Could you please send a picture, hard to understand where they are because we cannot see what you see.
Hi Dyane: If you have a somewhat flat surface, drag yourself to the dollar store and pick up some plastic or rubber snakes. Put them where the pigeons sit and they should stay away. They are afraid of snakes. :) good luck
Let us know if this worked for you.
Yep plastic snakes from the Dollar Tree did the trick on my clients roof top deck