Climb Speed
A creature with a Climb Speed may scale vertical surfaces, such as a tree or wall, with ease. Typically, the creature does not need to make a Climb check to do so unless conditions are particularly treacherous (GM's discretion), in which case the Difficulty of the check is reduced by 2. A creature with the Spider Climb ability can also travel across ceilings or overhangs (i.e. upside down) without hindrance.
A creature with a Climb Speed does not risk falling due to damage suffered while Climbing.