Two tall trees, a birch and a beech, are growing in
the woods. A small tree begins to grow between
them, and the beech says to the birch, "Is that a
son of a beech or a son of a birch?"

The birch says he cannot tell. Just then a
woodpecker lands on the sapling. The birch says,
"Woodpecker, you are a tree expert. Can you tell if
that is a son of a beech or a son of a birch?"

The woodpecker takes a taste of the small tree. He
replies, "It is neither a son of a beech nor a son
of a birch. It is, however, the best piece of ash I
have ever put my pecker in."