Barking Gecko

Barking Gecko

Underwoodisaurus milii

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability Insufficient data
at Flinders Chase
2 Verified sightings at Flinders Chase From 2019 to 2026
42 Verified sightings across all 4 parks From 2019 to 2026
☀️🌙 Day & Night When it's spotted Active throughout day and night

About the Barking Gecko

Underwoodisaurus milii is a species of gecko, a lizard in the family Carphodactylidae. The species is commonly known as the thick-tailed or barking gecko, referring to its distinctive plump tail and sharp, barking defensive call. The genus is also often called thick-tailed geckos as a group, along with the species Uvidicolus sphyrurus.

The specific name, milii, is in honor of French sailor and naturalist Pierre Bernard Milius. Underwoodisaurus milii is reddish-brown with bands of white and yellow spots, and a paler underbelly. It usually grows to a total length (tail included) of 120–140 mm (4.7–5.5 in). The original tail is black with several pale bands; however, the regenerated tail has little pattern.

Underwoodisaurus milii is found in southern regions of Australia. Its distribution in Western Australia is throughout the southwest, the goldfields, wheatbelt, and Nullarbor regions to the east, and to Shark Bay in the north. It is also found at the Houtman Abrolhos and the Archipelago of the Recherche. U. milii is found in rocky outcrops and is slightly more cold-tolerant than many other Australian gecko species... Wikipedia →

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Daily sighting probability
1 Flinders Ranges National Park 🇦🇺 Australia
~40%
2 Royal National Park 🇦🇺 Australia
~10%
3 Flinders Chase 🇦🇺 Australia
Insufficient data
4 Blue Mountains National Park 🇦🇺 Australia
Insufficient data
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