Anti-Bird Patrol

So, last night our landlady stopped by unexpectedly to tell us that some men would be coming today at 7:30 am to do some work on the building that they could only get to through our flat.

This morning we found out more of what's going on. There is a ledge outside our kitchen window where the pigeons like to perch, and poop. Two men are here to install these needle-like things that keep the birds from perching and, more importantly, pooping. In the picture, the ledge is straight ahead and our kitchen window is on the right.

After examining the situation from our window and installing a rod in the wall near the ledge, the men are now up on the roof of the building preparing to repel down (in a little seat, I think) to install the needles (the box says "Bird control systems"). The problem I see is that the roof overhangs about 8-10 feet from the ledge that they need to get to. We'll see how it goes. The landlady left for work; she has a meeting scheduled. So, I'm here with the men. Presumably, I should only need to give them access to our kitchen window.