The males visited the room and fluttered about the cage for a couple of hours, and some even passed the night there.

On the following day, at sunset, when I moved the cage, all were out of doors.

Although their lives are so ephemeral, the youngest were ready to resume their nocturnal expeditions a second and even a third time.

Where did they first go, these veterans of a day?
They knew precisely where the cage had been the night before.

One would have expected them to return to it, guided by memory; and that not finding it they would go out to continue their search elsewhere.