I was going to suggest wearing sunglasses on top of your head too. Here in Adelaide we have magpies that swoop in the main street. I used to walk through their territory on the way to work. I only ever got swooped when I was wearing black - nearly lost an eye the last time. It's a shame 'cause it's so nice walking through the parklands this time of year, but I was always too alert for magpies to really enjoy it.