This one knew exactly where to strike. Never struck my helmet, went straight for my ear resulting in multiple minor puncture wounds. Swooped at least 6 - 7 times. Very aggressive.
Look out for swooping magpies on the Warburton trail around Woori Yallock. I received a nice strike to the back of the head just east of where the trail crosses the Healsville-Koo Wee Rup Rd.