Hundreds of pigeons are sitting on a parking garage close to the main train station in Wiesbaden in the German state of Hessen close to Frankfurt. A member of the pigeon shelter "Stadttaubenprojekt" is soon going to feed them in a nearby pigeon house where the pigeons nest and breed. Members of the pigeon shelter then exhange their eggs with dummies to reduce the pigeon population. No other method has proven to be more effective. It was originally tested in Augsburg and then adapted by the cities of Aachen, Stuttgart and Wiesbaden and financed by the authorities. Most German cities though assign pest control workers whose methods like spikes, nets and cages are deadly for pigeons and other birds in many cases. Pigeon houses are also much cheaper and humane than extermination methods.