The second crocodile in the Mary River.
The second crocodile in the Mary River. Department of Environment and Heritage Protection

Sex of 'Mary Croccins' pair remains a mystery

A SENIOR wildlife ranger says it is impossible to determine the sex of two crocodiles living in the Mary River near Beaver Rock without physically checking the creatures.

Greg O'Neill said although there was a general size difference between males and females, the size of a crocodile depended on various factors.

The only way to know the sex was to physically check as a male's penis was often hidden inside his cloaca.

On Thursday, Mr O'Neill was one of two rangers who were able to confirm there was a second crocodile in the river when they spotted it floating near the resident "Mary Croccins" near the Beaver Rock boat ramp.

The second croc is 2.6m long while the other is 3.5m.

"Males are generally larger - an average male may be 3-4m long," Mr O'Neill said.

"It's unusual to get a female over 3m."

Mr O'Neill said they would be setting traps to try to catch the crocodiles for relocation as per the Department of Environmental and Heritage Protection crocodile management policy.

The policy states that any crocs south of the Boyne River near Gladstone will be targeted for removal to a crocodile farm or zoo.

He said both crocodiles were displaying good behaviour.

"These crocs aren't demonstrating aggressive behaviour, which is what we want," Mr O'Neill said.

"But residents still need to be croc-wise."

Crocodile sightings should be reported on 1300 130 372.



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