A toddler was savaged by two dingoes and suffered a fractured skull.
The 14-month-old boy was in his family's camper trailer on Queensland's Fraser Island when the animals sneaked in.
The trailer was parked outside the designated camping areas, according to reports in Australia.
The screams of the boy being dragged away by his head woke up his dad , who chased the wild dogs for about 15 metres and wrestled his son to safety.
The boy was initially flown to Hervey Bay but was then transferred to the Queensland Children's Hospital in Brisbane for surgery.
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The boy's mum was also bitten.
"He has suffered multiple puncture wounds to his neck and skull," his parents said in a statement.
"Our son is doing well and in a stable condition.
"We would like to thank everyone who has helped and cared for our son, including the emergency services and the hospital teams."
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The Environment Department said on Saturday morning they were yet to find the dingoes responsible but 40 rangers had been dispatched to search and patrol the campsites.
In January a six-year-old boy was bitten multiple times and in February a nine-year-old boy and his mum were attacked.
Wildlife researcher Ben Allen said dingoes were treated well on Fraser Island, compared to other places across Australia, and that could be fuelling their emboldened behaviour.
He told ABC : "Across most of the country dingoes are not liked, they're shot at and baited and things like that," he said.
"They don't hang around people.
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"Everywhere where you have people providing a happy environment for dingoes, they get quite comfortable.
"They get very very habituated and when that happens you can run into problems."
He said the 15-kilogram dogs are "very capable predators, probably the most serious ones we've got in Australia".
He said it was not unusual for dingoes to get into tents or camper trailers, but they usually take a loaf of bread.
"But to be that bold or confident to take the boy is certainly concerning," he said.
He said Friday's attack is reminiscent of the attack on Azaria Chamberlain in the 1980s.
"Every time we have a serious incident like this on Fraser Island, or anywhere else, one of the things that goes through people's heads is 'we're just centimetres away or seconds away from another such case'."
