Further afield but just returned from some extreme bird ringing in Sweden. Watched some ringers getting to grips with Ural Owls.
Quite simple really, just put a ladder up a tree and go to the nest box to take out the chicks and ring them. This incidentally really does provide invaluable data on what is happening to these rare owls. Mummy Owl watches as a man goes to her home and starts on the kids !
Bird ringer sees the mummy owl and gets stick for self defense. This sensible man has a helmet on. His colleague who warns him if the Owl attacks doesn't.
The Ural Owl now looks a lot more aggressive.