This is very common and is frequently accompanied by aggressive attacks on Robop with birds swooping, diving and indeed “crapping” on it. A strong reaction such as this shows that the birds not only heard and saw Robop but immediately regarded it as a threat. This is excellent, although you probably wondered, “What the hell is happening here”.
Robop is in a sense a psychological warfare device. To understand how it works you need to understand a bit about bird psychology. Birds are highly territorial creatures, who particularly in the breeding season defend their territory vigorously. The idea that you are trying to plant in the birds mind is that a dangerous predator i.e. a Peregrine falcon, has set up a territory in the area you wish to protect.
Since the building is already in “occupied territory” the residents will try to intimidate the newcomer to fly off. Frequently, a single bird or pair of birds will swoop close to Robop but when Robop does not fly away they will round up reinforcements. In some cases we have seen anything up to several hundred birds called into the attack. When the attack fails i.e. Robop does not fly away, the birds will decide that they have to find a new territory. This leaves the area free of birds thereby achieving the objective.
← When I deployed Robop for the first time the bird population suddenly increased. Why was that?