I'm getting to know this Peregrine now, but she isn't quite sure of me. I've drifted by her in the canoe before but this time she seemed suspicious and left suddenly rather than comfortably preening. I'll recalibrate my distance next time and try not to disturb her. I know it's the same bird because she is missing the tip of her upper mandible (bill).
She keeps a lookout while dinner passes silently behind her. The shorebirds keep a close eye on her too.