This is nuts: Squirrels have personality traits similar to humans, new research shows - USA TODAY

A team of researchers at the University of California, Davis announced squirrels have personality traits similar to humans, and those traits are key to their survival and life expectancy.

The study, which the group says is the first to ever document personality in golden-mantled ground squirrels commonly found in western U.S.

and Canada, showed the animals had four different traits: boldness, aggressiveness, sociability and activity level.

Golden-mantled ground squirrels are commonly asocial, meaning they often try to avoid social interaction.