Getting MIL's house ready for sale and pressure-washed the front porch and steps today. This included two decorative columns that were full of bird poop, top to bottom. The nest looked empty at the time But I didn't have a ladder so I didn't blast it.
An hour later the column was dripping with poop again and when I asked who did it, I got a chorus of unapologetic "not me" from the poop squad.
I say if they are old enough to fly away while I'm working, they are old enough to relocate tomorrow.