I couldn't see a relevant thread so forgive me if I'm repeating a resource.
Attacked this morning crossing the Torrens footbridge at John Keeley Reserve (just city side of Holbrooks Rd). Vicious bugga - no warning, one whack on the helmet, then ripped my ear open. There was a nasty brute operating in that area last year so it might be the same one.
Reported to the council who couldn't give a stuff. The even found it rather quaint when I suggested that they put up some warning signs.
You might want to direct Council to this SA Department of Environment page, which suggests placing warning signs. I wouldn't go as far as to say it's a directive which councils must obey, but at least it might carry some authority.
(Linked from this page under "swooping birds - how to live with them") https://www.environment.sa.gov.au/topics/plants-and-animals/Living_...
Richard, ages ago the AC menu Resources sent you straight to an AC / Adl magpie map.
Now it directs one to https://www.magpiealert.com/SwoopingMagpieMapSA.php
Magpie swooping a playful game of cat and mouse between boy and feathered friend
Published by ABC News on 12-Sep-2018
Each day when 9yo Tylah leaves the house it is game on with a local magpie, but in their case it is year-round and very much playtime.