Acritoscincus duperreyi
Silhouette: David Orr · PhyloPic
In 3 days ~20% in a week ~30%
The eastern three-lined skink (Acritoscincus duperreyi), also known commonly as the bold-striped cool-skink, is a species of skink, a lizard in the family Scincidae. The species is endemic to Australia. A. duperreyi has been extensively studied in the context of understanding the evolution of learning, viviparity in lizards, and temperature- and genetic-sex determination. A. duperreyi is classified as a species of "Least Concern" by the IUCN.
The species has also been placed in the genus Bassiana, with two other species of skink: B. trilineata and B. palynota. Micro-genetic analyses have revealed that the genus Bassiana began to diversify during the Miocene, suggesting that these three lineages started to form between 16.2 and 9.7 million years ago. Individual species in the genus began to diversify as well through the Miocene and into the Early Pleistocene. Within A. duperreyi, population-level diversification between the population on Tasmania, Kangaroo Island, and mainland Australia likely took place during the Upper Pliocene through the Early Pleistocene. Genetic evidence suggests that there are seven distinct lineages of A. duperreyi: five on mainland Australia,... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wilsons Promontory National Park | 🇦🇺 Australia | |
| 2 | Kosciuszko National Park | 🇦🇺 Australia | |
| 3 | Great Otway National Park | 🇦🇺 Australia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Melbourne | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report an Eastern Three-lined Skink sighting in Great Otway National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 18th most-seen of the 19 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April and September–November
In those months about 10% of wildlife watchers report an Eastern Three-lined Skink in Great Otway National Park on a given day, against under 5% in May–August and December–March, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Eastern Three-lined Skink sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Eastern Three-lined Skink sightings, Great Otway National Park ranks 3rd at about 10%. The best odds are in Wilsons Promontory National Park (Australia, about 20%) and Kosciuszko National Park (Australia, about 10%).
Same family: Scincidae
The closest relatives of the Eastern Three-lined Skink that you can see in Great Otway National Park (family Scincidae, Skinks) are Cool-temperate Water Skink (about 40%), Pale-flecked Garden Sunskink (about 30%) and Blotched Bluetongue (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eastern Three-lined Skink is recorded against all the reptiles logged in Great Otway National Park (6 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
