Southwestern Carpet Python (Morelia spilota imbricata) Care Sheet
The Southwestern Carpet Python is a large Australian python native to southwestern and parts of southern Western Australia. It belongs to the Carpet Python complex and is adapted to a considerably more temperate and seasonally variable climate than tropical forms such as the Darwin Carpet Python.
These snakes are powerful, active and capable climbers that utilise trees, rocky environments and ground-level refuges. Captive-bred animals can become relatively manageable, although individuals vary and juveniles may initially be defensive.
Their natural climate is particularly important when planning captive husbandry. Southwestern Carpet Pythons should have access to a defined basking area while retaining extensive cooler regions and appropriate nighttime and seasonal temperature variation.
Quick Facts
Scientific name: Morelia spilota imbricata
Common names: Southwestern Carpet Python / Southwest Carpet Python
Family: Pythonidae
Origin: Southwestern and southern Western Australia
Adult size: Commonly approximately 180–240 cm (6–8 ft), with larger individuals possible
Lifespan: Approximately 20–30+ years with appropriate care
Activity: Primarily crepuscular and nocturnal, with daytime basking occurring
Lifestyle: Terrestrial to semi-arboreal
Diet: Carnivorous
Reproduction: Egg-laying
Temperament: Generally manageable when established; individuals vary
Experience level: Intermediate
Taxonomy
The Southwestern Carpet Python is traditionally classified as:
Morelia spilota imbricata
It forms part of the wider Carpet Python complex.
Taxonomic treatment of Morelia spilota populations has changed over time and may continue to be revised.
For captive breeding purposes, accurate records concerning:
- Parentage
- Locality
- Lineage
should be retained wherever possible.
Natural History
Southwestern Carpet Pythons occur across parts of Western Australia’s southwest and southern regions.
Habitats can include:
- Woodland
- Forest
- Heathland
- Coastal scrub
- Rocky environments
- Agricultural landscapes
- Riverine vegetation
They may also occur around human-modified environments where suitable shelter and prey remain available.
Climate
The natural range experiences considerably greater seasonal variation than tropical northern Australia.
Depending upon locality, animals may experience:
- Warm to hot summer days
- Cool nights
- Mild transitional seasons
- Cool winter conditions
- Seasonal rainfall
- Considerable daily temperature variation
Captive husbandry should therefore focus on providing thermal choice rather than maintaining the snake at a continuously high temperature.
Habitat Use
Southwestern Carpet Pythons utilise both ground-level and elevated environments.
Natural retreats may include:
- Tree hollows
- Hollow logs
- Rock crevices
- Dense vegetation
- Other protected cavities
They are accomplished climbers and should have access to substantial elevated structures in captivity.
Appearance
Southwestern Carpet Pythons are variable in appearance.
Typical colours may include:
- Brown
- Olive
- Grey
- Tan
- Cream
- Yellow
- Dark brown
Patterns generally consist of irregular bands, blotches and mottling.
Colour and pattern can vary according to geographical origin and individual variation.
Adult Size
Adults commonly reach approximately:
180–240 cm (6–8 ft)
although larger individuals can occur.
Females may become particularly substantial.
These are muscular, active snakes requiring sufficient space for:
- Full-body movement
- Climbing
- Exploration
- Basking
- Concealment
- Thermoregulation
Enclosure
For an average adult, approximately:
240 × 90 × 120 cm (8 × 3 × 4 ft)
should be considered a useful practical minimum starting point.
Large individuals should receive correspondingly larger accommodation.
The enclosure should provide:
- Generous floor space
- Strong climbing branches
- Elevated platforms
- Multiple hides
- Suitable substrate
- Fresh water
- Broad thermal gradient
- Environmental enrichment
Juvenile Enclosures
Juveniles can initially be maintained in smaller secure accommodation.
Provide:
- Warm-side hide
- Cool-side hide
- Elevated retreats
- Climbing branches
- Fresh water
- Suitable substrate
- Environmental cover
Young Carpet Pythons may become defensive when excessively exposed.
Multiple secure retreats can help reduce stress.
The enclosure should be upgraded progressively as the snake grows.
Enclosure Security
Southwestern Carpet Pythons are strong and inquisitive.
Enclosures require:
- Strong doors
- Reliable locks
- Secure ventilation
- Protected cable openings
Young snakes can exploit surprisingly small gaps.
Adult snakes can exert considerable pressure against poorly secured doors and fittings.
All climbing structures must be securely anchored.
Hides
Provide at least:
- One warm-side hide
- One cool-side hide
Additional retreats at intermediate temperatures are strongly encouraged.
Elevated hides can also be valuable.
Suitable options include:
- Cork bark
- Hollow logs
- Artificial rock shelters
- Purpose-built reptile hides
- Elevated hide boxes
The snake should be able to remain concealed while choosing between different temperatures.
Climbing Opportunities
Southwestern Carpet Pythons are capable climbers and should be provided with substantial elevated structures.
Suitable furnishings include:
- Thick branches
- Logs
- Horizontal perches
- Shelves
- Elevated platforms
Different diameters and orientations increase behavioural choice.
All structures must safely support the full weight of an adult.
Substrate
Suitable substrates include:
- Reptile-safe soil
- Naturalistic soil mixtures
- Coconut husk
- Suitable bark-based reptile substrates
- Other low-dust reptile-safe materials
The substrate should support appropriate humidity without remaining permanently wet.
Avoid:
- Cedar
- Pine
- Artificially scented substrates
- Excessively dusty materials
Spot-clean waste promptly.
Temperature & Heating
Provide a broad thermal gradient.
During the active season, suitable temperatures are approximately:
Basking surface: 31–33°C
Warm ambient area: approximately 25–28°C
Cooler area: approximately 20–24°C
Night: approximately 17–21°C
Seasonal variation can be incorporated for healthy established animals.
The snake must always be able to move away from the heat source.
The entire enclosure should never be maintained at basking temperature.
Basking
Southwestern Carpet Pythons may voluntarily bask.
A defined basking area allows the snake to warm efficiently before moving back into cooler surroundings.
The basking zone should be large enough to warm a useful portion of the body.
Surface temperatures should be checked using an infrared thermometer.
Heating
Suitable heating systems may include appropriately installed:
- Halogen basking lamps
- Deep heat projectors
- Ceramic heat emitters
depending upon enclosure design and ambient room temperatures.
All heating equipment must be appropriately thermostatically controlled.
Internally mounted heating equipment accessible to the snake must be securely guarded.
Nighttime Cooling
Meaningful nighttime cooling is appropriate for healthy established Southwestern Carpet Pythons.
During much of the active season, nighttime temperatures around:
17–21°C
can be suitable.
The precise conditions should take account of:
- Age
- Health
- Season
- Enclosure design
- Geographic ancestry where known
Very young, sick or compromised animals may require modified conditions.
Seasonal Cooling
Healthy adult Southwestern Carpet Pythons naturally experience seasonal temperature changes.
Captive winter management may incorporate cooler conditions and reduced photoperiod.
Deliberate cooling should only be undertaken when:
- The animal is healthy
- Body condition is appropriate
- Temperatures can be accurately monitored
- The keeper understands seasonal management
Cooling should occur gradually rather than abruptly.
Winter Management
During cooler periods, Southwestern Carpet Pythons may:
- Become less active
- Feed less frequently
- Stop feeding temporarily
- Spend longer periods concealed
- Alter basking behaviour
Feeding should be adjusted according to environmental temperature and activity.
Do not offer substantial meals when the snake lacks appropriate temperatures for digestion.
Previous meals should be fully digested before significant seasonal cooling occurs.
Humidity
Southwestern Carpet Pythons generally do not require continuously high tropical humidity.
A useful general range is approximately:
40–60% relative humidity
with natural fluctuations.
Humidity may temporarily increase during:
- Shedding
- Misting
- Seasonal rainfall simulation
Good ventilation remains essential.
Seasonal Humidity
Southwestern Australia experiences seasonal rainfall patterns.
Captive conditions can incorporate moderate seasonal changes in humidity.
This does not mean maintaining the enclosure continuously wet.
The snake should always have access to:
- Dry resting areas
- Fresh drinking water
- A humid microclimate when required
Humid Hide
A humid retreat can be particularly useful during shedding.
Suitable materials include:
- Damp sphagnum moss
- Moist coconut fibre
- Other appropriate moisture-retaining substrate
The contents should remain moist rather than saturated.
The hide should be checked and cleaned regularly.
Water
Fresh drinking water should be available at all times.
Provide a large, stable water container.
The bowl should allow comfortable drinking and optional soaking where practical.
Water should be:
- Checked daily
- Changed regularly
- Replaced immediately when contaminated
The container should be thoroughly cleaned as required.
Lighting
Provide a clear day/night cycle.
Approximately:
10–12 hours of light per day
can be used during much of the active season.
Seasonal variation in photoperiod can also be incorporated.
Bright visible daytime lighting supports normal circadian rhythms and encourages natural basking behaviour.
The enclosure should become genuinely dark at night.
Avoid red, blue or purple nighttime bulbs.
UVB
Low-level UVB can be incorporated into modern Southwestern Carpet Python husbandry.
A useful exposed basking target may be approximately:
UVI 1–2
with shaded areas and retreats providing negligible exposure.
The snake must always be able to regulate its own exposure.
Actual UV intensity depends upon:
- Lamp output
- Reflector
- Distance
- Mesh
- Basking position
Environmental Enrichment
Southwestern Carpet Pythons are active snakes that benefit considerably from environmental complexity.
Suitable enrichment includes:
- Strong branches
- Logs
- Cork bark
- Rock-style structures
- Multiple hides
- Elevated platforms
- Different substrate depths
- Leaf litter
- Vegetation
- Scent trails
- Occasional changes in enclosure layout
The environment should encourage:
- Exploration
- Climbing
- Basking
- Concealment
- Foraging
- Thermoregulation
Diet
Southwestern Carpet Pythons are carnivorous constrictors.
Wild prey can include:
- Rodents
- Other small mammals
- Birds
- Reptiles
- Other appropriately sized vertebrates
Captive-bred animals generally feed readily on appropriately sized whole prey.
Rodents can form the primary captive diet.
Frozen-Thawed Prey
Appropriately prepared frozen-thawed prey is strongly preferred.
This eliminates the risk of live rodents biting or otherwise injuring the snake.
Frozen prey should be:
- Completely thawed
- Appropriately warmed
- Presented using feeding tongs
Never microwave whole frozen prey because uneven heating can create dangerous internal hot spots.
Prey Size
Offer prey appropriate to the snake’s size and body condition.
A meal should create a modest visible swelling rather than extreme distension.
Oversized prey can increase the risk of:
- Regurgitation
- Digestive difficulty
- Injury
- Excessive calorie intake
Feeding Frequency
Juveniles can generally be offered appropriately sized prey approximately:
Every 5–7 days
depending upon growth and body condition.
Subadults may generally be fed approximately:
Every 7–10 days.
Healthy adults can generally be fed approximately:
Every 10–14 days
or at longer intervals depending upon:
- Prey size
- Activity
- Body condition
- Season
Adult feeding frequency may decrease substantially during cooler periods.
Feeding & Seasonal Temperature
Feeding should always be considered alongside environmental temperature.
An animal undergoing significant seasonal cooling should not be fed as though it were being maintained under summer conditions.
The previous meal should be completely digested before substantial cooling occurs.
Normal seasonal appetite reduction should not automatically be treated as a feeding problem in an otherwise healthy adult.
Feeding Response
Southwestern Carpet Pythons can possess strong feeding responses.
Useful management practices include:
- Using feeding tongs
- Washing hands after handling prey
- Avoiding prey scent during routine maintenance
- Establishing predictable enclosure routines
- Target or tap training where appropriate
Always establish the snake’s position and behaviour before reaching into the enclosure.
Obesity
Overfeeding can result in obesity.
Monitor:
- Body shape
- Muscle tone
- Activity
- Weight trends
A healthy Southwestern Carpet Python should remain muscular rather than excessively rounded.
Feeding should be based upon body condition rather than appetite alone.
Handling
Captive-bred Southwestern Carpet Pythons often become relatively manageable with calm, consistent husbandry.
Juveniles may initially be defensive.
When handling:
- Move calmly
- Support the body
- Avoid grabbing the head
- Avoid tight restraint
- Allow controlled movement
Large adults remain powerful animals and should be handled appropriately.
Juvenile Defensive Behaviour
Young Southwestern Carpet Pythons may:
- Form an S-shaped posture
- Strike
- Hiss
- Attempt to flee
This behaviour often decreases as the animal matures and becomes established.
Excessive forced handling of a frightened juvenile may increase stress.
Secure accommodation and predictable husbandry should come first.
Handling After Feeding
Avoid unnecessary handling for approximately:
48–72 hours after feeding
and longer following substantial meals.
Handling too soon can increase the risk of regurgitation.
Allow the snake to digest undisturbed at appropriate temperatures.
Shedding
Signs of an approaching shed include:
- Dull colouration
- Cloudy or blue eyes
- Reduced activity
- Possible temporary feeding refusal
Appropriate hydration and access to suitable humidity generally support normal shedding.
After shedding, check:
- Eye caps
- Tail tip
- Overall skin
Repeated incomplete shedding indicates that humidity, hydration or general health should be reviewed.
Housing Multiple Snakes
Individual housing is generally recommended.
Southwestern Carpet Pythons do not require companionship.
Separate housing allows accurate monitoring of:
- Feeding
- Faeces
- Shedding
- Body condition
- Health
It also reduces competition and feeding accidents.
Animals should only be introduced for breeding under controlled conditions.
Health
Potential health concerns include:
- Respiratory infections
- Mouth infections
- Scale problems
- Burns
- Dehydration
- Retained shed
- External parasites
- Internal parasites
- Regurgitation
- Obesity
- Reproductive complications
Warning signs include:
- Significant unexplained weight loss
- Persistent refusal to feed outside expected seasonal patterns
- Repeated regurgitation
- Wheezing
- Open-mouth breathing
- Nasal discharge
- Excessive saliva
- Mouth swelling
- Neurological abnormalities
- Significant behavioural changes
Persistent or serious symptoms require assessment by a suitably experienced reptile/exotic veterinarian.
Respiratory Disease
Respiratory problems can be associated with inappropriate combinations of:
- Temperature
- Humidity
- Ventilation
- Hygiene
Cool nighttime temperatures alone should not automatically be assumed to cause respiratory disease.
Healthy Southwestern Carpet Pythons naturally experience substantial temperature variation.
Suspected respiratory disease requires veterinary assessment.
Burns
Because Carpet Pythons climb well, heating equipment positioned high within the enclosure can still be reached.
Prevent thermal injury by:
- Thermostatically controlling heat sources
- Guarding internally mounted equipment
- Measuring surface temperatures
- Preventing access to hot fittings
Suspected burns require prompt veterinary attention.
Quarantine
All newly acquired Southwestern Carpet Pythons should undergo quarantine away from established reptiles.
During quarantine:
- Record body weight
- Monitor feeding
- Examine faeces
- Check skin
- Monitor breathing
- Check carefully for mites
- Observe behaviour
- Maintain separate equipment
Veterinary faecal testing may be appropriate where an animal’s previous history is uncertain.
Captive-bred animals should be strongly preferred.
Sexing
Southwestern Carpet Pythons can be sexed using established professional snake-sexing techniques.
These procedures should only be performed by an experienced person.
Incorrect probing can cause serious injury.
External appearance alone should not be relied upon for definitive sex determination.
Breeding
Southwestern Carpet Pythons are egg-laying snakes.
Breeding should only be attempted with healthy mature animals in appropriate body condition.
Successful breeding requires knowledge of:
- Accurate sexing
- Sexual maturity
- Seasonal cycling
- Pair introduction
- Courtship
- Female condition
- Egg development
- Egg laying
- Incubation
- Hatchling husbandry
Animals should not simply be permanently housed together for breeding.
Seasonal Cycling for Breeding
Seasonal cycling can play an important role in reproduction.
Breeding programmes may incorporate controlled changes to:
- Nighttime temperatures
- Daytime temperatures
- Photoperiod
- Feeding
Only healthy mature animals in suitable body condition should undergo deliberate cooling.
Temperature reduction should occur gradually and previous meals should be completely digested beforehand.
Pair Introduction
Breeding introductions should be carefully supervised.
Monitor for:
- Courtship
- Copulation
- Stress
- Defensive behaviour
Animals should be separated if either individual appears persistently stressed.
Accurate breeding records should be maintained.
Egg Laying
Females require access to a secure laying area containing appropriate moisture-retaining substrate.
The laying site should provide:
- Privacy
- Appropriate moisture
- Suitable temperature
- Enough room for the female to coil comfortably
Females should be monitored carefully during the reproductive period.
Difficulty laying eggs can become a veterinary emergency.
Maternal Incubation
Female Southwestern Carpet Pythons may coil around their eggs.
Maternal incubation may be possible where environmental conditions are carefully controlled.
Artificial incubation may also be used.
The chosen method should be thoroughly researched before breeding occurs.
Artificial Incubation
Eggs require carefully controlled:
- Temperature
- Moisture
- Gas exchange
Eggs should not be unnecessarily rotated after development has begun.
Breeders should research current species-specific incubation protocols before attempting reproduction.
Hatchlings
Hatchlings require:
- Secure individual accommodation
- Appropriate thermal gradients
- Multiple small hides
- Elevated retreats
- Fresh water
- Suitable substrate
- Climbing opportunities
- Appropriately sized prey
Young animals may initially be defensive.
Providing abundant secure cover and minimising unnecessary disturbance can help them become established.
Each hatchling should be monitored individually for:
- First shed
- Feeding
- Body weight
- Defecation
- Normal development
Lineage & Locality
Accurate records are important within the Carpet Python complex.
Where locality information is available, it should be retained.
Records should include where possible:
- Parent identification
- Geographic origin
- Hatch date
- Sex
- Feeding history
- Breeding history
- Lineage
This is particularly important where animals are retained for future breeding.
Hybridisation
Different Carpet Python forms can interbreed in captivity.
Where animals are represented as pure Southwestern Carpet Pythons, breeders should maintain accurate lineage records.
Animals containing ancestry from other Carpet Python forms should be represented accurately.
Hybridisation should never be concealed or misrepresented.
Maintaining clear records protects the integrity of established captive lines.
Responsible Sourcing
Captive-bred Southwestern Carpet Pythons should be strongly preferred.
Before acquiring an animal, establish where possible:
- Captive-bred status
- Age
- Sex
- Feeding history
- Health history
- Lineage
- Locality where known
A well-established captive-bred animal with a documented feeding history is preferable.
Responsible Ownership
Southwestern Carpet Pythons can live for 20–30 years or longer with appropriate care.
Before acquiring one, consider:
- Adult size
- Large enclosure requirements
- Climbing requirements
- Seasonal temperature management
- Strong feeding response
- Whole-prey feeding
- Specialist veterinary care
- Long lifespan
Their adaptation to a temperate climate does not mean they should simply be kept cold.
Successful husbandry depends upon providing appropriate basking opportunities alongside genuinely cooler areas and seasonal variation.
Never release a captive snake into the wild.
Summary
The Southwestern Carpet Python is an impressive Australian python adapted to the seasonally variable environments of southwestern and southern Western Australia.
Successful husbandry depends upon providing a large and secure enclosure, substantial climbing opportunities, multiple retreats, a defined basking area, a broad thermal gradient, meaningful nighttime and seasonal temperature variation, moderate humidity, fresh water, environmental enrichment and appropriately sized whole prey.
Its environmental requirements should not simply be copied from tropical Carpet Python forms. Providing behavioural choice and appropriate seasonal variation is central to successful long-term care.
With sufficient space, responsible feeding, accurate lineage management and carefully controlled environmental conditions, Morelia spilota imbricata can thrive in captivity for decades.
IMPORTANT INFORMATION
This care sheet provides general husbandry guidance and does not replace species-specific research or veterinary advice. Individual requirements may vary.
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