Eulamprus tympanum

The Southern Water Skink can be found in and around watercourses such as small creeks where they will be seeking out small items of prey such as insects, tadpoles and frogs as well as other small lizards. With extensive rains they move further away from the water sources as food becomes more prevalent. https://habitatecology.com.au/whats-lurking-in-your-backyard-13-southern-water-skink/

They are a medium sized skink about 85mm from snout to vent, overall length maximum 150mm, olive brown in colour and with pale speckling on their darker flanks. The Southern Water Skink is endemic to Australia.

Skinks are part of the lizard family.

The females give birth to live young (viviparous) and amazingly can determine the sex of their offspring by regulating their temperature depending on time spent basking in the sun. It is not understood what it is that drives them to do this. https://en.wikipedia.org/wiki/Southern_water_skink