Magpie Chasing a Marsh Harrier

Just noticed these two out of the corner of my eye I've never seen a magpie move so fast chasing after the Marsh Harrier. I realized after wards that the magpie had had a big height advantage and so was able to catch up to the Harrier. Just after this shot the Harrier put on his air brakes and the Magpie over shot and the Harrier was immeadiately on his tail. (See next photo, getting out of range of lens now) I lost them against the trees in the background after this.