Varanus storri
Storr's monitor is a species of monitor lizard in the family Varanidae. The species is endemic to Australia.
Etymology
The specific name, storri, is in honor of Australian herpetologist Glen Milton Storr.Geographic range and habitat
Varanus storri is found in the seasonal tropical regions of Australia, specifically in rocky environments. V. storri storri is found in eastern Australia, from Charters Tower to the Queensland, whereas V. storri ocreatus is predominantly located in Western Australia and the Northern Territory. Thus, both subspecies are found in the same climate and alike habitats. They can be found in open woodland, grasslands, spinifex, and rocky areas.Description
The species V. storri is smaller and duller colored than the similar looking spiny-tailed monitor. V. storri grows up to just over in total length. V. s. ocreatus has a longer tail and limbs than V. s. storri; the former's tail is 1.6 times longer than its snout to vent length while the latter has a tail that is only 1.4 times longer. V. s. ocreatus also has enlarged scales on the bottom of the end of its hindlegs.The species does not display sexual dimorphism, and even the cluster of spiny scales on either sides of the male's vent in many other Odatria species is present in both sexes of Storr's monitor.
Behavior
The species V. storri is terrestrial, and is even less arboreal than the related spiny-tailed monitor.The species lives in colonies in the wild, and as many as 50 animals may live together in a 0.75 km2 area, although each individual inhabits its own U-shaped burrow under a large rock or spinifex. Individuals sometimes wave their tails at each other. V. storri is most active between February and March, and between July and November, during mornings and late afternoons, retreating to its burrow during the hottest time of the day; unlike larger monitors, it remains active during cooler parts of the day with exception of the cold winter months.
Although previously reported to change color with increasing temperature, the subspecies of V. storri were found to neither change color nor absorb solar radiation between in later studies.