Reptile species profile
Thick-tailed Gecko
A detailed profile covering characteristics, everyday care and linked health conditions.
Quick facts
A concise guide to typical adult needs and characteristics.
Lifespan values identify ranges, study medians and open-ended estimates explicitly. Ratings appear only for comparable care or activity scales. Individual animals still vary with age, health, breeding, environment and previous care.
Profile description
The Thick-tailed Gecko is native to temperate woodland, rocky areas and coastal heath in southern and eastern Australia, sheltering beneath rocks and bark. Total length is usually 12 to 16 cm. Expected captive lifespan is often 10 to 15 years. The Thick-tailed Gecko is a nocturnal ground gecko that can vocalise and display its thick tail. It is generally hardy but can be stressed by excessive heat. Its natural feeding biology is insectivorous, taking crickets, roaches, moths and other appropriately sized invertebrates.
Geckos are generally small lizards with delicate skin and specialised feet or tails. Their small body size makes them vulnerable to rapid dehydration, nutritional error and medication overdose. Many are nocturnal and require secure dark retreats, an appropriate night-time temperature drop and supplementation planned around prey size, gut loading and species-specific ultraviolet exposure rather than indiscriminate dusting.
Assess Thick-tailed Gecko suitability against adult size, lifespan, enclosure cost, veterinary access and the ability to maintain accurate heat, ultraviolet, humidity and hygiene systems. Compared with arid knob-tailed geckos, it often benefits from cooler conditions and reliably humid retreats. Persistent high basking temperatures can cause dehydration and heat stress.
Thick-tailed Gecko (Underwoodisaurus milii) is a native reptile included on the Queensland Government's current keeper-licence species search; the listed Queensland requirement is Queensland Standard Licence. State and territory rules for the Thick-tailed Gecko, including licence class, possession, breeding, movement and records, differ and can change. Obtain the Thick-tailed Gecko only from a lawful captive-bred source; native reptiles must not be taken from the wild and exotic reptiles cannot be imported as pets.
First-time reptile owner tips
Practical preparation for welcoming this reptile into your care.
Care requirements
Provide a moderate gradient, secure hides, a humid retreat, textured ground cover and seasonal cooling appropriate to health and reproductive plans. Use varied gut-loaded insects and careful calcium supplementation. A secure enclosure must exclude gaps around doors, ventilation and cables. Provide multiple micro-hides, including a humid retreat, without saturating the whole enclosure. Prey should be cultured from reliable sources, gut-loaded and dusted according to veterinary or experienced species-specific guidance. Handling should be minimal, supported and never involve gripping the tail.
Offer the Thick-tailed Gecko appropriately sized, well-fed insect prey and measure calcium or vitamin supplements according to the diet and veterinary guidance. Remove uneaten insects that could injure a resting or shedding gecko. Nutrition should reflect the animal's natural feeding biology and life stage, not a universal reptile menu. Provide the Thick-tailed Gecko with fresh water and the species-appropriate humidity or humid retreat needed for hydration and complete shedding.
Begin with a veterinary check after acquisition and maintain regular annual care with a veterinarian experienced in reptiles. Record the Thick-tailed Gecko's weight, body condition, meals, faecal output, sheds, activity, basking and reproductive events. Quarantine a new Thick-tailed Gecko in a separate room with dedicated equipment for a veterinarian-directed period before sharing air, water, furnishings or tools. Good Thick-tailed Gecko hygiene supports the rest of the husbandry program. Remove the Thick-tailed Gecko's waste promptly, clean food and water containers, disinfect with a reptile-safe method and rinse thoroughly. Avoid transferring mites, cryptosporidia, adenovirus, serpentoviruses or bacteria between the Thick-tailed Gecko and other reptiles on hands, hooks, tubs or furnishings. Wash hands after handling the Thick-tailed Gecko or its enclosure, supervise children and vulnerable people, and keep the reptile and its equipment away from food preparation.
Urgent veterinary signs in the Thick-tailed Gecko include open-mouth or laboured breathing, collapse, seizures, severe weakness, prolapse, uncontrolled bleeding, major burns, inability to pass eggs and persistent vomiting or regurgitation.
Conditions linked to this breed or species
Obesity
View condition information, screening, treatment and affected breeds or species
General Malnutrition and Inappropriate Diet
View condition information, screening, treatment and affected breeds or species
Metabolic Bone Disease / Nutritional Secondary Hyperparathyroidism
View condition information, screening, treatment and affected breeds or species
Hypovitaminosis A
View condition information, screening, treatment and affected breeds or species
Vitamin or Mineral Supplement Toxicity
View condition information, screening, treatment and affected breeds or species
Dehydration
View condition information, screening, treatment and affected breeds or species
Thermal Burns
View condition information, screening, treatment and affected breeds or species
Hypothermia and Inadequate Basking
View condition information, screening, treatment and affected breeds or species
Heat Stress and Hyperthermia
View condition information, screening, treatment and affected breeds or species
Dysecdysis / Abnormal Shedding
View condition information, screening, treatment and affected breeds or species
Retained Spectacle / Eye Cap
View condition information, screening, treatment and affected breeds or species
Skin Trauma and Abrasions
View condition information, screening, treatment and affected breeds or species
Rostral Trauma
View condition information, screening, treatment and affected breeds or species
Tail Injury and Autotomy
View condition information, screening, treatment and affected breeds or species
Bite Wounds and Cohabitation Injury
View condition information, screening, treatment and affected breeds or species
Infectious Stomatitis / Mouth Rot
View condition information, screening, treatment and affected breeds or species
Bacterial Respiratory Disease and Pneumonia
View condition information, screening, treatment and affected breeds or species
Septicaemia
View condition information, screening, treatment and affected breeds or species
Abscesses
View condition information, screening, treatment and affected breeds or species
Bacterial Dermatitis / Scale Rot
View condition information, screening, treatment and affected breeds or species
Fungal Dermatitis and Systemic Mycosis
View condition information, screening, treatment and affected breeds or species
Snake and Lizard Mite Infestation
View condition information, screening, treatment and affected breeds or species
Ticks
View condition information, screening, treatment and affected breeds or species
Intestinal Nematodes and Other Helminths
View condition information, screening, treatment and affected breeds or species
Coccidiosis
View condition information, screening, treatment and affected breeds or species
Cryptosporidiosis
View condition information, screening, treatment and affected breeds or species
Amoebiasis
View condition information, screening, treatment and affected breeds or species
Flagellate and Other Protozoal Enteritis
View condition information, screening, treatment and affected breeds or species
Salmonella Carriage and Salmonellosis
View condition information, screening, treatment and affected breeds or species
Mycobacteriosis
View condition information, screening, treatment and affected breeds or species
Conjunctivitis and Keratitis
View condition information, screening, treatment and affected breeds or species
Cataract and Lens Disease
View condition information, screening, treatment and affected breeds or species
Cloacal Prolapse
View condition information, screening, treatment and affected breeds or species
Constipation and Obstipation
View condition information, screening, treatment and affected breeds or species
Gastrointestinal Impaction and Foreign Body
View condition information, screening, treatment and affected breeds or species
Regurgitation and Vomiting
View condition information, screening, treatment and affected breeds or species
Dystocia / Egg Retention
View condition information, screening, treatment and affected breeds or species
Preovulatory Follicular Stasis
View condition information, screening, treatment and affected breeds or species
Hemipene or Phallus Prolapse
View condition information, screening, treatment and affected breeds or species
Gout and Hyperuricaemia
View condition information, screening, treatment and affected breeds or species
Chronic Kidney Disease
View condition information, screening, treatment and affected breeds or species
Hepatic Lipidosis and Chronic Liver Disease
View condition information, screening, treatment and affected breeds or species
Neoplasia / Cancer
View condition information, screening, treatment and affected breeds or species
Fractures and Orthopaedic Trauma
View condition information, screening, treatment and affected breeds or species