Varanus tristis tristis

Varanus tristis tristis, commonly known as the black-headed monitor, is a subspecies endemic to Western Australia, particularly around Perth and the surrounding areas. It is distinguished by its dark coloration, black head and banded tail. This semi-arboreal species inhabits jarrah forests and granite outcrops of the Darling Range. It shelters in tree hollows, under loose bark, and in rock crevices.In captivity, V. t. tristis requires a spacious enclosure with sturdy branches for climbing and elevated hides that reflect its natural behaviour. A very intense basking spot (around 50–60 °C) is essential for its well-being. Its diet is varied, consisting of insects, small reptiles, eggs and occasionally small mammals. In the wild, this monitor is highly active and fast-moving, sometimes travelling up to one kilometre per day in search of food. Although naturally wary, gradual acclimation allows the keeper to observe fascinating natural behaviours.