Dirk, if you ever get to visit down here you may wonder why the bike riders have all these plastic cable-ties sticking out of their bike helmets.
It's to stop Magpies swooping them in breeding season.
One Canberra postman discovered that if you feed the Magpies they become familiar with you and don't swoop. He stops during his rounds every day and feeds up to 30 Magpies.