Mayor George Seymour made the alarming claim following an attack at Orchid Beach in Queensland last Saturday.
A boy, 4, was bitten on the leg before his frantic parents chase the menacing dingo into nearby bushland.
In recent months, a toddler was mauled in April and another child was bitten in February after wandering outside early one morning when the rest of his family were asleep.
Fears are rising that the dingo population (pictured) on Fraser Island are rapidly 'losing their fear of humans'
Fraser Island (pictured) has long been a popular tourist haven - but the aggressive local wildlife can pose problems at times