The birds inhabit a world that to them is complete, a repertoire of actions they must carry out every day, throughout their every year, in an interplay of events and instincts with no other significance than keeping them alive, sustaining them in their state of existence. They see the world, and they are familiar with it, though only as effect, not as cause. The sun is warm, the rain is wet, the air consists of various strata through which they fly. They are locked inside their birdness, through which
