King’s Skink (Egernia kingii) Care Sheet
King’s Skink (Egernia kingii) is a large, robust Australian skink native to Western Australia. Compared with many smaller members of Egernia, it is a substantial, powerful lizard requiring generous floor space, strong basking heat, effective UVB and a structurally complex enclosure.
King’s Skinks are diurnal omnivores. They naturally spend considerable time basking and foraging and should be provided with opportunities to move between exposed warm areas, cooler retreats, rocks, logs and vegetation.
Like other members of Egernia, they can display complex social behaviour, but compatibility between captive animals must never be assumed. Individual housing is entirely acceptable, while compatible pairs or groups require considerably more space and duplicated resources.
They are live-bearing rather than egg-laying and can be exceptionally long-lived.
Captive-bred animals of documented provenance should always be preferred.
Quick Facts
Scientific name: Egernia kingii
Common name: King’s Skink
Family: Scincidae
Native range: Western Australia
Activity: Diurnal
Lifestyle: Primarily terrestrial; uses rocks, logs, scrub and sheltered crevices
Adult size: Approximately 40–55 cm total length
Lifespan: 20+ years may be achievable with excellent husbandry
Experience level: Intermediate
Diet: Omnivorous
Adult enclosure: Approximately 180 × 60 × 60 cm minimum for one adult; larger strongly preferred
Basking surface: Approximately 40–45°C
Warm ambient: Approximately 28–32°C
Cool area: Approximately 22–26°C
Night temperature: Approximately 18–22°C
UVB: Essential
Target basking UVI: Approximately 3–5
Humidity: Generally moderate to relatively dry with access to more humid sheltered microclimates
Water: Fresh water continuously available
Handling: Usually manageable when established; voluntary interaction preferred
Social housing: Possible with compatible animals but requires substantial space and monitoring
Reproduction: Viviparous — live-bearing
Natural Distribution
King’s Skink is native to:
Western Australia.
It occurs in coastal and inland environments and can make use of:
- Rocky areas
- Coastal scrub
- Woodland
- Dense vegetation
- Fallen timber
- Crevices
- Human-modified environments
Its relatively broad ecological tolerance should not be interpreted as meaning that captive environmental requirements are unimportant.
The enclosure should provide meaningful choice.
Appearance
King’s Skinks are substantial lizards with:
- Robust bodies
- Powerful limbs
- Strong claws
- Broad heads
- Long tails
- Strong scales
Colouration commonly consists of combinations of:
- Brown
- Dark brown
- Black
- Grey
- Cream
with variable patterning.
Adult Size
Adults can reach approximately:
40–55 cm total length.
This makes King’s Skink considerably larger than many commonly maintained Egernia species.
Its enclosure requirements should reflect its:
- Body size
- Activity
- Long lifespan
Behaviour
Normal behaviour can include:
- Basking
- Walking and climbing
- Foraging
- Digging
- Investigating logs and rocks
- Retreating into shelter
- Watching activity outside the enclosure
Established animals can become confident around routine keeper activity.
Diurnal Activity
King’s Skinks are:
day-active basking reptiles.
Their daytime environment should provide:
strong basking heat + UVB + bright visible light.
Temperament
Individuals vary considerably.
Captive-bred animals raised with calm routine interaction may become:
- Confident
- Curious
- Food-motivated
- Tolerant of necessary handling
Others may remain more cautious.
Handling
Frequent handling is unnecessary.
When handling is required:
- Support the body fully
- Keep the animal close to a secure surface
- Avoid squeezing
- Never restrain by the tail
Voluntary interaction should be encouraged wherever practical.
Enclosure Size
King’s Skinks require substantial accommodation.
For one adult, approximately:
180 × 60 × 60 cm
should be regarded as a practical minimum.
An enclosure around:
180–240 × 75–90 × 75–90 cm
provides considerably greater opportunity for natural behaviour.
Why So Large?
A large enclosure allows:
- Proper thermal gradients
- Exercise
- Multiple basking locations
- Large secure hides
- Foraging
- Environmental enrichment
- Greater behavioural choice
Group Housing
Groups or pairs require substantially more space.
Do not place multiple adults into an enclosure designed for one.
Floor Space
Prioritise:
length and depth.
King’s Skinks are primarily terrestrial, although they readily climb onto:
- Rocks
- Logs
- Low branches
- Raised platforms
Enclosure Security
The enclosure should be:
- Strong
- Secure
- Well ventilated
- Escape-proof
Adult King’s Skinks are powerful animals capable of moving poorly secured furnishings.
Substrate
A naturalistic substrate can consist of:
- Organic topsoil
- Washed play sand
- Clay-rich soil
A depth of approximately:
15–25 cm
is useful where enclosure construction permits.
Digging
King’s Skinks may:
- Dig
- Investigate beneath furnishings
- Rearrange substrate
- Create sheltered resting areas
Moisture Gradient
The enclosure should not be uniformly wet or uniformly bone-dry.
Most exposed substrate can remain relatively dry while:
- Lower substrate
- Sheltered corners
- Covered retreats
retain slightly greater moisture.
Hides
Provide multiple secure hides.
At minimum include:
- Warm retreat
- Cool retreat
- More humid retreat
Logs
Large hollow logs and cork structures are particularly useful.
They provide:
- Shelter
- Climbing
- Visual barriers
- Environmental complexity
Rocks
Secure rocks can create:
- Basking platforms
- Hides
- Visual barriers
- Different surface temperatures
Rock Safety
Heavy rocks must be securely supported.
Do not balance heavy structures on loose substrate.
A large skink can dig beneath or move unstable furnishings.
Plants
Safe robust live or artificial plants can provide:
- Visual cover
- Shade
- Environmental complexity
Expect live plants to experience some damage from a large active skink.
Enrichment
Useful enrichment includes:
- Live-prey hunting
- Scattered food
- Leaf litter
- Scent trails
- Multiple basking locations
- Logs
- Different substrate textures
- Occasional safe changes to enclosure layout
Temperature Gradient
Provide a strong daytime thermal gradient.
Basking Surface
Aim approximately for:
40–45°C
at the principal basking surface.
Warm Ambient
Maintain warmer daytime air around:
28–32°C.
Cool Area
Provide cooler areas around:
22–26°C.
Night Temperature
Night temperatures can generally fall to approximately:
18–22°C
for healthy established animals.
Surface Versus Air Temperature
A basking surface measuring 43°C does not mean the entire enclosure should reach 43°C.
The desired gradient is:
hot basking surface → warm zone → cooler zone → sheltered retreat.
Heating
Use overhead daytime heating.
Suitable options include:
- Halogen flood lamps
- Appropriate incandescent basking lamps
For a large adult, more than one appropriately positioned lamp may sometimes be necessary to create a sufficiently broad basking zone.
Broad Basking Area
The basking area should warm much of the animal’s body.
Avoid a tiny hot spot that heats only a small section of a large skink.
Heat Mats
Heat mats should not be relied upon as the principal daytime heat source.
Lamp Safety
Internally mounted heat sources must be appropriately guarded.
Thermostat
Heating equipment should be appropriately controlled while temperatures are checked independently.
Measuring Temperatures
Use:
Digital probe thermometers — ambient temperatures
Infrared thermometer — basking surfaces
Check several locations throughout the enclosure.
UVB
Appropriate UVB should be considered:
essential for comprehensive long-term husbandry.
King’s Skinks are diurnal reptiles naturally exposed to sunlight while basking and foraging.
Target UVI
Aim approximately for:
UVI 3–5 at the principal basking position.
Lower exposure and complete shade must also be available.
What Is UVI?
UVI means Ultraviolet Index.
For reptile keeping, it provides a practical measurement of the biologically effective ultraviolet radiation reaching the animal.
Why UVI Matters More Than the Percentage on the Box
A UVB tube might be labelled:
- 6%
- 7%
- 10%
- 12%
- 14%
But this number alone does not tell you how much UV reaches your skink.
Actual exposure depends on:
- Exact lamp
- Reflector
- Distance
- Mesh
- Lamp age
- Basking height
This is why we give a:
target UVI
rather than prescribing one lamp percentage for every enclosure.
UV Gradient
A useful enclosure should provide approximately:
Main basking position: UVI 3–5
Surrounding illuminated area: UVI 1–3
Partial shade: below UVI 1
Deep shelter: approaching UVI 0
What UVB Lamp Do I Actually Buy?
For an adult King’s Skink, look for a:
QUALITY LINEAR T5 HO UVB SYSTEM.
Do not rely upon a small compact UVB bulb as the primary UV source.
Depending upon enclosure height, mounting method and basking distance, something broadly within the:
6–12% UVB class
may be appropriate.
The correct system is the one that provides approximately:
UVI 3–5 at the animal’s basking position.
Does a Bigger Percentage Mean a Better Lamp?
No.
A 12% tube is not automatically better than a 6% tube.
A moderate-output lamp positioned closer can sometimes produce similar UVI to a stronger lamp positioned farther away.
Distance Matters
In simple terms:
Closer to lamp = generally more UV
Farther from lamp = generally less UV
Mesh = usually reduces UV
Raised basking platform = animal closer to lamp
This is why installation matters just as much as the number printed on the packaging.
What Should I Ask for at an Expo or Reptile Shop?
If you’re unfamiliar with reptile lighting, ask for:
“A quality linear T5 HO UVB system suitable for a large day-active basking skink.”
Explain that the aim is approximately:
UVI 3–5 at the basking position.
Then determine the correct mounting distance for the exact system being purchased.
Don’t Automatically Buy the Strongest Desert Lamp
King’s Skinks come from sunny Australia.
That does not mean:
maximum UV = better husbandry.
Excessive exposure can be harmful.
The objective is:
appropriate exposure + environmental choice.
Heat and UVB Should Overlap
The main basking zone should combine:
HEAT + UVB + BRIGHT VISIBLE LIGHT.
This better recreates natural sunlight.
UV Shade
From the main basking area, the animal should be able to move through:
lower UV → partial shade → complete shade → dark retreat.
Never illuminate every hide with strong UVB.
Large Animal — Large UV Coverage
Because King’s Skinks are large-bodied animals, UVB coverage should extend across a useful proportion of the basking area.
A tiny area of effective UV exposure is not ideal.
Mesh
Mesh between the lamp and animal can reduce UV output.
Account for mesh when determining:
- Lamp strength
- Mounting distance
- Basking height
UV Meter
An appropriate UV Index meter provides the most reliable method of confirming actual exposure.
Measure at approximately:
the height of the animal’s back while basking.
If You Don’t Own a UV Meter
Many new keepers won’t.
Use:
- A reputable T5 HO UVB system
- The manufacturer’s current distance guidance
- Correct basking height
- Appropriate mesh guidance
- Plenty of shade
UVB Replacement
Replace the UVB tube according to the manufacturer’s current guidance.
A tube may continue producing visible light after useful UV output has declined.
Bright Visible Lighting
A bright daylight LED can be used alongside the basking and UVB equipment.
Bright daytime illumination supports:
- Circadian rhythm
- Activity
- Exploration
- Basking
- Natural day/night cues
Photoperiod
Approximately:
11–13 hours of daylight
is suitable through much of the active season.
Seasonal adjustment can be beneficial.
Night Lighting
The enclosure should become:
dark at night.
Visible red, blue or purple night bulbs are unnecessary.
If additional nighttime heat is genuinely required, use an appropriate non-light-emitting heat source under suitable control.
Humidity
King’s Skinks should be provided with a humidity gradient rather than one fixed humidity level throughout the enclosure.
A general exposed ambient range around:
35–55%
can provide a useful starting point.
More humid sheltered microclimates should also be available.
Humid Retreat
Provide a retreat containing slightly more humid substrate.
This can be particularly useful during:
- Shedding
- Very dry environmental conditions
Ventilation
Good ventilation is important.
Avoid permanently:
- Wet substrate
- Saturated conditions
- Stagnant air
Water
Fresh clean water should remain available:
at all times.
Use a stable bowl large enough for easy access but positioned so it does not constantly saturate surrounding substrate.
Diet
King’s Skinks are:
omnivorous.
A varied diet should include:
appropriate plant material + invertebrate prey.
Healthy adults should receive a substantial plant component.
Suitable Greens
Useful options include:
- Dandelion greens
- Endive
- Escarole
- Rocket
- Mustard greens
- Turnip greens
- Other suitable leafy greens
Vegetables
Suitable additions include:
- Squash
- Courgette
- Green beans
- Bell pepper
- Small quantities of grated root vegetables
Edible Flowers
Safe pesticide-free flowers can include:
- Hibiscus
- Dandelion flowers
- Nasturtium
- Rose petals
Invertebrates
Offer a varied rotation including:
- Locusts
- Crickets
- Roaches
- Black soldier fly larvae
- Silkworms
- Mealworms
- Appropriate beetle larvae
- Earthworms from safe sources
- Captive-produced snails
Gut Loading
Feeder insects should be properly gut-loaded for approximately:
24–48 hours
before feeding.
Fruit
Fruit can be offered occasionally in small quantities.
Examples include:
- Berries
- Fig
- Papaya
- Mango
Fruit should remain a:
minor component
rather than a dietary staple.
Vertebrate Foods
Large omnivorous skinks may opportunistically consume vertebrate material.
However, routine rodent feeding is unnecessary and calorie-dense vertebrate foods should not become dietary staples.
Egg
Small amounts of appropriately prepared egg may occasionally be offered for variety.
It should not dominate the diet.
Calcium
Appropriate calcium supplementation should be provided.
Invertebrate prey can be lightly dusted according to:
- Age
- Diet
- UVB provision
- Reproductive condition
Vitamin D3
Where effective UVB is correctly provided, additional dietary vitamin D3 should generally be used sparingly as part of an appropriate supplementation programme.
Multivitamin
A suitable reptile multivitamin can be offered periodically.
Juvenile Feeding
Growing juveniles generally require:
- More frequent meals
- A relatively greater animal-protein component
- Appropriate plant foods
- Calcium supplementation
- Effective UVB
Appropriately sized food can generally be offered:
daily or near-daily
depending upon meal size and body condition.
Adult Feeding
Healthy adults can generally receive meals approximately:
3–5 times per week
depending upon:
- Portion size
- Activity
- Season
- Body condition
Plant material can be offered more frequently than calorie-dense animal foods.
Obesity
King’s Skinks can become overweight.
Monitor:
- Weight
- Body shape
- Activity
Common contributors include:
- Excess fruit
- Excess fatty insects
- Rich animal foods
- Oversized portions
- Inadequate activity
Feeding Enrichment
Encourage natural foraging through:
- Scattered greens
- Hidden food
- Live-prey hunting
- Leaf litter
- Different feeding locations
Social Behaviour
Like other Egernia, King’s Skinks can display relatively complex social behaviour.
Compatible animals may form stable associations.
However:
social does not mean automatically compatible.
Individual Housing
A King’s Skink can be maintained individually.
Keeping a single animal is preferable to forcing incompatible animals to coexist.
Group Housing
Compatible established animals require:
- Considerably larger accommodation
- Multiple basking sites
- Multiple feeding areas
- Numerous retreats
- Visual barriers
Unfamiliar Animals
Introducing unfamiliar adults can result in:
- Chasing
- Biting
- Territorial conflict
- Resource guarding
- Chronic stress
Monitor Every Animal
Check:
- Weight
- Feeding
- Basking
- Activity
- Injuries
- Retreat use
Warning Signs of Social Stress
Watch for:
- Persistent chasing
- Constant hiding
- Weight loss
- Bite injuries
- Reduced basking
- Unequal feeding
Separate incompatible animals.
Sexing
Sexing can be difficult, particularly in younger animals.
Mature males may develop:
- Broader heads
- More robust proportions
but experienced assessment may be necessary.
Reproduction
King’s Skinks are:
viviparous — live-bearing.
They do not lay eggs for external incubation.
Seasonal Cycling
Reproduction may be influenced by:
- Temperature
- Photoperiod
- Feeding
- Seasonal activity
Breeding animals should be in excellent condition before reproductive cycling is attempted.
Pregnancy
A gravid female may:
- Become visibly broader
- Increase basking
- Change feeding behaviour
- Reduce activity later in pregnancy
Female Nutrition
Pregnant females require excellent:
- Calcium availability
- UVB
- Hydration
- Dietary quality
Gestation
Gestation is prolonged and can extend for several months.
Timing varies according to:
- Temperature
- Seasonal conditions
- Individual female
Number of Young
King’s Skinks generally produce relatively small numbers of well-developed young compared with many egg-laying lizards.
Litter size can vary, commonly consisting of:
a few relatively large offspring.
Exact reproductive output should not be treated as fixed.
Neonates
Young are born:
fully formed.
They require:
- Appropriate basking heat
- UVB
- Bright visible lighting
- Secure hides
- Fresh water
- Appropriately sized invertebrates
- Suitable plant foods
Neonate UVB
Provide appropriate UVB from the beginning.
Healthy skeletal development depends upon:
- Calcium
- UVB
- Balanced nutrition
Quarantine
New animals should undergo quarantine before contact with established reptiles.
Approximately:
90 days
is a sensible starting point.
Quarantine Monitoring
Record:
- Weight
- Appetite
- Faeces
- Shedding
- Hydration
- Respiration
- Activity
Veterinary faecal screening is worthwhile for newly acquired animals and animals of uncertain history.
Shedding
Healthy shedding is supported by:
- Appropriate hydration
- Humidity gradients
- Rough furnishings
- Correct nutrition
Check particularly around:
- Toes
- Tail tip
for retained shed.
Common Health Concerns
Metabolic Bone Disease
Inadequate:
- UVB
- Calcium
- Nutrition
can contribute to metabolic bone disease.
Possible signs include:
- Weakness
- Tremors
- Limb deformity
- Jaw abnormalities
- Fractures
Obesity
Overfeeding calorie-dense foods can result in excessive body condition.
Dehydration
Possible signs include:
- Sunken eyes
- Lethargy
- Reduced appetite
- Poor skin condition
Respiratory Disease
Warning signs include:
- Wheezing
- Clicking
- Nasal discharge
- Excess mucus
- Persistent abnormal open-mouth breathing
Parasites
Possible signs include:
- Weight loss
- Poor body condition
- Persistent abnormal faeces
- Reduced appetite
Social Injuries
Cohabited animals should be checked for:
- Bite wounds
- Damaged toes
- Missing scales
- Tail injuries
Signs of Good Health
A healthy King’s Skink should generally display:
- Clear alert eyes
- Strong coordinated movement
- Regular basking
- Active exploration
- Normal retreat behaviour
- Good feeding response
- Healthy skin
- Normal faeces
- Appropriate muscular body condition
When to Seek Veterinary Advice
Consult a suitably experienced reptile veterinarian for:
- Persistent food refusal
- Significant unexplained weight loss
- Severe lethargy
- Weakness
- Tremors
- Limb or jaw abnormalities
- Respiratory symptoms
- Persistent abnormal faeces
- Significant injuries
- Reproductive difficulties
- Any substantial unexplained behavioural change
Common Husbandry Mistakes
Enclosure too small
King’s Skinks are large, active and long-lived.
Insufficient floor space
Prioritise usable length and depth.
Sparse enclosure
Provide logs, rocks, hides and visual barriers.
Unstable heavy furnishings
Large adults can move or undermine structures.
Whole enclosure too hot
Provide a genuine cool zone.
Basking area too small
A large-bodied skink requires a broad basking zone.
Basking temperature too low
Provide an appropriately hot surface.
Using a heat mat as the main heat source
Use overhead daytime heating.
No UVB
Appropriate UVB is essential for comprehensive husbandry.
Relying on a small compact UVB lamp
A quality linear T5 HO system provides much better coverage.
Buying UVB only by percentage
Actual UVI at the animal matters.
Buying the strongest UVB because the animal is Australian
Stronger is not automatically better.
No UV shade
The skink must be able to escape ultraviolet exposure.
Dim daytime enclosure
Provide bright visible daytime illumination.
Feeding only insects
King’s Skinks are omnivorous.
Too much fruit
Fruit should remain occasional.
Excess rich animal foods
These can contribute to obesity.
Poor gut loading
Feeder quality directly influences dietary quality.
Assuming social means any animals can live together
Compatibility must be carefully assessed.
Australian Provenance
King’s Skinks are native Australian reptiles.
Australia maintains strict controls concerning wildlife export.
Animals established in European collections generally descend from historical captive populations rather than recent commercial export from Australia.
Retain available:
- Breeder information
- Purchase records
- Parentage information
- Transfer records
- Relevant legal documentation
Captive-bred animals from traceable established lines should be preferred.
Responsible Ownership Checklist
Before acquiring a King’s Skink, ensure you can provide:
- Approximately 180 × 60 × 60 cm minimum adult accommodation
- Larger accommodation strongly preferred
- Substantially greater space for multiple animals
- Secure hides
- Stable rocks and logs
- Deep naturalistic substrate
- 40–45°C basking surface
- 28–32°C warm ambient area
- 22–26°C cool area
- Appropriate nighttime temperature reduction
- Quality linear T5 HO UVB
- Approximately UVI 3–5 at the basking position
- Complete UV shade
- Bright visible daytime lighting
- Fresh water continuously
- Varied omnivorous diet
- Appropriate leafy plant material
- Varied gut-loaded invertebrates
- Appropriate calcium and vitamin supplementation
- Careful social monitoring where animals are cohabited
- Long-term reptile veterinary care
- Appropriate provenance records
Husbandry Summary
Adult enclosure: 180 × 60 × 60 cm minimum; larger strongly preferred
Lifestyle: Primarily terrestrial
Adult size: Approximately 40–55 cm
Substrate: Naturalistic soil/sand/clay mixture
Basking surface: 40–45°C
Warm ambient: 28–32°C
Cool area: 22–26°C
Night: Approximately 18–22°C
Humidity: Approximately 35–55% exposed ambient with more humid sheltered microclimates
UVB: Linear T5 HO UVB
Target basking UVI: Approximately 3–5
Visible lighting: Bright daylight illumination strongly recommended
Diet: Omnivorous — appropriate plant foods plus varied invertebrates
Water: Available continuously
Handling: Limited; voluntary interaction preferred
Social housing: Possible with compatible established animals; substantial space required
Reproduction: Live-bearing
Quarantine: Approximately 90 days as a sensible starting point
Lifespan: Potentially 20+ years
Provenance: Retain breeder and acquisition records
UVB — What Do I Actually Need to Buy?
If you’re setting up a King’s Skink enclosure and the UVB choices seem confusing, start with:
A QUALITY LINEAR T5 HO UVB SYSTEM.
Do not rely on a little compact UVB bulb as the primary source for a large adult enclosure.
Depending upon your enclosure height and how the lamp is installed, a tube broadly within the:
6–12% UVB class
may be suitable.
But the percentage printed on the box is not the target.
The target is approximately:
UVI 3–5 at the skink’s back while it is using its main basking position.
Why does this matter?
Because:
Closer lamp = generally more UV
Farther away = generally less UV
Mesh between lamp and animal = usually less UV
Higher basking platform = animal closer to UVB
This means one keeper may correctly use a moderate-output tube while another enclosure requires a stronger one.
For a King’s Skink, also remember that this is a large-bodied lizard. The effective UVB and heat should cover a useful basking area rather than creating one tiny spot.
At a reptile shop or expo, you can ask for:
“A linear T5 HO UVB system suitable for a large, day-active basking skink. I need approximately UVI 3–5 at the basking position.”
Then establish the correct distance for the exact system you purchase.
The main basking area should combine:
HEAT + UVB + BRIGHT VISIBLE LIGHT.
From there, provide:
lower UV → partial shade → complete shade → dark retreat.
And remember:
Basking lamp = HEAT
T5 HO UVB tube = ULTRAVIOLET
Daylight LED = BRIGHT VISIBLE LIGHT
They perform different jobs.
Do not try to make the entire enclosure UVI 3–5.
The skink needs to be able to decide:
when to bask, when to receive UV and when to retreat completely.
The goal is not the strongest lamp available.
The goal is:
the correct UV exposure across a useful basking area, with a proper gradient down to complete shade.
IMPORTANT INFORMATION
This care sheet provides general husbandry guidance and does not replace species-specific research or veterinary advice. Individual requirements may vary.
Always check current legislation governing the acquisition, collection, import, transport, keeping, breeding or sale of reptiles in your jurisdiction. For Australian native species maintained outside Australia, retain appropriate provenance and acquisition records.
If you have concerns about an animal’s health or care, consult a suitably experienced exotic or reptile veterinarian.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026