The following idea was brought to you by mania! I thought this sub would appreciate it.

So I know what I wanna do, I am going to start feeding crows. They are very smart and very cool birds. So I am going to start feeding them, take it slow if I have to, build up trust. I will keep this up and repeat the process for other crow families around my city. Then I will teach them to come to me when I raise my arms, kinda like the Night King from GoT. Then, the next time someone gives me trouble in the park or wherever, I raise my arms and BOOM! Crow army! 

It might sound dumb but if someone summoned fifty screaming death pigeons on command I bet you would rethink your course of action.