blackbirds...

A: Ten blackbirds are sitting on a fence
and the farmer shoots one of them with his gun.
How many are left?

B: None, sir!

A: What do you mean?

B: Well, the other birds flew away!

Glossary:

fence: cerca

shoot: atirar, acertar

left: restaram

none: nenhum

fly (flew-flown) away = fugir, voar