Trees

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."