Boomslang (Dispholidus typus) Care Sheet
The Boomslang (Dispholidus typus) is a highly arboreal, dangerously venomous snake native to sub-Saharan Africa. Although it belongs to the family Colubridae rather than the elapid or viper families that contain many better-known venomous snakes, its venom is medically extremely significant and potentially fatal.
Boomslangs possess enlarged rear-positioned venom-delivery teeth and should never be regarded as a mildly venomous or routine colubrid simply because they are rear-fanged. They require the same serious approach to containment, emergency planning and specialist competence expected for other dangerously venomous reptiles.
The species is slender, exceptionally agile and strongly adapted to life above ground. Captive husbandry must therefore prioritise vertical and horizontal climbing space, dense branching, visual cover and secure elevated resting positions rather than treating the animal as a terrestrial snake in a tall but sparsely furnished enclosure.
Boomslangs are visually oriented predators with excellent eyesight. Their large eyes and active scanning behaviour are characteristic features of the species.
There is considerable geographical and sexual variation in colouration. Adult males may be vivid green, olive, brown, black or combinations of these colours depending upon locality, while females are commonly brown or olive. Juveniles often differ markedly from adults.
This species is suitable only for appropriately experienced specialist venomous-reptile keepers with secure facilities, emergency procedures and all legally required permissions.
This care sheet provides comprehensive husbandry guidance. It is not a venomous-snake handling or restraint manual.
Captive-bred animals of documented provenance should be strongly preferred.
Quick Facts
Scientific name: Dispholidus typus
Common name: Boomslang
Family: Colubridae
Native range: Much of sub-Saharan Africa
Natural habitat: Woodland, savannah, scrub, forest margins, bushland and other habitats containing trees or substantial vegetation
Lifestyle: Strongly arboreal
Activity: Primarily diurnal
Adult size: Commonly approximately 4–5 ft (1.2–1.5 m), with larger individuals approaching or exceeding 6 ft (1.8 m)
Build: Very slender, lightweight and highly agile
Lifespan: Approximately 10–15+ years may be achievable under excellent captive conditions
Experience level: Specialist venomous keepers only
Venomous: Yes — medically significant and potentially fatal
Dentition: Rear-fanged/opisthoglyphous
Adult enclosure: Approximately 4 × 2 × 4 ft (120 × 60 × 120 cm) should be regarded as a practical starting point, with larger accommodation strongly beneficial
Basking area: Approximately 29–31°C (84–88°F)
Warm ambient: Approximately 25–27°C (77–81°F)
Cooler area: Approximately 22–24°C (72–75°F)
Night: Approximately 20–23°C (68–73°F)
Humidity: Generally approximately 50–70%, with good ventilation and normal fluctuations
Water: Fresh drinking water continuously available; elevated drinking opportunities may be useful
Lighting: Approximately 11–13 hours
UVB: Low-to-moderate UVB appropriate as part of comprehensive modern husbandry
Target UVI: Approximately 1.0–2.0 at an accessible basking perch, with extensive shade and complete UV retreat
Diet: Appropriately sized whole vertebrate prey
Housing: Individual housing recommended
Reproduction: Oviparous — egg-laying
Hatchlings: Venomous from hatching
Quarantine: Approximately 90 days minimum is a sensible starting point
Important Venomous Species Warning
The Boomslang is a dangerously venomous snake.
Its rear-fanged dentition must never be interpreted as indicating insignificant venom.
Any suspected bite requires:
IMMEDIATE EMERGENCY MEDICAL ASSESSMENT.
Before acquisition, the keeper should already have:
- Appropriate specialist venomous-reptile experience
- Secure purpose-built accommodation
- Secure secondary containment
- Effective escape prevention
- Written emergency procedures
- Appropriate veterinary arrangements
- Knowledge of suitable emergency medical facilities
- An accidental-escape plan
- A plan should the primary keeper become incapacitated
- Appropriate legal permissions where required
- A responsible backup person who knows what species are present and how to summon appropriate assistance
These arrangements should exist before the animal enters the facility.
Understanding Rear-Fanged Venomous Snakes
Boomslangs are sometimes incorrectly described as less dangerous because their enlarged venom-delivery teeth are positioned toward the rear of the upper jaw.
This is dangerously misleading.
Rear-fanged describes the anatomical arrangement of the dentition. It does not provide a reliable measure of medical significance.
The Boomslang is capable of causing severe systemic envenomation.
For husbandry purposes it should be treated as:
A DANGEROUSLY VENOMOUS SNAKE.
Venom
Boomslang venom is particularly associated with severe disruption of normal blood coagulation.
Clinical effects following significant envenomation can be delayed rather than immediately dramatic.
This makes one principle particularly important:
THE ABSENCE OF IMMEDIATE SEVERE SYMPTOMS DOES NOT MAKE A SUSPECTED BITE SAFE.
Any suspected bite requires immediate professional medical assessment.
This care sheet deliberately does not provide home-treatment or first-aid procedures beyond directing the affected person to emergency medical care.
Species Overview
Boomslangs are highly specialised arboreal snakes.
They occur across a large portion of sub-Saharan Africa and inhabit environments including:
- Savannah
- Woodland
- Bushland
- Scrub
- Forest margins
- Riverine vegetation
- Agricultural margins
- Vegetated suburban areas within their natural range
They spend considerable time:
- Among branches
- Within shrubs
- Moving through vegetation
- Basking from elevated positions
- Searching visually for prey
Their captive environment should therefore provide three-dimensional usable space rather than merely an empty tall enclosure.
Adult Size
Adults commonly reach approximately:
4–5 ft (1.2–1.5 m).
Large individuals may approach or exceed:
6 ft (1.8 m).
The species is extremely slender relative to its length.
Its light build should not be used to justify inadequate accommodation.
A Boomslang should be able to move naturally through a network of branches rather than spending most of its life wrapped around one perch.
Lifespan
Approximately:
10–15+ YEARS
may be achievable under excellent captive conditions.
Long-term data for many specialist venomous species are less extensive than for common pet snakes, so maximum lifespan should not be regarded as a fixed figure.
Sexual Dimorphism & Colour
Boomslangs are notable for considerable sexual and geographical colour variation.
Adult males may be:
- Bright green
- Olive
- Brown
- Black
- Green with darker edging
- Various intermediate colours
Adult females are frequently:
- Brown
- Olive-brown
- Grey-brown
Juveniles may display:
- Grey or brown bodies
- Contrasting markings
- Very large-looking eyes
- Different colouration from mature animals
Colour should not be used alone to establish sex or geographical provenance.
Enclosure
Boomslangs require genuinely arboreal accommodation.
For one adult, approximately:
4 × 2 × 4 ft
(approximately 120 × 60 × 120 cm)
should be regarded as a practical starting point.
For large adults, accommodation around:
5–6 ft long × 2–3 ft deep × 4–5 ft high
(approximately 150–180 × 60–90 × 120–150 cm)
provides substantially greater behavioural opportunity.
Where safe specialist management permits:
LARGER IS BETTER.
Why Length Matters Too
An arboreal enclosure should not simply be tall.
Boomslangs move:
- Horizontally along branches
- Diagonally through vegetation
- Vertically between levels
A narrow vertical enclosure with one branch does not provide adequate usable space.
Think in terms of:
THREE-DIMENSIONAL MOVEMENT.
Branch Network
Branches are a fundamental part of the enclosure.
Provide:
- Horizontal branches
- Diagonal branches
- Branches at different heights
- Different diameters
- Covered resting branches
- Exposed basking branches
The snake should have multiple routes through the enclosure.
Branch Diameter
Include branches that allow comfortable support without forcing the snake to grip extremely narrow perches continuously.
A mixture of:
- Thin branches
- Medium branches
- Broad resting supports
provides useful variation.
Branch Security
Every major branch must be securely fixed.
Loose branches can:
- Fall
- Trap the snake
- Damage equipment
- Compromise enclosure security
- Cause injury
Check branch stability routinely.
Elevated Hides & Cover
Boomslangs should have secure cover above ground level.
Useful options include:
- Cork tubes
- Dense artificial foliage
- Live plants
- Branch junctions
- Elevated visual barriers
- Sheltered platforms
Do not provide only a hide on the enclosure floor and expect an arboreal animal to use it normally.
Ground Area
Although strongly arboreal, Boomslangs may descend to the ground.
The enclosure floor should therefore still provide:
- Appropriate substrate
- Cover
- Safe access to water
- Additional retreat opportunities
Security
Boomslangs are exceptionally slender and agile.
This creates particular containment challenges.
The enclosure must be:
- Robust
- Escape-resistant
- Lockable
- Resistant to accidental opening
- Appropriately identified
- Located within a secure dedicated room or facility
Pay particular attention to:
- Narrow door gaps
- Sliding tracks
- Ventilation openings
- Cable ports
- Lighting penetrations
- Branches near doors
- Service openings
A gap that appears insignificant for a heavier-bodied snake may be relevant for a slender Boomslang.
Door Design
Branches should not provide an easy route directly through an opening door.
Enclosure layout should reduce the likelihood of the snake routinely resting:
- Against doors
- Around door tracks
- Immediately beside service openings
The aim is to make routine husbandry safer through enclosure design rather than relying on animal behaviour.
Secondary Containment
The primary enclosure should exist inside:
A SECURE SECONDARY ROOM OR FACILITY.
The enclosure itself should not be the only physical barrier between a Boomslang and an uncontrolled area.
The surrounding room should:
- Prevent unauthorised access
- Reduce escape routes
- Permit controlled visual assessment
- Form part of the emergency containment plan
Routine Husbandry Design
Routine husbandry should be possible while minimising unnecessary close exposure.
Tasks include:
- Water servicing
- Spot cleaning
- Substrate maintenance
- Equipment checks
- Visual health assessment
Specialist enclosure designs incorporating secure separation or retreat areas can improve routine management.
The principle is:
DESIGN OUT UNNECESSARY EXPOSURE.
Juvenile Enclosures
Juveniles require appropriately scaled arboreal accommodation.
Provide:
- Fine but secure branch networks
- Dense foliage
- Multiple elevated retreats
- Appropriate thermal gradient
- Fresh water
- Good ventilation
Juvenile containment requires exceptional attention because the animals are:
- Slender
- Agile
- Capable climbers
Hatchlings are:
VENOMOUS FROM HATCHING.
Temperature & Heating
Boomslangs require warm daytime conditions with a genuine thermal gradient.
Basking Area
Approximately:
29–31°C (84–88°F)
at an accessible basking perch.
Warm Ambient
Approximately:
25–27°C (77–81°F).
Cooler Area
Approximately:
22–24°C (72–75°F).
Night
Approximately:
20–23°C (68–73°F).
A modest night-time reduction is appropriate.
Thermal Gradient
An arboreal enclosure should provide both:
HORIZONTAL
and:
VERTICAL
thermal gradients.
The snake should be able to move:
WARM BASKING PERCH → MODERATE PERCH → COOL SHADED PERCH → RETREAT.
Avoid Heating the Entire Top
A common mistake with tall enclosures is creating an excessively hot upper zone.
The animal must have shaded elevated resting areas that are cooler than the basking perch.
Do not force it to descend to the floor simply to escape excessive heat.
Heating Equipment
Suitable options can include:
- Secure overhead radiant heating
- Appropriately protected basking lamps
- Radiant heat panels
- Controlled room heating
All heating equipment must be:
- Securely installed
- Appropriately controlled
- Protected from animal contact
- Independently monitored
Because Boomslangs climb extremely well, assume that any exposed equipment inside the enclosure can potentially be reached.
Temperature Monitoring
Measure temperatures at:
- Basking perch
- Upper shaded perch
- Mid-level branches
- Lower enclosure
- Cool retreat
- Night-time minimum
An infrared thermometer is useful for surface measurements.
Remember:
THERMOSTAT SETTING ≠ ACTUAL PERCH TEMPERATURE.
Humidity
A broad general range of approximately:
50–70% RELATIVE HUMIDITY
is suitable for many Boomslangs.
Requirements vary with:
- Locality
- Season
- Habitat
- Ventilation
- Temperature
Avoid attempting to maintain one exact humidity number continuously.
Humidity Cycling
Naturalistic fluctuations are appropriate.
Humidity may:
- Rise after misting
- Increase overnight
- Fall as the enclosure warms
- Vary between dense foliage and open basking areas
The enclosure should not remain permanently saturated.
Ventilation
Good ventilation is essential.
The objective is:
MODERATE HUMIDITY + FRESH AIR + NORMAL DRYING.
Warm stagnant air and permanently wet surfaces should be avoided.
Misting
Light misting may be useful for:
- Temporary humidity increases
- Providing droplets on foliage
- Supporting live plants
- Assisting shedding
Allow surfaces to dry partially afterwards.
Water & Hydration
Fresh drinking water should remain continuously available.
A stable ground-level water bowl should be provided.
Because Boomslangs are arboreal, some individuals may also readily investigate water droplets on foliage or elevated drinking opportunities.
These can supplement but should not replace:
PERMANENT ACCESS TO CLEAN DRINKING WATER.
Substrate
Suitable substrate options include:
- Tropical soil mixtures
- Coco/soil blends
- Cypress-type mulch
- Orchid bark
- Leaf litter
- Appropriate combinations
The substrate should:
- Retain moderate moisture
- Drain effectively
- Avoid excessive dust
- Remain hygienic
Substrate Depth
Approximately:
2–4 in (5–10 cm)
is suitable for many naturalistic enclosures.
Furnishings
Useful furnishings include:
- Secure branches
- Cork
- Vines
- Root structures
- Live plants
- Artificial foliage
- Leaf litter
- Elevated retreats
The objective is a structurally complex environment that remains manageable and secure.
Live Plants
Suitable live plants can provide:
- Visual cover
- Humidity buffering
- Naturalistic structure
- Additional shaded areas
Plants must be:
- Non-toxic
- Securely rooted
- Robust enough for the enclosure
Planting should never compromise the keeper’s ability to determine the animal’s location.
Lighting
Boomslangs are primarily diurnal and visually oriented.
Good-quality visible lighting is therefore particularly relevant.
Provide approximately:
11–13 HOURS OF DAYLIGHT
through much of the year.
A bright daylight LED can provide:
- Strong circadian cues
- Naturalistic daytime illumination
- Plant support
- Clear light/shade gradients
The enclosure should become genuinely dark at night.
Avoid visible:
- Red
- Blue
- Purple
night lamps.
UVB
As a diurnal arboreal snake, the Boomslang may experience meaningful natural ultraviolet exposure while:
- Basking
- Moving through branches
- Resting at vegetation edges
- Crossing exposed canopy gaps
Modern captive husbandry should therefore provide controlled low-to-moderate UVB alongside abundant shade.
Target UVI
A practical accessible target is approximately:
UVI 1.0–2.0
at an illuminated basking perch.
Elsewhere provide:
LOWER UV → FILTERED LIGHT → DENSE SHADE → COMPLETE UV RETREAT.
Practical UVB Equipment Guidance
A:
LOW-TO-MODERATE OUTPUT LINEAR UVB SYSTEM
can be suitable.
However, arboreal enclosure design makes lamp placement especially important.
The exact lamp required depends upon:
- Lamp model
- Reflector
- Distance
- Mesh
- Enclosure height
- Branch position
The target is approximately:
UVI 1.0–2.0 AT THE ACCESSIBLE BASKING PERCH.
Do not select UVB equipment solely according to the percentage printed on the lamp.
Arboreal UVB Safety
This is particularly important for Boomslangs.
A branch placed close to the UVB lamp can expose the animal to much more ultraviolet radiation than measurements taken on the enclosure floor suggest.
Measure at:
- Highest accessible branch
- Basking branch
- Mid-level branches
- Shaded branches
Do not assume floor-level readings represent the animal’s actual exposure.
Understanding UVB Distance
Remember:
CLOSER = GENERALLY MORE UV
FARTHER AWAY = GENERALLY LESS UV
MESH = USUALLY LESS UV
For an arboreal snake, branch placement is effectively part of the UVB system.
UV Gradient
A useful arrangement is:
BASKING PERCH: Approximately UVI 1.0–2.0
↓
OPEN BRANCHES: Lower UV exposure
↓
PARTIAL FOLIAGE: Approximately UVI 0.5–1.0 or lower
↓
DENSE FOLIAGE/RETREAT: Approaching UVI 0
What This Means in Practice
Do not simply place a powerful UVB lamp over the entire top of a tall enclosure.
Instead, create:
ONE CONTROLLED UVB BASKING AREA
alongside:
MULTIPLE SHADED ARBOREAL ROUTES.
The snake should be able to move through the upper enclosure without being continuously exposed to UVB.
UV Meter
A suitable UV Index meter is particularly valuable for arboreal species.
Measure:
AT EVERY IMPORTANT PERCH HEIGHT.
If You Do Not Have a UV Meter
Use:
- A reputable low-to-moderate-output linear UVB system
- Manufacturer’s current distance guidance
- Correct reflector
- Mesh guidance
- Conservative branch placement
- Extensive foliage and shade
Do not compensate for uncertainty by using an unnecessarily powerful lamp.
Heat, UVB & Visible Light
These provide separate environmental functions:
HEATING SYSTEM = TEMPERATURE
UVB SYSTEM = ULTRAVIOLET
DAYLIGHT LED = VISIBLE LIGHT
One does not automatically replace another.
Feeding
Boomslangs are visually oriented predators.
Natural prey can include:
- Birds
- Bird nestlings
- Eggs
- Chameleons
- Lizards
- Frogs
- Small mammals
- Other suitable vertebrates
Captive-bred individuals may accept appropriately sized whole rodents.
Diet should be based on nutritionally complete whole prey.
Dietary Variety
Where practical and legally sourced, some dietary variety may be beneficial.
Suitable whole-prey options can potentially include appropriately sized:
- Rodents
- Quail
- Other captive-produced vertebrate prey
The exact diet should reflect:
- Individual acceptance
- Age
- Body condition
- Veterinary advice where appropriate
Wild-caught prey should not be used because of:
- Parasite risk
- Disease risk
- Contaminant exposure
- Legal concerns
Frozen-Thawed Prey
Where accepted:
APPROPRIATELY PREPARED FROZEN-THAWED PREY
is preferable to routine live vertebrate feeding.
Live prey can cause injury.
Whole-Prey Nutrition
Whole prey provides:
- Muscle
- Bone
- Organs
- Fat
- Micronutrients
Pieces of meat are not an appropriate complete diet.
Prey Size
Boomslangs are slender snakes.
Avoid disproportionately large prey.
Use moderate prey appropriate to:
- Age
- Girth
- Body condition
- Individual feeding response
Feeding Frequency
Hatchlings & Small Juveniles
Approximately:
every 5–7 days
depending upon prey size and growth.
Larger Juveniles
Approximately:
every 7–10 days.
Subadults
Approximately:
every 7–14 days
depending upon prey size and body condition.
Adults
Many adults can be maintained on appropriately sized meals approximately:
every 10–14 days
with adjustment according to:
- Prey size
- Activity
- Sex
- Season
- Reproductive condition
- Body condition
Body Condition
Boomslangs are naturally slender.
A healthy individual should appear:
LEAN + MUSCULAR + LIGHTLY BUILT
rather than heavy or cylindrical.
Do not attempt to make the snake resemble a heavier-bodied species through excessive feeding.
Obesity
Overfeeding can produce an unnaturally heavy body condition.
Monitor:
- Weight trends
- Body contour
- Muscle tone
- Activity
- Feeding history
Avoid power-feeding juveniles.
Feeding Safety
Food should never be presented directly by hand.
Routine feeding arrangements should minimise unnecessary close exposure.
This care sheet deliberately does not provide procedural venomous-snake manipulation instructions.
Behaviour & Temperament
Boomslangs are generally alert, visually responsive snakes.
Normal captive behaviour can include:
- Active visual scanning
- Slow movement along branches
- Basking
- Moving between foliage
- Investigating environmental changes
- Remaining motionless among vegetation
- Descending occasionally to the floor
Eyesight
The species possesses notably large eyes and well-developed vision.
Visual environmental complexity is therefore valuable.
The animal should have opportunities to choose between:
- Open observation positions
- Partial cover
- Dense concealment
Defensive Behaviour
When threatened, a Boomslang may:
- Attempt to retreat
- Inflate the anterior body or neck
- Adopt defensive postures
- Strike
Individual responses vary.
A snake that usually retreats must never be assumed to be safe.
Handling
Boomslangs should not be casually handled.
This care sheet deliberately does not provide instructions for:
- Free-handling
- Manual restraint
- Physical manipulation
Practical venomous-reptile competence requires specialist training and experience.
Cohabitation
Individual housing is recommended.
This allows accurate monitoring of:
- Feeding
- Weight
- Faeces
- Shedding
- Health
- Behaviour
and simplifies routine husbandry.
Controlled reproductive introductions are different from permanent cohabitation.
Cleaning & Routine Care
Regularly monitor:
- Drinking water
- Faeces
- Urates
- Shed skin
- Substrate
- Humidity
- Ventilation
- Temperatures
- Lighting
- Branch stability
- Plant condition
- Locks
- Parasites
- General behaviour
Spot-clean contamination promptly.
Bioactive Enclosures
Boomslangs are well suited behaviourally to naturalistic planted environments, provided security remains uncompromised.
Potential components include:
- Live plants
- Naturalistic soil
- Leaf litter
- Appropriate cleanup organisms
However:
BIOACTIVE DOES NOT MEAN MAINTENANCE-FREE.
Continue monitoring:
- Waste
- Drainage
- Mould
- Pest species
- Plant health
- Substrate condition
Dense planting must not make it impossible to establish the snake’s location.
Quarantine
All newly acquired Boomslangs should undergo strict quarantine.
Approximately:
90 DAYS MINIMUM
is a sensible starting point.
Longer may be appropriate for:
- Imported animals
- Animals of uncertain provenance
- Animals showing clinical abnormalities
- Animals with suspected parasite exposure
Quarantine Setup
A quarantine enclosure should remain secure while allowing effective observation.
Provide:
- Simple substrate initially
- Secure branches
- Elevated cover
- Fresh water
- Appropriate heating
- Appropriate lighting
- Dedicated husbandry equipment
Quarantine Monitoring
Record:
- Body weight
- Feeding
- Defecation
- Urates
- Drinking
- Shedding
- Respiration
- Skin condition
- Mouth condition
- General behaviour
Veterinary examination and parasite screening should be considered where appropriate.
Common Health Concerns
Respiratory Disease
Possible signs include:
- Wheezing
- Clicking
- Nasal discharge
- Excess oral mucus
- Persistent abnormal open-mouth breathing
Potential contributing factors include:
- Incorrect temperatures
- Poor ventilation
- Persistently wet conditions
Dehydration
Possible signs include:
- Poor shedding
- Reduced skin condition
- Abnormal urates
- Loss of body condition
Ensure permanent access to fresh drinking water.
Stomatitis
Possible signs include:
- Oral swelling
- Discharge
- Damaged oral tissue
- Abnormal mouth position
- Reduced feeding
Veterinary assessment is required.
Skin Disease
Persistently wet or contaminated conditions may contribute to:
- Dermatitis
- Scale inflammation
- Bacterial infection
- Fungal disease
Parasites
Possible signs include:
- Visible mites
- Weight loss
- Poor body condition
- Abnormal faeces
- Reduced appetite
Imported specimens require particularly careful quarantine.
Dysecdysis
Poor shedding may occur with:
- Dehydration
- Inappropriate humidity
- Parasites
- Underlying disease
Obesity
The naturally slender body form should be maintained.
Burns
Arboreal snakes may reach heating equipment that appears inaccessible from floor level.
All heating equipment must be appropriately protected.
Falls & Furnishing Injuries
Unstable branches can cause:
- Falls
- Crushing injury
- Abrasions
- Entrapment
Check all structures routinely.
Regurgitation
Possible causes include:
- Excessive prey size
- Incorrect temperatures
- Disturbance
- Underlying disease
Repeated regurgitation requires veterinary investigation.
Signs of Good Health
A healthy Boomslang should generally display:
- Clear eyes outside shedding
- Clean nostrils
- Quiet respiration
- Intact scales
- Lean muscular body condition
- Appropriate weight
- Normal tongue-flicking
- Confident arboreal locomotion
- Strong grip and coordination
- Appropriate daytime activity
- Normal feeding response
- Normal faeces
- Complete healthy sheds
When to Seek Veterinary Advice
Seek appropriately experienced reptile veterinary care for:
- Respiratory symptoms
- Oral or nasal discharge
- Significant unexplained weight loss
- Persistent abnormal food refusal
- Repeated regurgitation
- Skin lesions
- Burns
- Abnormal swelling
- Persistent abnormal faeces
- Significant injury
- Reproductive problems
- Loss of coordination
- Major unexplained behavioural changes
Veterinary Planning
Suitable veterinary support should be identified before acquisition.
Not every reptile veterinarian is prepared or equipped to work with dangerously venomous snakes.
The veterinary practice should know:
- Exact species
- Venomous status
- Approximate size
- Reason for presentation
before transport occurs.
Never unexpectedly arrive at a veterinary practice carrying a Boomslang.
Emergency Planning
A written emergency plan should exist before the animal enters the facility.
It should include:
- Exact species present
- Relevant emergency medical arrangements
- Appropriate emergency contacts
- A plan should the primary keeper become incapacitated
- Details of suitably competent backup assistance
Responsible people associated with the premises should know that venomous reptiles are present and know how to summon appropriate assistance without entering the secure reptile area.
Because clinically important effects of Boomslang envenomation may be delayed:
DO NOT WAIT FOR SEVERE SYMPTOMS BEFORE SEEKING MEDICAL CARE.
Any suspected bite requires:
IMMEDIATE EMERGENCY MEDICAL ASSESSMENT.
Escape Planning
A written escape plan should exist.
An escaped Boomslang may seek:
- Curtain rails
- Shelving
- Plants
- Pipes
- Cables
- Window areas
- Door frames
- Roof structures
- Furniture
- Other elevated locations
This is particularly important because the species is:
SLENDER + ARBOREAL + HIGHLY AGILE.
An escape search cannot be restricted to floor level.
People without appropriate specialist competence should not attempt recovery.
Prevention through secure containment remains the priority.
Breeding
Boomslangs are:
OVIPAROUS — EGG-LAYING.
Breeding should only be attempted by appropriately experienced venomous-reptile keepers with:
- Mature healthy adults
- Secure facilities
- Appropriate emergency arrangements
- Separate accommodation for offspring
- Legal compliance
- Documented provenance
- A realistic long-term plan for every hatchling
Reproductive Preparation
Breeding animals should be:
- Mature
- Healthy
- Properly conditioned
- Free from significant disease
- Established feeders
Females should possess adequate body reserves without becoming overweight.
Seasonal Breeding Cues
Reproduction may be influenced by:
- Temperature
- Photoperiod
- Seasonal rainfall
- Feeding
- Geographical origin
Known locality should be considered wherever possible.
Courtship
Breeding activity can involve:
- Increased movement
- Following behaviour
- Close interaction
Any introduction of two venomous snakes increases management complexity.
Controlled reproductive introductions should occur only within appropriately designed specialist facilities.
Egg-Laying
A gravid female should have access to a secure nesting area.
Suitable nesting material should:
- Retain moisture
- Remain aerated
- Avoid becoming saturated
- Provide privacy
The laying site should be available before active nest-searching behaviour begins.
Clutch Size
Approximately:
8–20 EGGS
may occur, although individual clutches can vary.
Female:
- Size
- Age
- Condition
- Genetics
- Reproductive history
can all influence clutch size.
Breeders should prepare for more hatchlings than expected.
Egg Incubation
A practical incubation range is approximately:
26–28°C (79–82°F).
Maintain:
- Stable temperature
- High but controlled humidity
- Appropriate gas exchange
- Moist but not saturated incubation medium
Avoid overheating.
Incubation may commonly extend for approximately:
60–90 DAYS
depending upon temperature and development.
Hatchlings
Hatchlings are:
VENOMOUS FROM HATCHING.
Each requires:
- Secure individual accommodation
- Fine arboreal branch structure
- Appropriate thermal gradient
- Suitable humidity
- Fresh water
- Visual cover
- Appropriately sized prey
- Absolute escape prevention
Their extremely small, slender body form makes containment especially demanding.
Hatchling Feeding
Young Boomslangs naturally consume prey such as:
- Small lizards
- Frogs
- Other small vertebrates
Captive-bred juveniles may vary in prey acceptance.
The objective should be:
RELIABLE FEEDING + STEADY GROWTH + HEALTHY BODY CONDITION
rather than rapid growth.
Avoid power-feeding.
Legal Considerations — Republic of Ireland
The Republic of Ireland is not governed by the UK’s Dangerous Wild Animals Act.
A British Dangerous Wild Animals licence should therefore not be presented as a Republic of Ireland requirement for keeping a Boomslang.
Anyone acquiring, keeping, breeding, transporting, importing, exporting or transferring a dangerously venomous reptile in the Republic of Ireland should nevertheless verify all legislation and requirements applicable at the time.
Relevant considerations can include:
- Animal health and welfare legislation
- Import and export requirements
- Wildlife-trade restrictions
- Transport requirements
- Public-safety responsibilities
- Property, tenancy and insurance restrictions
- Legal provenance
Always verify the current Republic of Ireland position before acquisition or movement.
Legal Considerations — Northern Ireland
Northern Ireland has its own dangerous wild animal licensing arrangements.
Anyone proposing to keep a Boomslang should verify current requirements with the appropriate Northern Ireland authority and obtain any necessary licence before acquisition.
Legal Considerations — Great Britain
In England, Scotland and Wales, the Dangerous Wild Animals licensing framework includes specified dangerously venomous snakes beyond the elapids and vipers.
The Boomslang should therefore not be assumed exempt merely because it belongs to the family Colubridae.
Anyone intending to keep the species should verify the current Dangerous Wild Animals requirements with the relevant local authority and obtain any required licence before acquisition.
Important Jurisdiction Distinction
For readers in Ireland and the UK:
REPUBLIC OF IRELAND ≠ NORTHERN IRELAND ≠ GREAT BRITAIN
Their legal frameworks are not interchangeable.
The Dangerous Wild Animals legislation applicable in Great Britain does not apply in the Republic of Ireland.
Northern Ireland operates its own dangerous wild animal licensing arrangements.
Compliance in one jurisdiction does not automatically establish compliance in another.
Responsible Ownership Checklist
Before acquiring a Boomslang, ensure you can provide:
- Appropriate specialist venomous-reptile experience
- Secure dedicated reptile facility
- Lockable escape-resistant enclosure
- Secondary containment
- At least approximately 4 × 2 × 4 ft adult accommodation
- Larger accommodation for large adults
- Genuine three-dimensional usable space
- Extensive secure branch network
- Elevated retreats
- Dense visual cover
- Localised basking area
- Cooler elevated resting areas
- Appropriate moderate humidity
- Good ventilation
- Fresh drinking water
- Bright visible daytime lighting
- Appropriate low-to-moderate UVB
- Complete UV shade
- Appropriate whole-prey diet
- Healthy lean body condition
- Strict quarantine
- Documented provenance
- Specialist veterinary arrangements
- Written medical emergency plan
- Written escape plan
- Responsible backup arrangements
- Secure transport arrangements
- Correct legal permissions
- Long-term specialist care
Common Husbandry Mistakes
Treating rear-fanged as mildly venomous
Boomslang venom is medically extremely significant.
Providing a terrestrial enclosure
This is a strongly arboreal species.
Providing height but insufficient enclosure length
Boomslangs move horizontally and diagonally as well as vertically.
Using only one or two branches
Provide a genuine three-dimensional branch network.
Providing only a ground-level hide
Secure elevated cover is essential.
Heating the entire upper enclosure
Provide cooler shaded elevated resting areas.
Using unguarded heating equipment
Boomslangs can reach elevated equipment.
Keeping humidity constantly high
Provide moderate humidity, good ventilation and normal drying cycles.
Keeping the enclosure excessively dry
Provide appropriate hydration and humidity.
No permanent drinking water
Fresh water should remain continuously available.
Using excessive UVB
Provide controlled low-to-moderate exposure.
Measuring UVB only at floor level
For an arboreal species, this can be dangerously misleading.
Placing branches too close to UVB lamps
Check UVI at every major accessible perch.
Providing insufficient visible light
This is a diurnal, visually oriented species.
Using unstable branches
All climbing structures must be securely fixed.
Overfeeding
Boomslangs are naturally slender.
Power-feeding juveniles
Steady growth is preferable.
Assuming a normally retiring individual is safe
Behaviour is not a safety system.
Underestimating escape ability
Boomslangs are exceptionally slender and agile climbers.
Casual handling
This is a dangerously venomous species.
No secondary containment
The primary enclosure should exist within a secure surrounding facility.
Waiting for symptoms after a suspected bite
Clinically important effects may be delayed. Seek immediate emergency medical assessment.
No veterinary plan
Identify suitable veterinary support before acquisition.
Breeding without accommodation for offspring
Every hatchling is venomous.
Assuming British DWA legislation applies in the Republic of Ireland
It does not.
Husbandry Summary
Adult size: Commonly approximately 4–5 ft (1.2–1.5 m), with larger individuals approaching or exceeding 6 ft (1.8 m)
Adult enclosure: Approximately 4 × 2 × 4 ft (120 × 60 × 120 cm) minimum practical starting point, with larger accommodation strongly beneficial
Lifestyle: Strongly arboreal
Activity: Primarily diurnal
Basking area: Approximately 29–31°C (84–88°F)
Warm ambient: Approximately 25–27°C (77–81°F)
Cooler area: Approximately 22–24°C (72–75°F)
Night: Approximately 20–23°C (68–73°F)
Humidity: Approximately 50–70% with normal fluctuations
Ventilation: Good airflow essential
Water: Fresh drinking water continuously available
Substrate: Moisture-retentive but well-drained naturalistic substrate
Furnishings: Extensive secure branch network, foliage, elevated retreats and visual cover
Lighting: Approximately 11–13 hours
UVB: Low-to-moderate linear UVB
Target UVI: Approximately 1.0–2.0 at an accessible basking perch, with extensive shade and complete UV retreat
Diet: Appropriately sized whole vertebrate prey
Adult feeding: Approximately every 10–14 days as a starting point, adjusted according to prey type, activity and body condition
Body condition: Naturally lean and slender
Housing: Individual housing recommended
Handling: Specialist venomous-reptile management only
Reproduction: Egg-laying
Clutch: Approximately 8–20 eggs may occur
Incubation: Approximately 26–28°C (79–82°F)
Incubation duration: Approximately 60–90 days
Hatchlings: Venomous from hatching
Lifespan: Approximately 10–15+ years may be achievable
Quarantine: Approximately 90 days minimum as a sensible starting point
Experience: Specialist/expert
Captive-bred: Strongly preferred
Practical UVB Summary
For the Boomslang, comprehensive modern husbandry should provide:
LOW-TO-MODERATE UVB + BRIGHT DAYLIGHT + ARBOREAL SHADE + COMPLETE UV RETREAT
A suitable linear UVB system may provide approximately:
UVI 1.0–2.0
at the accessible basking perch.
The exact equipment required depends upon:
- Lamp model
- Reflector
- Distance
- Mesh
- Enclosure construction
- Branch height
Remember:
CLOSER = GENERALLY MORE UV
FARTHER AWAY = GENERALLY LESS UV
MESH = USUALLY LESS UV
and:
HEAT = TEMPERATURE
UVB = ULTRAVIOLET
DAYLIGHT LED = VISIBLE LIGHT
These perform separate functions.
For this arboreal species, measuring UVB at floor level is not enough.
Check exposure at:
- Highest accessible branch
- Basking perch
- Mid-level branches
- Shaded resting positions
The snake must always be able to move through shaded elevated areas and choose complete UV retreat.
Important Information
This care sheet provides general husbandry guidance and does not replace species-specific research, specialist practical training, legal advice or veterinary advice. Individual requirements may vary.
The Boomslang (Dispholidus typus) is a dangerously venomous rear-fanged snake capable of potentially fatal envenomation. Rear-fanged dentition should never be interpreted as indicating insignificant venom.
Any suspected bite requires immediate emergency medical assessment. Clinically important effects may be delayed, so the absence of immediate severe symptoms should never be used as a reason to postpone medical assessment.
This care sheet deliberately does not provide step-by-step instructions for handling, restraint or physical manipulation of venomous snakes.
The Dangerous Wild Animals legislation applicable in Great Britain does not apply in the Republic of Ireland. Northern Ireland has separate dangerous wild animal licensing arrangements. Always verify the current requirements for the jurisdiction in which the animal will actually be kept.
Captive-bred animals of documented provenance should be strongly preferred.
If you have concerns about an animal’s health or care, consult a suitably experienced reptile veterinarian who is prepared and equipped to work with dangerously venomous reptiles.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026