http://www.dailymail.co.uk/new...flight-kestrels.html
Some very nice photos of kestrels attacking an owl !

I don't think those Kestrels would have been so keen if the owl had happened to be my European Eagle Owl! He is flying weight is 4lb 6oz with a nigh 6 foot wingspan, so other birds tend to make themselves scarce when I fly him.

Tyto, welcome to the forum ! Would you post photo's of your friend please.