Saiphos equalis
Silhouette: David Orr · PhyloPic
In 3 days ~20% in a week ~30%
Saiphos equalis, commonly known as the yellow-bellied three-toed skink or simply three-toed skink, is a species of burrowing skink found in eastern Australia. It is the only species classified under the genus Saiphos. The lizard has attracted scientific attention due to its dual reproduction habits of producing young via eggs in coastal populations, or via live young in colder mountain regions.
Saiphos equalis grows to a length of 18 cm (7.1 in) including the tail. It has a brown back and an orange belly. The skink is active at night, and feeds on insects. Along the coastal lowlands of Australia, the skink has been observed laying eggs and giving birth to live young for reproduction. Individuals of the species in the lowlands lay eggs (oviparous), while its neighbors to the north in the mountains are almost exclusively giving birth to live young (viviparous).
Saiphos equalis was originally described by the British zoologist John Edward Gray in 1825 as Seps equalis. In 1831, Gray reclassified it under a genus he separately established, Saiphos. Saiphos equalis is now considered to be the only member of the genus Saiphos. It belongs to... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Royal National Park | 🇦🇺 Australia | |
| 2 | Blue Mountains National Park | 🇦🇺 Australia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sydney | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report a Yellow-bellied Three-toed Skink sighting in Blue Mountains National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 42nd most-seen of the 44 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–May and September–December
In those months about 10% of wildlife watchers report a Yellow-bellied Three-toed Skink in Blue Mountains National Park on a given day, against under 5% in January–March and June–August, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Yellow-bellied Three-toed 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.
Among the best
Of the 2 parks where we can rate Yellow-bellied Three-toed Skink sightings, Blue Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Royal National Park (Australia, about 10%).
Same family: Scincidae
The closest relatives of the Yellow-bellied Three-toed Skink that you can see in Blue Mountains National Park (family Scincidae, Skinks) are Southern Water Skink (about 40%), Eastern Water Skink (about 40%) and Blotched Bluetongue (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-bellied Three-toed Skink is recorded against all the reptiles logged in Blue Mountains National Park (7 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.
