When a predator cannot move faster than its preferred prey, ambushing its prey is likely to be more efficient than pursuit. A predator that can move at high speed for a long time can be a pursuit predator, chasing until its prey tires and slows. There are however many intermediate strategies; for example when a pursuit predator is faster than its prey over a short distance, but not in a long chase, then either stalking or ambushing becomes part of the strategy.