Kunguru kote duniani ni weusi - Crows all over the world are black. A Chinese proverb having several interpretations that include:

1. Some rules, like those natural forces of the Universe, are unbendable, regardless of how much you may want it to change them.
2. Something or someone (bad) is no different from all the others (e.g., All government officials are corrupt, all lawyers are snakes, etc.).

Can be used together with Kunguru hafugiki - Crows cannot be tamed.