Jeez, why is it that you people always miss the obvious question.
Was the Great Horned Owl stocking your pond?
Was he/she carrying any fish or fish eggs?
How do you know that your pond is not teeming with bullheads now?
About time you chimed in....I was giggling last night thinking about how a city boy like you [or me] would react to one of these silently swooping down next to you in the middle of the night. That's why we always carry an extra pair of briefs in the truck...