S. mustelinus is usually nocturnal, but is most active in the evening and warm mornings.

[citation needed] The southern weasel skink is around 45 mm (1.8 in) from snout to vent, is covered in iridescent reddish brown (fine) scales, and has several distinctive white marks behind and below the eye.

[4] If frightened this skink has the ability to lose its tail as a defence mechanism; the tail lies on the ground twitching, distracting the predator so the skink can escape.

[5][6][7] The southern weasel skink tends to utilize existing vegetation and fallen timber for shelter.

Media related to Saproscincus mustelinus at Wikimedia Commons