So, following that train of thought, could we not say that a BP in a tub with his hide that knows the simple pattern that on Saturday night a rat will walk by his hide?
So why should that snake leave? When the rats quit coming... or he wants to breed.
It very possible to say that BP's in the wild only move when they need to find a new colony of rats/gerbils, and in the meantime do not move very far at all from their hide.