@alex I'm assuming you're talking about Jungle Crows, although I think some parts of Japan has Carrion Crows too. Crows are exceptionally intelligent. They apparently are able to identify people and recognize when a person is generally nice to them vs when a person is generally mean to them, and they are able to communicate people's behaviors to other crows. They have been known to give their human friends gifts in the form of shiny objects (without promoting - corvids seem to find intrinsic value in shiny object), and may even group up to defend their human friends, or pester a non-friendly human.

So don't be mean to the crows lol

Inb4 a crow typed this