Giant Huntsman Spider (Heteropoda maxima) Care Sheet
The Giant Huntsman Spider (Heteropoda maxima) is an exceptionally large huntsman spider known for its enormous leg span, flattened body and extraordinary speed.
Native to Laos, Heteropoda maxima is often described as one of the world’s largest spiders by leg span. Unlike tarantulas, huntsman spiders do not rely on a permanent prey-catching web. They are active hunters that use speed, camouflage and rapid bursts of movement to capture prey.
The species has a distinctive laterigrade stance, with the legs extending sideways in a crab-like arrangement. This allows the spider to flatten itself against bark, rock and other surfaces and move extremely quickly in multiple directions.
Despite its impressive size, the Giant Huntsman is not an animal that benefits from routine handling. Its speed alone makes handling impractical, and a defensive bite remains possible. It is best maintained as a hands-off display species.
Successful husbandry requires a secure vertically orientated enclosure, abundant bark and narrow retreats, good ventilation, moderate-to-high humidity without stagnant conditions, suitable temperatures, appropriately sized live prey and careful hands-off maintenance.
Quick Facts
Scientific name: Heteropoda maxima
Common name: Giant Huntsman Spider
Order: Araneae
Family: Sparassidae
Origin: Laos
Lifestyle: Nocturnal wandering hunter
Adult body length: Approximately 4–5 cm
Leg span: Can approach approximately 25–30 cm in exceptionally large specimens
Diet: Carnivorous
Activity: Primarily nocturnal
Temperature: Approximately 24–28°C
Humidity: Moderate to high
Housing: Individual
Web type: Does not construct a conventional prey-catching web
Speed: Extremely fast
Handling: Not recommended
Experience level: Intermediate to advanced
Major requirements: Extremely secure enclosure, vertical retreats, ventilation and careful maintenance
Natural Distribution
Heteropoda maxima is known from:
Laos in Southeast Asia.
The species has been associated particularly with limestone cave environments.
Natural Habitat
Its natural environment includes:
- Limestone cave systems
- Rocky crevices
- Vertical surfaces
- Humid sheltered areas
The species’ flattened body allows it to exploit narrow spaces.
Cave Association
Although associated with caves, captive specimens should not simply be placed into a permanently dark, wet and poorly ventilated container.
The enclosure should reproduce the important functional elements of the habitat:
- Secure retreats
- Vertical surfaces
- Warmth
- Humidity
- Ventilation
Appearance
The Giant Huntsman Spider has the characteristic flattened appearance of the family Sparassidae.
Its most striking feature is the extraordinary span of its:
long laterigrade legs.
Laterigrade Legs
Laterigrade means that the legs extend primarily:
sideways from the body.
This produces the distinctive crab-like posture associated with huntsman spiders.
Why the Body Is Flat
The flattened body allows the spider to squeeze into narrow spaces beneath:
- Bark
- Rock
- Crevices
- Other tight retreats
Captive housing should provide similar narrow hiding opportunities.
Size
The body itself is much smaller than the spider’s overall footprint.
Adults may reach approximately:
4–5 cm in body length.
Leg Span
Large individuals can possess an enormous leg span.
Figures approaching:
25–30 cm
are associated with exceptionally large specimens.
Leg span should not be confused with body length.
Behaviour
Heteropoda maxima is an:
active nocturnal predator.
It does not sit permanently in a prey-catching web waiting for food.
Hunting
The spider hunts using:
- Vision
- Vibration detection
- Speed
- Ambush
- Rapid pursuit
Prey can be seized extremely quickly.
Speed
Huntsman spiders are renowned for their:
exceptional speed.
This is one of the most important considerations for captive husbandry.
Direction Changes
A huntsman can move rapidly:
- Forward
- Sideways
- Backwards
- Around enclosure furnishings
The spider may change direction much faster than an inexperienced keeper expects.
Escape Risk
An unsecured huntsman can leave an enclosure within seconds.
All maintenance should therefore be:
planned before the enclosure is opened.
Housing
A vertically orientated enclosure works well.
Suitable housing includes:
- Tall glass terrariums
- Acrylic spider enclosures
- Secure custom arboreal enclosures
Enclosure Size
For a large adult, approximately:
30 × 30 × 45 cm or larger
provides a useful starting point.
A larger enclosure may be used provided prey can still be monitored effectively.
Width
Although vertical space is important, do not make the enclosure excessively narrow.
The spider’s enormous leg span requires:
substantial horizontal room as well.
Secure Door
The enclosure door must close:
completely and securely.
Tiny gaps around sliding doors or ventilation panels should be checked carefully.
Door Position
Front-opening enclosures can be useful because they reduce the need to disturb the entire upper area during maintenance.
However, always check where the spider is positioned before opening the door.
Ventilation
Good ventilation is essential.
The species should not be kept in:
stagnant, permanently saturated conditions.
Cross Ventilation
Cross ventilation is particularly useful.
Ventilation openings on more than one side encourage gentle air movement.
Ventilation Security
All ventilation holes must be small enough to prevent escape.
This is especially important when housing:
juveniles or spiderlings.
Substrate
Suitable substrate can include:
- Coco fibre
- Organic topsoil
- Soil/coco mixtures
Substrate Depth
Approximately:
5–8 cm
is adequate for moisture retention and enclosure stability.
This species does not require the extremely deep burrowing substrate used for fossorial tarantulas.
Substrate Moisture
Maintain part of the substrate:
slightly moist.
Do not keep it permanently saturated.
Moisture Gradient
Allow some variation between:
- Slightly moister areas
- Somewhat drier areas
This provides the spider with greater choice.
Bark Retreats
Large slabs of:
cork bark
are among the most useful furnishings.
Vertical Cork
Position cork bark vertically or at a slight angle.
This provides:
- Climbing surfaces
- Dark retreats
- Narrow gaps
- Naturalistic hunting areas
Narrow Retreat
A particularly useful arrangement is a secure narrow gap between:
a cork slab and the enclosure wall.
The spider can flatten itself into this space during daylight.
Secure Furnishings
All bark, branches and decorations must be stable.
Do not create structures that can collapse onto the spider.
Artificial Plants
Artificial vegetation can provide:
- Additional cover
- Visual barriers
- Climbing structure
Avoid sharp plastic edges.
Live Plants
Suitable pesticide-free live plants can be used in naturalistic enclosures.
They can help create a visually attractive humid environment.
However, plants must not make it impossible to locate the spider before maintenance.
Temperature
A useful general range is approximately:
24–28°C.
Around:
25–27°C
works well for many captive tropical huntsman spiders.
Night Temperature
A modest nighttime reduction is acceptable.
Avoid prolonged cool conditions.
Excessive Heat
Avoid prolonged temperatures above approximately:
30°C.
Overheating can cause rapid dehydration and death.
Heating
Where additional heat is required, warming the room is often preferable.
If external heating equipment is used, it should be:
thermostatically controlled.
Heat Mats
Never heat the entire enclosure indiscriminately.
If supplemental external heat is necessary, provide a thermal gradient so the spider can move away from the warmer area.
Thermostat
Any dedicated heating device should be controlled by:
a reliable thermostat.
Direct Sunlight
Never place the enclosure in direct sunlight.
A glass or acrylic enclosure can overheat extremely rapidly.
Humidity
Moderate-to-high humidity is appropriate.
Approximately:
65–80% relative humidity
provides a useful broad guide.
Humidity Is Not Wetness
Do not attempt to maintain humidity by soaking the entire enclosure.
The aim is:
humid air and access to moisture combined with good ventilation.
Misting
Light misting can be used periodically.
Mist part of the enclosure rather than flooding every surface.
Drying
Allow some surfaces to dry between mistings.
Constantly wet conditions can encourage:
- Mould
- Mites
- Stagnant air
- Poor substrate conditions
Water Dish
Provide a shallow:
clean water dish.
The dish should be stable and easy to access.
Water Dish Size
An adult should be able to drink comfortably from the edge.
A huge deep pool is unnecessary.
Water Maintenance
Replace the water regularly.
Clean the dish if it becomes contaminated with:
- Substrate
- Prey remains
- Waste
Lighting
Specialised lighting is unnecessary.
Provide a normal:
day/night cycle.
UVB
Dedicated UVB lighting is not required.
Bright Lighting
Avoid extremely bright lighting directly over the spider’s retreat.
A shaded enclosure with secure hiding areas better suits its nocturnal behaviour.
Nocturnal Activity
The spider may remain hidden for much of the day.
After dark it may:
- Leave its retreat
- Explore enclosure walls
- Hunt
- Reposition itself
This is normal.
Feeding
Heteropoda maxima is a:
carnivorous predator.
It should be offered appropriately sized captive-bred invertebrate prey.
Suitable Prey
Suitable prey can include:
- Crickets
- Locusts
- Cockroaches
- Other appropriate captive-bred feeder insects
Prey Size
Prey should generally be:
no larger than the spider can overpower safely.
There is no benefit to offering unnecessarily large prey.
Feeding Frequency
A healthy adult can generally be offered suitable prey approximately:
once or twice per week.
Adjust according to:
- Abdomen condition
- Prey size
- Temperature
- Moulting cycle
Juvenile Feeding
Juveniles require:
- Smaller prey
- More appropriately frequent meals
Prey size should increase gradually as the spider grows.
Overfeeding
Avoid excessive feeding.
A constantly overextended abdomen increases the risk of injury.
Body Condition
The abdomen provides a useful visual indication of general feeding condition.
An extremely swollen abdomen may indicate that feeding should be reduced.
Remove Uneaten Prey
Remove uneaten prey after a reasonable period.
This becomes particularly important when the spider approaches:
moulting.
Pre-Moult
Before moulting, a spider may:
- Refuse food
- Become less active
- Remain hidden
- Produce additional silk
- Appear darker
Do Not Force Feed
Food refusal before moulting is:
normal.
Do not repeatedly introduce prey to a spider that is clearly preparing to moult.
Moulting
Like all spiders, Giant Huntsman Spiders grow by shedding their exoskeleton.
This process is:
ecdysis or moulting.
Moulting Site
A huntsman may prepare a secure silken area before moulting.
Do not destroy or disturb this structure.
During the Moult
The spider is extremely vulnerable while extracting itself from the old exoskeleton.
Never:
- Touch it
- Move it
- Spray it directly
- Introduce prey
during the moulting process.
Freshly Moulted Spider
Immediately after moulting, the spider’s:
- Exoskeleton is soft
- Fangs are soft
- Legs are vulnerable
It requires time to harden.
Feeding After a Moult
Do not feed immediately after moulting.
Wait until the spider has:
fully hardened and regained normal movement.
Large individuals may require several days or longer.
Exuvia
The discarded exoskeleton is called an:
exuvia.
It can be removed once the spider has moved away and hardened.
Adult Moulting
Mature male spiders generally stop moulting after reaching sexual maturity.
Females may have different longevity and developmental patterns.
Sexing
Sexual dimorphism becomes easier to recognise in mature specimens.
Mature males generally develop:
enlarged pedipalps.
Male Pedipalps
The ends of the mature male’s pedipalps become enlarged and specialised for reproduction.
They are often described as resembling:
boxing gloves.
Females
Mature females are generally:
- More robust
- Heavier bodied
- Longer lived
than mature males.
Handling
Routine handling is:
strongly discouraged.
Why Handling Is Unsuitable
The main reasons are:
- Extreme speed
- Escape risk
- Risk of falling
- Stress
- Potential defensive biting
Bite Risk
A Giant Huntsman Spider possesses venom used to subdue prey.
A defensive bite is possible if the animal is:
- Trapped
- Restrained
- Crushed
- Provoked
Medical Significance
The species should not be casually described as harmless.
At the same time, exaggerated claims about lethality should be avoided.
The sensible husbandry approach is:
do not handle the spider and prevent bites through enclosure design and careful maintenance.
If a Bite Occurs
If bitten:
- Wash the area
- Avoid repeatedly manipulating the wound
- Monitor symptoms
- Seek appropriate medical advice if symptoms are severe, unusual or worsening
People experiencing signs of a serious allergic reaction require urgent medical attention.
Moving the Spider
Use a:
catch cup and long soft tool
for transfers.
Catch Cup Method
Place a suitably sized transparent container over or in front of the spider.
Use a long soft brush or similar tool to gently encourage it into the container.
Secure the lid before moving it.
Never Use Bare Hands
Do not attempt to catch an escaped huntsman:
with your bare hands.
Maintenance Planning
Before opening the enclosure, have ready:
- Feeding tools
- Water
- Catch cup
- Long forceps
- Soft brush if required
This reduces the amount of time the enclosure remains open.
Locate the Spider First
Before performing maintenance:
find the spider.
Do not blindly reach behind cork bark or vegetation.
Long Tools
Long forceps can be useful for:
- Removing prey remains
- Replacing food insects
- Moving light furnishings
Avoid placing fingers close to the spider unnecessarily.
Individual Housing
Giant Huntsman Spiders should normally be housed:
individually.
Cannibalism
Spiders are predators and may attack one another.
Cannibalism is a serious risk, particularly:
- Outside mating
- During moulting
- When size differences exist
- In confined housing
Communal Housing
Do not assume that because multiple spiders may occur in the same general habitat they can safely share a small captive enclosure.
Individual housing is the safest recommendation.
Breeding
Breeding should only be attempted by keepers experienced with:
- Fast spiders
- Controlled introductions
- Spider reproduction
- Spiderling management
Introducing a Pair
The male should not simply be placed permanently into the female’s enclosure without observation.
Introductions require:
careful supervision and escape precautions.
Courtship
The male uses vibratory and physical signals during courtship.
A receptive female may permit mating.
An unreceptive female may:
- Retreat
- Threaten
- Attack
Cannibalism During Breeding
Cannibalism remains possible.
The male should have opportunities to:
retreat quickly.
Egg Sac
After successful mating, the female can produce a:
silken egg sac.
Maternal Care
Females may guard their egg sac closely.
Do not repeatedly disturb a female carrying or guarding eggs.
Defensive Females
A female protecting an egg sac may become considerably more defensive.
Maintenance should be:
minimal and carefully planned.
Spiderlings
An egg sac can produce numerous:
tiny spiderlings.
Keepers must prepare for this before attempting breeding.
Spiderling Escape Risk
Spiderlings can pass through openings that easily contain adults.
Juvenile housing therefore requires:
extremely fine secure ventilation.
Spiderling Housing
Spiderlings are commonly separated into:
- Small individual containers
- Secure ventilated rearing enclosures
Individual rearing reduces cannibalism.
Spiderling Feeding
Suitable food can include very small captive-bred prey such as:
- Fruit flies
- Pinhead crickets
- Other appropriately sized feeder invertebrates
Spiderling Hydration
Tiny droplets can be provided carefully.
Avoid creating deep standing water in very small spiderling containers.
Growth
Spiderlings grow through repeated moults.
As they increase in size:
- Increase prey size
- Increase enclosure size
- Maintain secure ventilation
- Provide suitable climbing surfaces
Cleaning
Routine maintenance should include:
- Removing prey remains
- Cleaning the water dish
- Removing excessive waste
- Monitoring substrate
- Checking for mould
Spot Cleaning
Regular:
spot cleaning
is preferable to constantly dismantling the entire enclosure.
Major Cleaning
If major enclosure work is necessary, temporarily secure the spider inside:
a catch container.
Do not attempt to clean around a free-running huntsman in a dismantled enclosure.
Mould
Persistent mould generally indicates:
- Excess moisture
- Poor ventilation
- Accumulated prey remains
Correct the underlying cause.
Mites
Small numbers of harmless soil organisms can occur in naturalistic setups.
Large mite populations may indicate:
- Excess food
- Excess moisture
- Poor hygiene
Never use household pesticides to treat the enclosure.
Springtails
Springtails can be useful cleanup organisms in naturalistic setups.
They help consume:
- Mould
- Organic debris
- Small food residues
Household Insecticides
Spiders are extremely vulnerable to insecticides.
Keep the enclosure away from:
- Fly sprays
- Ant treatments
- Flea sprays
- Cockroach killers
- Garden pesticides
Aerosols
Avoid spraying near the enclosure:
- Air fresheners
- Perfume
- Cleaning products
- Deodorising aerosols
Pesticides on Feeder Insects
Only use feeder insects from reliable captive sources.
Wild-caught insects can introduce:
- Pesticides
- Parasites
- Other contaminants
Health
Most captive health problems are associated with husbandry.
Potential problems include:
- Dehydration
- Excessive moisture
- Poor ventilation
- Failed moults
- Physical injury
- Pesticide exposure
- Overheating
Dehydration
Signs potentially associated with serious dehydration include:
- Weakness
- Reduced coordination
- Abnormal leg posture
Always provide clean drinking water and appropriate environmental moisture.
Death Curl
A severely compromised or dead spider may pull its legs tightly beneath the body.
This is often called a:
death curl.
However, do not disturb a spider simply because its posture looks unusual during moulting.
Falls
Large spiders can be injured by falls.
Although huntsman spiders are arboreal and comparatively agile, enclosure design should still avoid unnecessary long drops onto:
- Sharp rocks
- Hard decorations
Common Husbandry Mistakes
Common mistakes include:
- Underestimating the spider’s speed
- Using an insecure enclosure
- Opening the enclosure without locating the spider
- Attempting routine handling
- Providing no narrow retreats
- Keeping the enclosure permanently soaked
- Providing inadequate ventilation
- Allowing the enclosure to become excessively dry
- Overheating
- Leaving live prey with a moulting spider
- Feeding immediately after a moult
- Housing adults communally
- Reaching blindly behind bark
- Attempting transfers without a catch cup
- Using wild-caught feeder insects
- Using household insecticides near the enclosure
Are Giant Huntsman Spiders Suitable for Beginners?
Heteropoda maxima is best considered:
intermediate to advanced.
Its environmental requirements are not exceptionally complicated.
The difficulty comes primarily from its:
size and extraordinary speed.
A keeper should ideally already be comfortable:
- Feeding spiders
- Recognising pre-moult
- Using catch cups
- Performing hands-off maintenance
- Managing fast arboreal invertebrates
Display Value
Few spiders create the same immediate visual impact as a large huntsman.
The enormous laterigrade leg span gives the animal a dramatically different appearance from:
- Tarantulas
- Orb-weavers
- Jumping spiders
Naturalistic Display
A vertical enclosure containing:
- Cork bark
- Dark crevices
- Plants
- Leaf litter
can create an excellent display.
However, the enclosure should remain functional and allow the keeper to locate the spider safely.
Educational Value
Heteropoda maxima provides opportunities to observe:
- Laterigrade locomotion
- Active hunting
- Spider moulting
- Nocturnal behaviour
- Camouflage
- Sexual dimorphism
- Egg-sac production
- Spiderling development
Huntsman Versus Tarantula
Huntsman spiders and tarantulas are both spiders but differ considerably in body form and behaviour.
A huntsman typically has:
- A flatter body
- Laterigrade legs
- Greater running speed
- A more active hunting strategy
It should therefore not simply be maintained or handled as though it were a tarantula.
Responsible Sourcing
Captive-bred animals should be preferred whenever genuinely available.
When purchasing a specimen, ask:
- Is it definitely Heteropoda maxima?
- Is it captive bred?
- What developmental stage is it?
- What prey is it currently accepting?
- What temperature is it currently maintained at?
- When did it last moult?
Correct Identification
Numerous huntsman spiders can look superficially similar.
Do not assume every very large huntsman offered for sale is:
Heteropoda maxima**.**
Reliable identification and provenance are valuable.
Legal Considerations
Regulations concerning exotic spiders vary by jurisdiction.
Restrictions may apply to:
- Import
- Export
- Possession
- Breeding
- Sale
- Transport
Always verify current legislation before obtaining or distributing the species.
Never Release Captive Spiders
Never release:
- Adults
- Juveniles
- Spiderlings
- Egg sacs
into the environment.
Unwanted animals should be responsibly rehomed.
Responsible Ownership
Before obtaining Heteropoda maxima, ensure you can provide:
- A secure arboreal enclosure
- Adequate width for its leg span
- Good ventilation
- Appropriate humidity
- Warm temperatures
- Vertical bark retreats
- Clean drinking water
- Suitable captive-bred prey
- Individual housing
- Hands-off maintenance
- A catch cup and suitable transfer equipment
Summary
The Giant Huntsman Spider (Heteropoda maxima) is an extraordinary large huntsman spider native to Laos and particularly associated with limestone cave environments.
It is famous for its enormous leg span, which in exceptionally large specimens can approach approximately 25–30 cm, although the actual body is considerably smaller.
Its flattened body and laterigrade legs allow the spider to occupy narrow vertical crevices and move rapidly across surfaces.
Captive housing should therefore be vertically orientated while still providing enough width to accommodate the spider’s substantial leg span.
For a large adult, an enclosure around 30 × 30 × 45 cm or larger provides a useful starting point.
Large vertical cork slabs and narrow retreats should be provided.
A temperature range of approximately 24–28°C and moderate-to-high humidity provide useful general targets, but ventilation is essential. The enclosure should never remain permanently saturated or stagnant.
A clean shallow water dish should always be available.
The spider is a carnivorous active hunter and can be fed appropriately sized captive-bred crickets, locusts, cockroaches and other suitable feeder invertebrates.
Remove uneaten prey when the spider approaches a moult.
Routine handling is strongly discouraged. Heteropoda maxima is extremely fast, making escape a significant risk, and defensive biting remains possible.
Individual housing is safest because cannibalism can occur.
Breeding should be attempted only by experienced keepers prepared to manage adult introductions, egg-sac guarding and potentially large numbers of tiny fast spiderlings.
With a secure enclosure, suitable vertical retreats, careful humidity management and hands-off maintenance, Heteropoda maxima can make an extraordinary display spider.
IMPORTANT INFORMATION
This care sheet provides general husbandry guidance and does not replace current species-specific research, professional medical advice or applicable wildlife and import legislation.
Routine handling is not recommended. Heteropoda maxima is an exceptionally fast spider and may bite defensively if trapped, restrained or provoked.
Always locate the spider before opening the enclosure and have a catch cup available during maintenance.
Use a secure enclosure with appropriately sized ventilation openings. Spiderlings require considerably finer escape-proof ventilation than adults.
Provide vertical cork bark and narrow retreats while ensuring the enclosure is wide enough for the spider’s substantial leg span.
Maintain moderate-to-high humidity alongside good ventilation. Do not keep the enclosure permanently saturated.
Never leave live feeder insects with a spider that is moulting or freshly moulted.
Do not feed immediately after a moult; allow the new exoskeleton and fangs to harden.
House specimens individually unless conducting a carefully supervised breeding introduction.
If a bite occurs and symptoms are severe, unusual or worsening, seek appropriate medical advice. Signs of a serious allergic reaction require urgent medical attention.
Never use household insecticides around the enclosure.
Never release captive spiders, spiderlings or egg sacs into the environment.
Always verify current regulations concerning possession, breeding, sale, transport, import and export in your jurisdiction.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026