Yoorn is known in English as the Bobtail. Its scientific name is Tiliqua rugosa. Three of the four subspecies of Tiliqua rugosa live in WA:
- T. r. rugosa: bobtail or Western shingleback – Western Australia
- T. r. asper: Eastern shingleback – Eastern Australia
- T. r. konowi: Rottnest Island bobtail or Rottnest Island shingleback – Wadjemup (Rottnest Island)
- T. r. palarra: Northern bobtail or Shark Bay shingleback – Shark Bay
Yoorn has a heavily armoured body and a bright blue tongue, and it can be found in various colours, ranging from dark brown to cream. It has a short, wide, stumpy tail that resembles its head and may confuse predators. The tail also contains fat reserves, which are drawn upon during brumation in winter. Yoorn is an omnivore; it eats snails and plants and spends much of its time browsing through vegetation for food. It is often seen sunning itself on roadsides or other paved areas.
- Vivienne Hansen and John Horsfall. "Get well soon, the Noongar way". Australian Geographic. 1 February 2017. Retrieved 25 February 2019