I've got four bird boxes (two with cameras) and as yet, we've had no takers this year. One of the boxes has had a couple of blue tits visit most days since February, and putting in a bit of nesting material in April, but have since stopped. An occasional bird visits the box without doing anything further.
This happened a couple of years ago when, like this year, we've had a miserably damp spring.
Anyone had any better luck?
Beauty is in the eye of the beholder.