How to Care for pet Thick Tailed Geckos

Thinking about bringing home a pet Thick-tailed Gecko? This hardy, nocturnal Australian native (Underwoodisaurus milii), also known as the Barking Gecko for its distinctive defensive bark, stays small at just 10 to 14cm and can live 8 to 12 years with the right setup. Correct heating, secure hiding spots, a varied insect diet and a clean enclosure are what keep this species thriving in captivity. As a regulated native reptile in NSW, a valid keeper licence and proper record keeping are required before you bring one home, and this guide covers everything from housing through to sexing, so you know exactly what you’re taking on.

Quick Facts

Scientific name: Underwoodisaurus milii
Also known as: Barking Gecko, Thick-tailed Gecko
Adult size: 10 to 14cm, nose to tail tip
Lifespan: 8 to 12 years
Diet: Insectivore, live insects only
Enclosure minimum (adult): 30 x 30cm footprint, larger always welcome
Temperature: 27 to 29°C warm end, 21 to 23°C cool end
Licence required: Yes, a NSW Native Animal Keeper Licence
Experience level: Beginner-friendly with some homework, or a great next step up from a first reptile

Basic Thick-Tailed Gecko Information, Essential Supplies for Pet Thick-Tailed Geckos, Housing, Environment, Toys and Enrichment, Diet and Feeding, Providing Water to Your Thick-Tailed Gecko, Mineral Supplements and Vitamins, Behaviour and Handling, Common Health Issues, Parasite Control, Health, Hygiene and Safety, Toxic and Dangerous Hazards, Visual and Health Checks, Sexing, Record Keeping, Holiday Care, Transportation, Compatibility with Other Animals, Licensing, Frequently Asked Questions, Recommended Vets and Links

Basic Thick-Tailed Gecko Information

A small, ground-dwelling gecko native to the cooler, drier parts of southern Australia, the Thick-tailed Gecko is at home among rocky outcrops, grasslands and open woodland. It spends daylight hours tucked under bark, rocks or logs, only emerging after dark to hunt. Adults typically measure 10 to 14cm nose to tail tip, with females running slightly larger than males. It suits keepers with some reptile experience, but it’s still a manageable choice for a beginner willing to learn proper husbandry first, and with correct care it can live 8 to 12 years.

Essential Supplies for Pet Thick-Tailed Geckos

Carry enclosure: a sturdy, escape-proof and well-ventilated carry enclosure is mandatory for all reptiles leaving Birdsville
Secure enclosure: a low, wide enclosure of at least 30 x 30cm suits this ground-dwelling gecko well, larger is always welcome. Floor space matters more than height, and the lid needs to be genuinely secure, this species is stronger and more agile than its size suggests
Substrate: a mix of non-silica sand and sifted peat moss, or a commercial reptile-safe substrate, kept mostly dry
Live insects: roaches, crickets, mealworms and superworms, gut-loaded before feeding to boost their nutritional value
Warm and cool hides: a snug warm hide over the heated zone, and a roomier cool hide at the opposite end, both easy to clean, resin, ceramic or smooth rock all work well
Flat rocks, cork bark or low caves: secure, stable ground décor that can’t shift or crush the gecko if climbed on
Heating equipment: a thermostat-controlled under-tank heat mat on one side of the enclosure, or a ceramic heat emitter, so the gecko can move away from the heat when it wants to
Digital thermometer: a probe thermometer for accurate readings at both ends of the enclosure
Shallow water dish: sized so it can’t become a drowning hazard, especially for young geckos
Calcium, vitamin D3 and multivitamin supplements, plus feeding tongs for safe, controlled feeding
Reptile-safe disinfectant, sponges, brushes and paper towels, kept separate from household cleaning supplies

Everything on this list, and more, is available in-store, and our team can help you put together the right setup.

What You May Consider

A hygrometer, for keepers who’d rather track humidity precisely than rely on a misting schedule
A digital scale, useful for tracking weight over time
A second warm hide, handy in busier households where the gecko benefits from an extra retreat option

Housing

A single adult does well in an enclosure from 30 x 30cm upward, floor space is what counts for this ground-dwelling species, not height. Because Thick-tailed Geckos stay small their whole lives, a juvenile can usually start close to the adult minimum rather than needing a series of upgrades, though the same secure, well-ventilated lid applies regardless of size. Small groups can work, typically one male with one or more females, but adult males will fight if housed together, so never pair two males. Set up a warm hide directly over the heated zone and a cooler hide at the opposite end, with flat rocks, cork bark or low caves added for extra cover.

Environment

Thick-tailed Geckos come from a cooler, semi-arid part of Australia and do best with a moderate thermal gradient rather than intense desert heat. Aim for 27 to 29°C at the warm end using floor-level heating, and around 21 to 23°C at the cool end, close to normal room temperature. Night-time temperatures can drop a little further but should stay within a safe range, and every heat source needs to run through a thermostat to prevent overheating. Humidity should stay low to moderate: mist the cool end of the substrate two to three times a week rather than keeping the whole enclosure dry, and make sure ventilation is good enough to stop moisture building up. Provide a natural light cycle of around 10 to 12 hours a day. As a nocturnal species with a low tolerance for bright light, dedicated UVB isn’t considered essential for this gecko, though a low-level UVB tube can still support vitamin D3 production as part of a balanced setup.

Toys and Enrichment

Thick-tailed Geckos don’t need elaborate enrichment, but a few small changes go a long way toward keeping one active and engaged. Rotate the position of hides and décor every so often so there’s always something new to explore, and offer insects loose in the enclosure rather than only via tongs, letting natural hunting behaviour play out the way it would in the wild. A varied mix of feeder species also keeps mealtimes more interesting than the same prey item every time.

Diet and Feeding

Thick-tailed Geckos are enthusiastic insect eaters and should be offered a varied diet of appropriately sized live prey, crickets, roaches, mealworms and other commercially available feeder insects all work well. Keep prey no wider than your gecko’s head, if it looks like a stretch for your gecko to swallow, size it down. Feed in the evening once the lights go off, this species hunts at night and shows little interest in food during the day.

Here’s a straightforward schedule to follow by age:

Young geckos, up to around 12 to 18 months old and still growing: 3 to 4 small crickets or roaches every second day
Fully grown adults, 10 to 14cm and finished growing: 5 to 6 larger crickets or roaches every 3 days

Gut-load insects for 24 to 48 hours before offering them, dust with calcium every two to three feeds and add a reptile multivitamin once a week. Check the enclosure the next morning and remove anything left uneaten, insects left loose too long can stress or even nip at a resting gecko.

Providing Water to Your Thick-Tailed Gecko

Even a hardy, drought-adapted species like this one needs constant access to fresh water. Keep a shallow dish in the enclosure at all times, shallow enough that a young gecko can’t accidentally drown in it, and refill it daily rather than just topping it up. Scrub the dish with hot water weekly to stop biofilm forming, and use a vinegar rinse or a pet-safe disinfectant to shift any calcium residue before rinsing thoroughly.

Mineral Supplements and Vitamins

Calcium, vitamin D3 and a reptile multivitamin all play a role, and none of them substitutes for the others. Dust feeder insects with calcium every two to three feeds and add the multivitamin roughly once a week rather than every feed, over-supplementing can cause its own problems. If your lighting setup includes even low-level UVB, factor that in too, since it changes how much vitamin D3 your gecko needs from its diet. Ask our in-store team if you’re unsure how to balance it for your setup.

Behaviour and Handling

Thick-tailed Geckos tolerate gentle handling better than a lot of other gecko species, though sessions are still best kept short to avoid unnecessary stress. Never grab or restrain one by the tail, it will drop it readily as a defence mechanism. The tail does regenerate, but doing so costs the gecko significant energy and can affect its condition for a while afterward. That distinctive bark is a defensive warning, not aggression, and it’s one of the more memorable traits of keeping this species. Give your gecko several secure hiding spots so it can retreat and forage the way it naturally would.

Common Health Issues

Thick-tailed Geckos are resilient when their environment and diet are right. Most problems seen in captivity trace back to husbandry, the wrong temperature, poor nutrition, not enough hydration, or an enclosure that isn’t set up properly, so regular checks go a long way toward catching issues early.

Dehydration

A gecko without steady access to water or adequate humidity can dehydrate quickly. Watch for sunken eyes, wrinkled skin, lethargy or a general loss of condition, and keep fresh water available at all times, changed regularly.

Heat Stress and Burns

Overheated enclosures or poorly regulated heating equipment can cause thermal burns or heat stress. A gecko trying to escape the warm end, or acting unusually restless or lethargic there, needs its heating checked straight away. A proper thermal gradient lets it regulate on its own.

Respiratory Infections

Too much humidity, poor airflow or the wrong temperature range can bring on a respiratory infection. Wheezing, open-mouth breathing, nasal discharge and reduced activity are the signs to watch for, and a vet should see any gecko showing them.

Fungal and Skin Infections

Enclosures that stay damp for too long raise the risk of fungal or bacterial skin infections, showing up as discoloured patches, lesions or an odd-looking shed. Good ventilation paired with light, controlled misting rather than a consistently wet setup keeps this risk low.

Metabolic Bone Disease

Usually caused by not enough calcium, the wrong calcium-to-phosphorus balance, or general nutritional gaps. Weakness, tremors, a soft jaw and difficulty moving are the warning signs. Consistent supplementation and a balanced diet are the best prevention.

Shedding Problems

Low humidity or a gecko that isn’t in top condition can both lead to incomplete sheds, with retained skin most often left around the toes, tail or eyes. Left alone, that can cause circulation problems or infection, so good hydration and nutrition matter here too.

Parasites

Internal or external parasites can turn up in any collection, particularly in newly acquired geckos or enclosures that aren’t kept clean. Weight loss, a picky appetite, loose stools or a general drop in condition are the signs to look for, and any suspected case should go to a reptile-experienced vet for diagnosis and treatment.

Obesity

Overfeeding, heavy-handed supplementation or simply not enough room to move can all lead to a gecko carrying excess weight. A rounded body, fat deposits near the tail base and reduced activity are the signs. Stick to an appropriate feeding schedule and correctly sized prey to keep this in check.

Parasite Control

New geckos need four to six weeks in quarantine, kept separate from any other reptiles already in your home, with close attention paid the entire time even if the animal looks perfectly healthy from day one.

Health, Hygiene and Safety

Spot-clean daily to remove waste and any leftover insects, and give the water dish a full scrub and refill on the same schedule. Wipe down décor and hides with a reptile-safe disinfectant weekly, and plan on a full substrate change every four to six weeks depending on how the enclosure is holding up. Wash your hands before and after handling your gecko or working in its enclosure, and use feeding tongs rather than fingers to cut down on accidental nips. Keep an eye on appetite, activity, shedding and droppings as part of your normal routine, catching a change early makes almost every health issue easier to manage.

Toxic and Dangerous Hazards

Beyond diet, a few household hazards are worth guarding against. Keep heat lamps, cords and any exposed wiring covered so there’s no risk of burns, and check that all décor is actually stable rather than something that could shift or trap a toe. Only ever offer insects from a reliable feeder supplier, wild-caught insects can carry pesticide residue or parasites you don’t want in the enclosure. Keep cats, dogs and other household pets well away from the setup too, even a curious pet can do real harm to an animal this size.

Visual and Health Checks

A quick visual check every few days catches most problems early. Look for clear, alert eyes, a rounded rather than pinched tail base, steady weight, normal droppings and a complete, even shed. Any gecko that’s lethargic, off its food for more than a few days, or showing laboured breathing should see a reptile-experienced vet promptly.

Sexing

Visual sexing on this species isn’t especially reliable before several months of age. Once a gecko is closer to mature, males typically show a slight swelling at the base of the tail from developing hemipenes, and females tend to run a touch larger overall by adulthood. Even then, a confident call is best left to an experienced handler, especially in a species where the difference is this subtle.

Record Keeping

A simple log covering feeding dates, prey type and supplement schedule, shedding cycles, weight and cleaning dates pays off over time. It makes it far easier to notice a change, an off day with food, an unusual shed, a shift in weight, before it becomes a real problem, and it gives a vet a solid history to work from if you ever need one.

Holiday Care

If you’re away, arrange for a responsible person, ideally another licensed reptile keeper, to take over feeding, temperature checks and cleaning while you’re gone. Write out clear instructions covering the full routine, and make sure whoever’s helping is comfortable with the equipment before you leave.

Transportation

Use a secure, well-ventilated container with a stable base and a simple hide for any trip, whether that’s bringing your gecko home or heading to the vet. Avoid extreme temperatures and sudden jolts, and follow the NSW Code of Practice guidelines for safe reptile transport, keeping the container escape-proof and the gecko as calm as possible the whole way.

Compatibility with Other Animals

Thick-tailed Geckos shouldn’t be housed with other reptile species, differing care needs and the risk of aggression or disease make that a bad combination. Multiple geckos of this species can share an enclosure if matched correctly, one male with one or more females, but adult males should never be housed together. Keep the enclosure well out of reach of cats, dogs and other household pets at all times.

Licensing

A NSW Native Animal Keeper Licence is required before you can legally keep a Thick-tailed Gecko, arranged through Service NSW ahead of purchase. Every gecko sold needs to be captive-bred and come from a licensed breeder or registered pet store, taking one from the wild or releasing a captive animal back into it is against the law. Once you’ve got your licence, ongoing care needs to follow the NSW Code of Practice for the Private Keeping of Reptiles, which covers housing, welfare and record-keeping standards.

Frequently Asked Questions

How big does a Thick-tailed Gecko enclosure need to be?

A single adult does well in an enclosure of at least 30 x 30cm, larger is always fine, since floor space matters more than height for this ground-dwelling species. Because Thick-tailed Geckos stay small their whole lives, most keepers don’t need to upgrade the enclosure as the gecko matures the way owners of larger reptiles do.

How often do Thick-tailed Geckos need to be fed?

Young, still-growing geckos do best on 3 to 4 small crickets or roaches every second day, stepping up to 5 to 6 larger insects every 3 days once fully grown at around 10 to 14cm. Dust with calcium every two to three feeds, add a multivitamin about once a week, and remove anything left uneaten the next morning.

Do Thick-tailed Geckos need UVB lighting?

Not essential. As a nocturnal species that copes poorly with bright light, this gecko can thrive on dietary calcium and vitamin D3 alone. That said, a low-level UVB tube can still support natural vitamin D3 production if you’d rather include it as part of a balanced setup.

Is a Thick-tailed Gecko a good pet for a beginner?

With some homework done beforehand, yes. They’re hardy, tolerate gentle handling reasonably well and don’t need an especially large setup, though correct heating and a properly balanced diet still matter. Most keepers find them a manageable, rewarding species once the basic husbandry is dialled in.

Do I need a licence to keep a Thick-tailed Gecko in NSW?

Yes, this is a native Australian species, so a current Native Animal Keeper Licence through Service NSW is required before you buy one. Keepers also need to follow the NSW Code of Practice for the Private Keeping of Reptiles once their gecko is home.

How long do Thick-tailed Geckos live?

With consistent care, a Thick-tailed Gecko typically lives between 8 and 12 years. Getting the fundamentals right early, correct heating, a varied insect diet, and calcium and vitamin D3 supplementation, gives your gecko the best chance of reaching the upper end of that range.

Visit Us.

Ready to bring one home? Visit our Thick-tailed Geckos for Sale Sydney page, or come see us in-store at 684 Botany Road, Alexandria, our team can walk you through everything you need before your gecko comes home.

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