Flying squirrels in China have discovered a clever new trick to store nuts for longer

A squirrel climbing down a tree in a tropical rainforest at night

Flying squirrels in China have developed a clever way to hide their nuts —  chewing grooves in them so they can be stored between tree branches. 

The unusual behavior, seen in two species in the tropical rainforests of Hainan Island, may preserve the critters' food for longer than burying the nuts in the moist forest floor, scientists said.