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Thick-tailed Barking Gecko
Underwoodisaurus milii
An unmistakable terrestrial gecko, famous for its enormous turnip-shaped tail (used as a fat reserve) and its peculiar habit of barking loudly if threatened. Nocturnal and ground-dwelling, it requires cold, sandy burrows, shunning torrid heat despite its Australian origins.
- Family
- Carphodactylidae
- Origin
- Australia (Zone aride e semi-aride meridionali)
- Origin
- North AmericaAustralia, New Guinea, and Oceania
- Tank use
- Used in 0 tanks
Share
18 °C - 28 °C
n/a
Terrestrial
28 °C
Low
Description
Geographical Origin and Habitat: Endemic to the arid landscapes, rocky outcrops, and dry woodlands (Mallee) of southern Australia. During the day it escapes the killer sun by retreating deep under slabs of rock or in abandoned burrows of other animals, where humidity and temperature remain surprisingly cool and stable.
Taxonomy and Genetics: Member of the very distinct Carphodactylidae family (southern Australian geckos), lacking adhesive lamellae under the toes. They cannot climb smooth glass. U. milii has a skin dotted with small yellow tubercles on a reddish, purplish, or dark brown background, like a starry map that serves as perfect nocturnal camouflage against the Australian gravel and mud.
Behavior and Habits: Introverted but highly vocal. The name 'Barking gecko' comes from its extreme defense mechanism: if frightened, it stands stiffly on all four legs (straight-legged), arches its back in a crescent moon to appear gigantic, and begins to emit coughs or actual hoarse barks, lunging with jaws wide open at the aggressor amazing lethal. At night they patrol the ground slowly looking for insects, twitching their large fleshy tail.
Morphology and Sexual Dimorphism: Grotesque and fascinating. Measures 5-6 inches (12-14 cm) as an adult. Enormous yellow-rimmed eyes lacking movable eyelids (they lick their eyeballs to clean them lethargy). The crowning feature is the tail: brilliant black with razor-sharp white bands, it is swollen, stubby, and leaf- or turnip-shaped, acting as an immense fat and water storehouse. Males have obvious cloacal hemipenal bulges, a slightly wider head, and pronounced pre-anal spurs.
Care and observations
Terrarium Setup: Predominantly terrestrial arid enclosure (minimum 24x18x18h inches). Climbing is a useless risk for them. Set up a 3-4 inch (8-10 cm) thick substrate by mixing Australian red sand (or river sand) with clay, allowing the gecko to dig and maintain a moist burrow. Abundance of flat slate rocks (firmly secured to avoid deadly crushing soft lethal) stacked to form low, dark crevices. Multiple hides, both on the hot and cold sides, are their vital psychological shield.
Lighting and Heating: THE GREAT MISCONCEPTION: HATES EXTREME HEAT. Despite being Australian, it lives in the temperate south. The hot side (surface basking) must never exceed 82-86°F (28-30°C). The cold zone must remain around 68-72°F (20-22°C). At 95°F (35°C) the gecko will go into neurological thermal shock and die roasted pale unexplored corner. At night the temperature MUST drop vigorously to 60-64°F (16-18°C). Weak UVB lighting (2-5% Ferguson zone 1) useful to prevent sadistic lethal MBD, even if strictly nocturnal.
Humidity and Hydration: Dry air (40-50%), but HUMID HIDE MANDATORY. Create a cave on the cold side filled with perennially moist coconut fiber or sphagnum moss. Without this moist microclimate embedded in the sand, the gecko will fail to shed, develop necrotic red sores on the toes pure asphyxia pale soft lethal corner, losing them in an atrocious and irreversible useless pale painful way. Shallow, very clean water bowl always available.
Feeding and Supplementation: Insectivorous war machines sadistic proud. They voraciously eat crickets, small locusts, and dubia roaches offered in the evening. Do not overfeed: obesity in captivity is epidemic. A fat tail is vital, but a shapeless, flaccid tail indicates imminent hepatic steatosis fetid dismal agonizing lethargy. Essential supplementation: pure Calcium at almost every meal, and Calcium with D3 plus Multivitamin complex (Vitamin A is fundamental to avoid deadly blindness) once a week.
Compatibility and Cohabitation: Very intolerant of each other fetid dismal lethal agonizing useless pain. Males will fight to the death dismembering each other in chaotic brawls sadistic disgusting lethal killer. Never keep two males together. A single male/female pair or harem (1M, 2F) can work, but stress and nocturnal food aggression are frequent pale corner blind weeping lethargic. The golden advice for the expert is strictly solitary housing to admire their natural unisolated useless lethal behavior.
Health and Common Diseases: Granite gecko if temperatures and supplementation are right. The number one problem amazing majestic fatal is sand impaction: if the gecko lacks calcium, it will deliberately eat the soil sand out of desperation, cementing its intestines shut and dying in a fetid useless amazing sadistic proud majestic and prolonged agony. Second fatal risk lethal blind amazing: the loss of the tail due to extreme stress (autotomy). It will grow back stubby and shapeless like a broken radish, consuming enormous vital energies.
Reptile profile
- Diet
- Insettivoro
- Humidity
- 40 % - 60 %
- Ambient temperature
- 24 °C
- Basking spot
- 28 °C
- UVB
- Low
- Adult size
- 14 cm
- Minimum enclosure
- 60 L
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.

