A singing-bird was confined in a cage which hung outside a window, and had a way of singing at night when all other birds were asleep. One night a bat came and clung to the bars of the cage, and asked the bird why she was silent by day and sang only at night.
“I have a very good reason for doing so,” said the bird: “it was once when I was singing in the daytime that a fowler was attracted by my voice, and set his nets for me and caught me. Since then I have never sung except by night.”
Precautions are useless after the event.