The most colourful member of the black snake genus Pseudechis, it has dark brown to black upperparts, with pink or cream banding and sides, and pale yellow to orange underparts. The irregular bands are usually cross-shaped and are generally an orange-red colour. The Collett's underbelly is normally the same colour as its bands, but may have varied discolourisations or discoloured patches. Juveniles are usually the same colour as adults but generally have brighter shades and contrast more. It is similar in physical structure (but not appearance) to the Red-Bellied Black Snake.
The Collett's Snake are usually found between 1.8 - 2.2 metres. Males can reach up to 2.6 metres in length, while females can reach up to 2.1 metres. They are usually 30 centimetres in length at birth.
