Territories in the wild are large not as a matter of taste but of necessity. In a zoo, we do for animals what we have done for ourselves with houses: we bring together in a small space what in the wild is spread out. Whereas before for us the cave was here, the river over there, the hunting grounds a mile that way, the lookout next to it, the berries somewhere else--all of them infested with lions, snakes, ants, leeches and poison ivy--now the river flows through taps at hand's reach and we can wash next to where we sleep, we can eat where we have cooked, and we can surround the whole with a protective wall and keep it clean and warm. A house is a compressed territory where our basic needs can be fulfilled close by and safely. A sound zoo enclosure is the equivalent for an animal (with the noteworthy absence of a fireplace or the like, present in every human habitation).