Peter
The female flew off as soon as he put his ladder up by the owl box, the male was still in the box. He put the bird in a cotton bag, it keeps them calm, he leaves the feet out as it makes it easier to handle. He measured the wing length, and weighed the bird ... 377grams this one, a breeding female would be around 450g.
No mate still at the same house, I was just being deliberately vague as to where it was located.