So who's the Lizard King?
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The small Northern Territory town of Yulara has witnessed a showdown between two sand goannas and the moves have rattled locals.
Footage of the knock-down, drag-out fight on social media shows the lizards locked in a tense struggle, before scampering away.
Yulara local, Michael Brazier, said the town's wildlife kept him on his toes with regular entertaining visits.
"It looks like those lizards know jiu jitsu," Mr Brazier said.
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Local animals often find their way to his workplace at the Yulara Medical Centre, the remote nurse said.
Recent animal visitors also included some well-behaved dogs and an independent horse.
![Local dogs and horses congregate at the entrance to NT medical centre. Picture by Michael Brazier. Local dogs and horses congregate at the entrance to NT medical centre. Picture by Michael Brazier.](/images/transform/v1/crop/frm/194363481/e4be1513-79de-45f5-8272-2a33c4c76003.png/r67_0_1134_600_w1200_h678_fmax.jpg)
Sand goannas are skilled predators, using an exceptional sense of smell to hunt their prey, which includes any snake, insect or lizard smaller than a goanna.
Despite the ferocity of the goanna fight, attacks on humans are uncommon.
When confronted by a larger animal in the wild, goannas prefer to sprint short distances on their hind legs to find a safe place to hide.
Sand goannas mate during November and December, with females typically laying around six eggs.