At the Train Station

What do you think these spikes are for? On the train platform, they are everywhere up above.

On the signs,



on the camera,



on the beams and outside walls of the building,



and even on the clock.



They were put there to prevent pigeons and other birds from building nests up above. Because of the spikes, the birds can't even sit above the platforms. All the train platforms on my line are open to the outside, but not all of them have these spikes. Surely, birds know to stay away from these places. At least, I hope so.