Mice flee from combat, too small and fragile to do much. Only in unusually large swarms do mice ever get the bravery to attack things, and often things still too small to pose harm to mankind. Skills: Mice have a +4 racial bonus on Hide and Move Silently checks, and a +8 racial bonus on Balance, Climb, and Listen checks. A mouse can always choose to take 10 on Climb checks, even if rushed or threatened. A mouse uses its Dexterity modifier instead of its Strength modifier for Climb and Swim checks.