Flying squirrels carve nuts to store them securely in tree branches

Two species of flying squirrel living in the tropical rainforests of Hainan Island off China carve grooves around nuts so they can be wedged in the forks of twigs without falling out. Researchers found around 150 stored nuts in a 5-hectare area of forest, then set up 32 infrared cameras to monitor some of the stored nuts. They found two species of squirrels came to check the nuts or retrieve them.