Howl Like A Wolf

A hungry wolf is not at rest.

(Portuguese)

Hunger drives the wolf out

of the woods.

(English)

The wolf doesn't concern himself with

the price of a sheep.

(African-Hausa)

It is a hard winter when one

wolf eats another.

(English)

If the wolf feared rain, he would

wear a clock.

(Greek)

The wolf is not afraid of the dog,

but he hates his bark. 

(Yiddish)

Do not measure the wolf's tail

till he be dead.

(Serbian)

A wolf changes his coat but

never his nature.

(Serbian)

All taken from Howl Like a Wolf: Animal Proverbs by Wolfgang Mieder.