Once a crow found some cheese on a window sill and decided to steal it with his beak.
Then, he flew on the branch of a tree for eating it quietly.
A fox saw him and smelled the piece of cheese; so he thought of a plan and started in praise the crow for its sweet voice.
The crow felt proud and tried to sing a song, but as he opened his beak, the piece of cheese fell down and the fox took it away and ate it.
This fable teaches that you have to beware of flatterers.