Mr Britton said fatal attacks had very gradually increased since crocodiles were protected in the 1970s, to an average of one every two years.

"You can get three or four attacks within a short space of time, it doesn't necessarily mean there's suddenly been a dramatic increase in the number of crocodile attacks," he said.

"It just means there's been a dramatic increase in the number of people taking unnecessary risks, or putting themselves in a position that they don't think is necessarily safe, and it's tragic when it happens."