First bird to attack me in Australia and draw blood I think, Butcher bird from behind. 1993 I'd guess.
You were lucky it wasn't an emu!
Pied butcherbird had a couple of half-hearted swoops at me whilst I was mapping on Sunday morning. Didn't hit me as I had a broad-brimmed hat on. They seem to be very territorial irrespective of whether they have young and sit in low branches very close to where you are before having a bit of a swoop.