Well, perhaps it isn't so much squatters as it is nesters? One of the regulars here in the campground asked me the other day if I was aware of the activities of our local mockingbird. When I told him that all I had noticed was that there had been a lot of singing in our tree next to the campsite, he suggested that I open the engine access cover on our motorhome. That was clearly a good thing to do, as this is what I found.

He had quite a construction project going on the airfilter housing of our engine! Being a nasty landlord, I evicted him!