You may be confusing aboriginals with others. To the best of my knowledge, Australian aboriginals are not and were not head-hunters. I'm happy to be corrected if I am wrong.
The Maori people had a more violent past, and there's a good deal of material available to read about that.
One of the truly amazing thing about Australian aboriginal people concerns knowledge of how to survive snake bites. This is anecdotal only; I wasn't given source material, so I can't provide evidence. But... when I undertook my first round of First Aid Training, our instructor mentioned an example of an aboriginal elder being bitten by an eastern brown snake. He was in a remote area, completely alone. He stayed in the same position, as close to motionless as it's possible to be, for the next 3 or so days. He entered into a sort of trance-state, which in practical terms meant his heart rate did not accelerate with fear or activity. This meant that the venom - which would have entered lymphatic fluid - never reached the blood system (through the lymph nodes). As a result, because the aboriginal remained calm and motionless, his body expelled the venom and after those 3 or so days, he knew it was safe to move.
It's certainly true that if you're bitten by a snake in Australia, you should not panic; you should stay calm; you should call 000 for help (assuming you have your mobile phone with you); you should try to apply a pressure bandage; you should definitely not run and if possible you should stay still. Don't wash the wound. Don't try to suck out the venom. Don't apply a tight tourniquet. Just ... still, calm, pressure bandage, 000.
