Brown Recluse Spider (Loxosceles reclusa) Care Sheet
The Brown Recluse Spider (Loxosceles reclusa) is a secretive, predominantly nocturnal spider native to the central and southern United States. Although certainly not a conventional pet, it is occasionally maintained by experienced enthusiasts within specialist arachnid collections.
The species belongs to the family Sicariidae, alongside other Loxosceles species and the six-eyed sand spiders. It is particularly well known because its venom can cause loxoscelism, making careful containment and completely hands-off husbandry essential.
Brown Recluses are not active pursuit predators in the same manner as jumping spiders, nor do they construct large prey-catching webs like orb-weavers. They typically occupy secluded retreats and produce irregular silk around sheltered areas.
Their environmental requirements are comparatively straightforward. However, straightforward husbandry must never be confused with suitability for beginners. The combination of small body size, ability to exploit narrow gaps, medically significant venom and excellent concealment makes enclosure security exceptionally important.
Successful husbandry requires a secure escape-resistant enclosure, numerous dark retreats, good ventilation, predominantly dry conditions with appropriate hydration, suitable temperatures, captive-bred prey, individual housing and strict hands-off maintenance.
Quick Facts
Scientific name: Loxosceles reclusa
Common name: Brown Recluse Spider
Order: Araneae
Family: Sicariidae
Origin: Central and southern United States
Lifestyle: Terrestrial/crevice-dwelling hunter
Activity: Primarily nocturnal
Diet: Carnivorous
Temperature: Approximately 20–27°C
Humidity: Low to moderate with good ventilation
Housing: Individual
Handling: Not recommended
Experience level: Advanced
Venom: Medically significant
Major requirements: Secure containment, retreats, ventilation, controlled hydration and hands-off maintenance
Natural Distribution
The Brown Recluse is native to a defined region of the:
central and southern United States.
It should not automatically be assumed that every brown spider encountered elsewhere is Loxosceles reclusa.
Identification
Brown Recluse identification is frequently misunderstood.
Colour alone is:
not sufficient for reliable identification.
Many harmless spiders are routinely misidentified as Brown Recluses.
Six Eyes
One useful characteristic of Loxosceles is the presence of:
six eyes arranged in three pairs.
Most spiders possess eight eyes.
However, eye arrangement should be considered alongside other anatomical and geographical characteristics.
Violin Marking
The species is famous for the dark marking on the cephalothorax sometimes described as:
violin shaped.
This has led to names such as:
- Fiddleback Spider
- Violin Spider
However, the marking alone is not a reliable identification method.
Appearance
Adult Brown Recluses are generally:
- Tan to brown
- Relatively plain in appearance
- Long legged
- Fine bodied
- Covered with relatively uniform colouration
They lack the dramatic appearance of many commonly kept exotic spiders.
Size
Adults are relatively small.
Body length is generally approximately:
6–12 mm
with the legs making the overall spider appear substantially larger.
Sexual Dimorphism
Males and females are relatively similar in general appearance.
Mature males can be identified by their developed:
reproductive pedipalps.
Females generally possess a fuller abdomen.
Behaviour
Brown Recluses are primarily:
secretive spiders.
They naturally seek narrow, protected locations in which they can remain concealed.
Nocturnal Activity
Activity frequently increases:
after dark.
During daylight, a captive spider may remain hidden beneath bark or within another retreat.
Recluse Behaviour
The name “recluse” accurately reflects much of the species’ behaviour.
An established individual frequently prefers:
concealment over confrontation.
However, shy behaviour does not make handling appropriate.
Defensive Bites
Bites are most likely when a spider becomes:
- Trapped
- Pressed against skin
- Restrained
- Accidentally crushed
Captive husbandry should therefore prevent situations where direct contact can occur.
Webbing
Brown Recluses produce:
irregular silk retreats and webbing.
They do not construct symmetrical orb webs.
Hunting
The species can leave its retreat to search for prey, particularly during periods of darkness.
It may also detect prey entering or approaching silk around its retreat.
Housing
A secure terrestrial enclosure is appropriate.
The enclosure should prioritise:
- Escape prevention
- Retreat availability
- Safe maintenance access
- Ventilation
Enclosure Size
For an adult, approximately:
15 × 15 × 15 cm
provides ample room when properly furnished.
A somewhat larger enclosure is also suitable.
Excessively Large Enclosures
Large elaborate enclosures are unnecessary.
Smaller well-designed housing makes it easier to:
- Locate the spider
- Monitor feeding
- Remove prey
- Inspect enclosure security
Secure Lid
The lid or door must:
fasten securely.
A loosely fitted lid is inappropriate for a medically significant spider.
Small Gaps
Brown Recluses can exploit:
surprisingly narrow gaps.
Inspect:
- Door edges
- Hinges
- Ventilation openings
- Cable ports
- Lid corners
before introducing the spider.
Ventilation
Good ventilation is essential.
Avoid maintaining the enclosure in:
stagnant, permanently damp conditions.
Cross Ventilation
Cross ventilation is useful and helps prevent excessive moisture accumulation.
All ventilation openings must remain escape proof.
Substrate
Suitable substrates include:
- Organic topsoil
- Coco fibre
- Soil/coco mixtures
- Other pesticide-free terrestrial substrates
Substrate Depth
Approximately:
2–5 cm
is sufficient.
This species does not require the deep substrate associated with fossorial tarantulas.
Retreats
Provide multiple secure hiding places.
Suitable options include:
- Cork bark
- Bark slabs
- Small pieces of wood
- Artificial crevices
- Dry leaves
Cork Bark
A piece of cork bark positioned close to the substrate can provide:
an excellent dark retreat.
The spider may add silk beneath or behind it.
Multiple Hides
Providing more than one retreat allows the spider to choose:
- Different moisture levels
- Different temperatures
- Different degrees of concealment
Heavy Decorations
Any heavy decoration must be stable.
Do not create structures that can collapse onto the spider.
Temperature
A useful general captive range is approximately:
20–27°C.
Normal indoor temperatures are often adequate.
Temperature Stability
Avoid unnecessary extremes.
The species does not require intense heat simply because parts of its natural range experience hot summers.
Excessive Heat
Temperatures approaching or exceeding:
30°C
can become dangerous in small poorly ventilated enclosures.
Heating
Dedicated heating is often unnecessary.
If supplemental heating is required, use:
gentle thermostatically controlled external heating.
Direct Sunlight
Never place the enclosure in direct sunlight.
Small containers can overheat extremely rapidly.
Humidity
Brown Recluses do not require permanently tropical conditions.
A generally:
dry to moderately humid enclosure
with appropriate access to water is suitable.
Avoid Saturation
Do not keep the entire substrate continuously:
- Wet
- Waterlogged
- Condensation covered
Good airflow is important.
Hydration
Dry husbandry should not mean:
deliberate dehydration.
Provide controlled access to water.
Water Dish
A very small shallow water dish can be provided.
Position it where it can be maintained without disturbing the spider’s primary retreat.
Light Misting
Occasional light misting of one small area may be used if necessary.
Do not saturate the enclosure.
Moisture Gradient
A useful arrangement is:
- Mostly dry substrate
- One slightly moister area
- Good ventilation
This gives the spider environmental choice.
Lighting
Specialised lighting is unnecessary.
Provide a normal:
day/night cycle.
UVB
Dedicated UVB lighting is not required.
Feeding
Brown Recluses are:
carnivorous predators.
Suitable Prey
Appropriate captive-bred prey can include:
- Small crickets
- Cockroach nymphs
- Flies
- Small mealworms
- Other appropriately sized feeder insects
Prey Size
Use prey that can be safely subdued by the spider.
Oversized prey provides no benefit.
Feeding Frequency
Healthy adults can generally be offered prey approximately:
once every 7–14 days.
Adjust according to:
- Abdomen condition
- Temperature
- Prey size
- Age
- Reproductive status
Fasting
An established adult may occasionally refuse food for considerable periods.
This is not automatically abnormal.
Overfeeding
Do not continuously add prey because the spider remains hidden.
Monitor:
body condition rather than feeding by habit.
Uneaten Prey
Remove uneaten prey using:
long forceps.
Avoid placing bare fingers inside the enclosure.
Wild-Caught Feeders
Avoid feeding wild-caught insects.
They may introduce:
- Pesticides
- Parasites
- Pathogens
- Environmental contaminants
Captive-bred feeders are preferable.
Moulting
Juvenile Brown Recluses grow through repeated:
moults.
Pre-Moult
Before moulting, a spider may:
- Refuse food
- Become less active
- Remain within its retreat
- Increase silk production
Do Not Disturb the Retreat
If the spider has withdrawn deeply into a silk retreat:
do not dismantle it simply to check the animal.
Remove Dangerous Prey
Potentially dangerous live prey should be removed when moulting is suspected.
During the Moult
Do not:
- Handle
- Prod
- Rehouse
- Introduce prey
unless intervention is absolutely necessary.
Freshly Moulted Spider
Following a moult, the spider’s new:
- Exoskeleton
- Legs
- Fangs
remain soft.
Feeding After Moulting
Wait until the spider is:
fully hardened and behaving normally
before feeding again.
Exuvia
The discarded exoskeleton is called the:
exuvia.
It can be removed when safely accessible.
Handling
Routine handling is:
not recommended.
There is no husbandry benefit to placing a Brown Recluse on bare skin.
Hands-Off Husbandry
The species should be maintained as:
a hands-off specialist display animal.
Venom
Loxosceles reclusa possesses:
medically significant venom.
Envenomation can produce a clinical syndrome known as:
loxoscelism.
Loxoscelism
Loxoscelism can broadly be divided into:
- Local effects
- Systemic effects
Not every bite produces severe illness.
Local Effects
A confirmed bite may produce:
- Pain
- Redness
- Swelling
- Local tissue injury
In some cases, more substantial skin lesions can develop.
Dermonecrosis
Brown Recluse venom has the potential to produce:
dermonecrotic lesions.
However, severe necrosis does not occur after every bite.
Systemic Loxoscelism
Less commonly, significant systemic illness can occur.
Potential complications may include:
- Fever
- Malaise
- Haemolysis
- Anaemia
- Other systemic effects
These require medical assessment.
Children
Systemic loxoscelism can be particularly concerning in:
children.
Any suspected significant exposure should receive appropriate professional medical assessment.
Misdiagnosis
One of the most important facts surrounding Brown Recluse bites is that:
many skin lesions attributed to Brown Recluses are never confirmed spider bites.
Other medical conditions can produce superficially similar lesions.
Avoid Automatic Diagnosis
A mysterious skin lesion should not automatically be described as:
“a Brown Recluse bite.”
Reliable diagnosis requires appropriate medical evaluation and, where possible, confirmation of the spider involved.
Bite Prevention
The appropriate captive strategy is:
prevent bites entirely.
Never Test Temperament
Do not deliberately:
- Touch
- Pick up
- Restrain
- Provoke
the spider to demonstrate that it is supposedly harmless or docile.
Maintenance Tools
Keep suitable equipment available, including:
- Long forceps
- Catch cup
- Soft guiding tool
- Secondary containment tub
Hands Outside the Enclosure
Design routine maintenance so that:
hands remain outside whenever practical.
Rehousing
Rehousing requires careful planning.
Prepare the new enclosure and all transfer equipment:
before opening the occupied enclosure.
Secondary Containment
For additional security, conduct transfers inside:
a larger empty secure container.
If the spider escapes either primary enclosure, it remains within the larger controlled area.
Controlled Transfer Area
Do not perform transfers:
- Over carpet
- Beside furniture
- Near open doors
- Near open windows
- In cluttered rooms
Catch Cup Transfer
Use a secure catch cup and suitable guiding tool.
Never attempt to grab the spider with bare hands.
Individual Housing
Brown Recluses should generally be maintained:
individually.
Communal Claims
Although Loxosceles spiders may sometimes occur near one another where habitat is favourable, this does not make communal captivity necessary or advisable.
Individual housing simplifies:
- Feeding
- Monitoring
- Moulting
- Containment
Sexing
Mature males develop enlarged:
reproductive pedipalps.
Females generally have a fuller abdomen.
Mature Males
Adult males may become more active as they search for females.
This makes:
secure containment particularly important.
Breeding
Breeding should be attempted only by experienced keepers prepared to manage:
numerous medically significant spiderlings.
Pairing
A mature male and female should not simply be permanently housed together.
Pairing should be:
- Controlled
- Observed
- Conducted within secure secondary containment
Cannibalism
Cannibalism is possible.
The male should have an opportunity to retreat.
Egg Sacs
Following successful mating, a female may produce:
silken egg sacs.
Female With Egg Sac
Avoid unnecessary disturbance of a female associated with eggs.
Multiple Egg Sacs
A successfully mated female may potentially produce more than one egg sac.
Keepers should therefore prepare for offspring:
before pairing occurs.
Spiderlings
Newly emerged spiderlings are extremely small.
They create a much greater containment challenge than a single adult.
Spiderling Housing
Spiderlings require:
- Secure containers
- Extremely fine ventilation
- Appropriate retreats
- Suitable tiny prey
- Controlled hydration
Spiderling Escape Risk
A juvenile can pass through openings that easily contain an adult.
Every spiderling enclosure must therefore be:
carefully escape proof.
Spiderling Feeding
Suitable prey can include:
- Flightless fruit flies
- Tiny flies
- Other appropriately sized captive-bred feeder insects
Cannibalism Among Spiderlings
As spiderlings grow, individual housing is the safest approach.
Breeding Responsibility
Do not breed Loxosceles reclusa unless there is a realistic plan for:
- Housing offspring
- Feeding offspring
- Secure containment
- Responsible distribution
Producing medically significant spiders without a placement plan is irresponsible.
Labelling
Clearly label the enclosure with:
Brown Recluse – Loxosceles reclusa – Medically Significant – Do Not Handle
or another clear equivalent.
Shared Households
Anyone with access to the enclosure should understand:
- What species is inside
- That it must not be handled
- That the enclosure must not be opened casually
Children
The enclosure must be completely inaccessible to:
children.
Other Pets
Position the enclosure somewhere:
- Cats cannot knock it over
- Dogs cannot reach it
- Other pets cannot disturb it
Secure Location
For medically significant species, a:
locked or otherwise access-controlled area
is preferable.
Escape Planning
Before obtaining the animal, decide how an escape would be handled.
Keep appropriate:
- Catch cups
- Long tools
- Secure containers
available.
Never Search Blindly
If an escape occurs, do not place bare hands blindly:
- Behind furniture
- Under objects
- Into boxes
- Into dark crevices
Use controlled methods and maintain visual awareness.
Cleaning
The enclosure generally requires minimal invasive cleaning.
Routine maintenance includes:
- Removing prey remains
- Refilling water
- Removing accessible waste
- Checking enclosure security
Preserve Retreats
Do not repeatedly destroy established silk and retreats simply to make the enclosure appear tidy.
Complete Cleaning
Full substrate replacement should be performed only when genuinely necessary.
Every unnecessary rehousing creates additional:
escape and exposure risk.
Household Insecticides
Spiders are extremely sensitive to pesticides.
Keep the enclosure away from:
- Fly spray
- Ant killer
- Flea treatments
- Cockroach treatments
- Garden insecticides
Aerosols
Avoid spraying nearby:
- Perfume
- Air freshener
- Cleaning spray
- Deodorising products
Health
Potential husbandry problems include:
- Dehydration
- Excessive moisture
- Poor ventilation
- Overheating
- Failed moults
- Physical injury
- Chemical contamination
Common Husbandry Mistakes
Common mistakes include:
- Misidentifying another brown spider as Loxosceles reclusa
- Relying solely on the violin marking for identification
- Treating the species as suitable for beginners
- Attempting routine handling
- Using an insecure enclosure
- Underestimating narrow escape gaps
- Providing no suitable retreats
- Keeping the enclosure permanently wet
- Allowing prolonged dehydration
- Leaving dangerous prey during moulting
- Feeding immediately after a moult
- Rehousing unnecessarily
- Rehousing without secondary containment
- Allowing children access
- Failing to label the enclosure
- Breeding without preparing for spiderlings
Is the Brown Recluse Suitable for Beginners?
No.
Its basic environmental requirements are comparatively straightforward.
The challenge is:
safe containment and responsible management of a medically significant spider.
Appropriate Keeper
A prospective keeper should already understand:
- Spider husbandry
- Secure enclosure design
- Moulting
- Hands-off maintenance
- Catch-cup transfers
- Escape prevention
- Medically significant arachnid protocols
The species should be considered:
advanced.
Availability in the Hobby
The Brown Recluse is not a mainstream pet spider.
However, Loxosceles species are occasionally maintained and bred within:
specialist arachnid collections.
Availability depends heavily upon country, breeder activity and local legislation.
This makes the species relevant to a comprehensive home-kept invertebrate library, provided it is clearly presented as a specialist animal rather than a conventional pet.
Similar Species in the Hobby
Other Loxosceles species may also appear in specialist collections.
Examples can include:
- Mediterranean Recluse (Loxosceles rufescens)
- Chilean Recluse (Loxosceles laeta)
- Other regional Loxosceles species
They should not automatically be given identical husbandry or risk descriptions.
Do Not Substitute Species
A spider sold simply as:
“Recluse Spider”
should be identified properly before breeding or publishing species-specific husbandry information.
Educational Value
For experienced specialist keepers, Loxosceles reclusa provides opportunities to observe:
- Nocturnal hunting
- Retreat construction
- Sicariid anatomy
- Spider moulting
- Courtship
- Egg-sac production
- Spiderling development
Its captive value lies in observation and education rather than physical interaction.
Responsible Sourcing
Captive-bred specimens should be preferred where legitimately available.
Before obtaining one, ask:
- Is it definitely Loxosceles reclusa?
- How was the identification confirmed?
- Is it captive bred?
- What developmental stage is it?
- What prey is it currently accepting?
- When did it last moult?
- Has an adult female previously been paired?
Wild-Caught Females
A mature wild-caught female may potentially have mated before entering captivity.
This means she may later produce:
fertile egg sacs.
A keeper must be prepared for this possibility.
Legal Considerations
Regulations concerning medically significant spiders vary according to jurisdiction.
Depending upon location, possession may be:
- Unrestricted
- Regulated
- Permit controlled
- Prohibited
Always check current regulations before obtaining the species.
Native Does Not Automatically Mean Collectable
Even within the natural range of Loxosceles reclusa, local wildlife, property or protected-area regulations may affect collection.
Do not assume that finding an animal locally automatically permits:
collection or commercial sale.
Dealer Availability Does Not Guarantee Legality
An animal being advertised online or at an expo does not automatically mean possession is legal where the purchaser lives.
The keeper is responsible for checking applicable regulations.
Never Release Captive Spiders
Never release captive:
- Adults
- Juveniles
- Spiderlings
- Egg sacs
into the environment.
This remains important even within regions where the species naturally occurs.
Responsible Ownership
Before obtaining Loxosceles reclusa, ensure you can provide:
- Secure escape-resistant housing
- Suitable retreats
- Appropriate ventilation
- Correct temperatures
- Controlled hydration
- Captive-bred prey
- Individual housing
- Long maintenance tools
- Secure catch containers
- Controlled transfer procedures
- Safe placement away from children and pets
- Long-term specialist care
Summary
The Brown Recluse (Loxosceles reclusa) is a secretive terrestrial spider native to the central and southern United States and occasionally maintained within specialist arachnid collections.
It is a relatively small, predominantly nocturnal species that naturally spends much of its time concealed within protected crevices.
Captive housing should provide a secure terrestrial enclosure containing multiple dark retreats, approximately 2–5 cm of suitable substrate, good ventilation and carefully controlled hydration.
For many captive situations, approximately 20–27°C provides a useful general temperature range.
The enclosure should remain predominantly dry to moderately humid rather than permanently saturated.
Adults can generally be offered appropriately sized captive-bred prey approximately every 7–14 days, adjusted according to body condition and life stage.
The greatest consideration is containment.
Loxosceles reclusa possesses medically significant venom capable of causing loxoscelism. Severe tissue injury can occur following some envenomations, while systemic illness is less common but potentially serious.
At the same time, Brown Recluse bites are frequently overdiagnosed, and unexplained skin lesions should not automatically be attributed to this species.
Routine handling is unnecessary and inappropriate.
Maintenance should use long tools, catch cups and carefully planned transfer procedures.
Breeding should be restricted to experienced keepers capable of securely managing potentially numerous tiny spiderlings.
With secure housing and responsible hands-off management, Loxosceles reclusa can be maintained as a specialist home-kept arachnid.
It is not a beginner species and should never be treated as a handling pet.
IMPORTANT INFORMATION
Loxosceles reclusa is a medically significant spider intended for experienced specialist keepers.
Correct identification is essential. Many harmless brown spiders are incorrectly labelled as Brown Recluses, and the familiar violin-shaped marking should never be used as the sole identification feature.
Routine handling is not recommended.
Keep specimens individually in secure, clearly labelled enclosures inaccessible to children, pets and unauthorised household members.
Inspect ventilation openings, doors and lids carefully because the species can exploit small gaps.
Provide multiple dark retreats and avoid unnecessary disturbance.
Maintain predominantly dry to moderately humid conditions with good ventilation and appropriate access to water.
Remove potentially dangerous feeder insects when moulting is suspected and allow freshly moulted spiders to harden before feeding.
Use long tools and secure catch-container procedures for maintenance and transfers.
Brown Recluse venom can cause medically significant loxoscelism, but severe necrosis does not follow every bite. Unexplained skin lesions should not automatically be diagnosed as spider bites.
Breeding can produce numerous tiny medically significant spiderlings and should only be attempted by keepers equipped to contain, feed and responsibly place the offspring.
Always verify current legislation concerning possession, collection, breeding, sale, transport, import and export.
Never release captive adults, juveniles, spiderlings or egg sacs into the environment.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026