If you find a sick or injured wild animal, contact your nearest veterinarian or wildlife carer organisation as soon as possible so that it may receive appropriate treatment. Wild animals become stressed by handling, so you should seek expert advice before handling an injured animal. Try to minimise the amount of exposure the injured animal has to people and loud noises. Do not attempt to feed or treat it unless you have specialist knowledge or training.
If you have found wildlife in South Australia you need to contact RSPCA SA on 08 8231 6931.
They should be able to point you in the right direction.