Rooms to let

I have had this bug house for a couple of years, and am delighted to see that as it weathers it has become more attractive to ??. well, who knows? The doors are really closed so I have no idea who is inside! There are also cobwebs, so it must interest spiders too.
I don't often think about the blip challenges, but this morning remembered Mono Monday. Why now, on a day when the garden is full of colour?!