My blue mason bees especially... but also my leaf cutters.
I have bamboo "hotels" up for them all over the gaff... but sometimes they ignore the hotels and nest in old practice (dry-run) drill holes that I've occasionally made in the outbuilding walls, before I choose the correct-sized SDS bit and drill something, somewhere on
In the past, my dry-run drill holes in our external walls of the outbuildings have been used as lairs or, to use the proper, zoological term, "hidey-holes", for Segestria Florentina.
But this particular hole I happened across this afternoon, is being put to another use.
A few photos for you, then, below. All taken with the old Panasonic FZ50 and a snap-on Raynox DCR150 filter.