[9] There has been a great amount of instability of the nomenclature of many Australian snake taxa, particularly concerning the generic classification of the smaller Elapidae, some of which have been placed in several different genera in the span of just a few decades.

[2] Adult S. dwyeri males average 31 cm (12 inches) in length from the tip of the snout to the uro-genital vent.

Like other snakes in the family Elapidae, S. dwyeri is venomous and has hollow fangs fixed at the front of the upper jaw.

[8] A 25-year-old man in Western Sydney mildly describes a snakebite from this species by saying that he was:... bitten on the finger by a Suta dwyeri once.

[13] When threatened P. dwyeri prefers to coil into a tight ball as a defense mechanism for protection from larger predators.

[4] S. dwyeri is a secretive, nocturnal snake that seeks shelter under rocks, debris, and ground litter, and may make its home in burrows made and abandoned by other creatures.