TL;DR: I built a wifi-equipped water gun to shoot the pigeons on my balcony, controlled over the internet by a python script running openCV reading the camera image of my old iPhone. Introduction The pigeons in my backyard find particular pleasures in voiding their excrements onto my balcony. Dissatisfied with this situation, I went online to find a solution. I created a handy table to give you an overview of the vast number of effective established ways to get rid if pigeons: