bonnet macaque

Cheek pouches are pockets on both sides of the head of some mammals between the jaw and the cheek. They can be found on mammals including the platypus, some rodents, and most monkeys, as well as the marsupial koala.

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