Adults of this species are substantial, reaching up to three metres in length. They have a notably large head that is distinctly separate from their neck, and their bodies are covered in small, numerous scales. Their coloration is unique, with hues spanning from brown to various shades of grey, adorned with darker-edged light spots, bands, or lines. In particular, the diamond variant, predominantly found in the central and southern regions of New South Wales, has a darker appearance, nearly black, highlighted by numerous white or yellow spots that occasionally cluster together. Conversely, all juvenile specimens display a reddish-brown hue with subtle markings.
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