Estuarine or saltwater crocodiles are the world's largest reptiles and can grow up to 5.5m in length.

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You're also guaranteed to spot crocodiles in the Top End, in places such as Cahill's Crossing or Yellow Waters in Kakadu.

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Zane Langman, the son-in-law of the farm's owner, told the newspaper that many of the crocodiles had escaped into dense bush and the Limpopo River, the second biggest in South Africa.

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"All of the bloggers who were online on other predators (such as crocodiles, jackals and birds) are now sharing each other's technology and learning from each other and exchanging, " she says.

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South Africa's Beeld newspaper quoted Mr Langman as saying that some of the crocodiles had been recaptured on a school rugby pitch in Muskina, a town on the border with Zimbabwe about 120km from the farm.

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The BBC's Duncan Kennedy in Sydney says it is extremely rare for people to be attacked by saltwater crocodiles - a protected species in Australia.

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