Fusebox fight

There are three little birds fighting over who gets to use the fuse box space as a nest. I keep telling them that no one gets to live there, but they don't listen and keep coming right back.
They are not afraid of me, they are not afraid of the shiny stuff I put up to keep them away. And they yell at me.
They've already used the fuse box from the floor above and made a mess there.
I've now tied the fuse box shut and taped over any gaps. They just won't take no for an answer and they've been diligently filling my fuse box with grass and feathers.
I've thought about singing like Snow White or Giselle (from Enchanted) to get them to do some work for me.