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Kenyan Sand Boa
Reptiles · Snakes

Kenyan Sand Boa

Eryx colubrinus

Buried ambush predator with a calm natureBeginner

Lifespan
15-20 years
Size
Males 12-18 in, females 24-35 in
Social needs
Solitary
Time
Low - feed every 1-4 weeks
Cost
Low to Medium
Diet
Carnivore - frozen/thawed rodents

Overview

What is this animal?

  • Kenyan sand boas are small, stout African boas adapted to life buried in loose substrate, with eyes set high on the head for ambush hunting.
  • Females are noticeably larger than males, and the species is hardy and undemanding.
  • They spend most of the day hidden beneath the substrate, surfacing to ambush prey.
  • They are gentle, long-lived, and well suited to beginners who appreciate a secretive pet.

Temperament

  • These boas are calm and tolerate gentle handling, though they may feel insecure in the open and try to burrow into your hands.
  • They rarely bite defensively, but a strong feeding response means caution at mealtimes.
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  • Because they spend so much time buried, they are more of a display animal with occasional handling than one for frequent interaction.
  • Wash your hands before handling to avoid food-response strikes.

A good fit for

  • Beginners wanting a low-maintenance snake
  • Keepers with room for a 3 ft enclosure
  • Those who enjoy a fossorial, ambush species
  • People wanting a hardy boa with low running costs

Common mistakes to avoid

  • Strong feeding response - use tongs
  • High humidity causes respiratory illness
  • Spends most time buried, less handling
  • Substrate must be deep and kept dry

Enclosure

Minimum 6 sq ft of floor · 35 x 24 x 30 in

Must be housed alone. Solitary

  • A single adult needs an enclosure of at least 36 x 24 x 30 in, which lets even a large female stretch out; floor space matters most, and the height leaves room for a deep layer of substrate.
  • Provide at least 3-4.5 in of fine, loose substrate such as aspen or a sand mix so the boa can fully bury itself.
  • Maintain a warm surface basking spot of around 95°F and a cool side of 75-79°F with a thermostat-controlled heat source.
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  • Keep humidity low and the substrate mostly dry.
  • ReptiFiles keeps a hide with lightly moistened substrate or moss on the cool side for the snake to use as it likes, while some breeders raise humidity only during a shed; either way, the rest of the enclosure stays dry.

Check your enclosure

Supplies

Setup

  • Enclosure, sized for the adult snake
  • Heating and thermostat
  • Thermometers and hygrometer
  • Substrate, hides at both ends, water bowl

Ongoing

  • Frozen rodents in the right size for your snake
  • Freezer container or bin dedicated to feeder storage
  • Long blunt-tipped feeding tongs
  • Sealable bags or a thawing tub for warming prey
  • Heavy, tip-proof water bowl (big enough to soak in for most species; a small bowl on the cool side for rosy and sand boas, which are kept dry)
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  • Digital kitchen scale for tracking weight
  • Digital thermometer for checking prey temperature

Safe substrate: Sand-topsoil mix · Aspen shavings, kept dry · Paper towel or newspaper

Work out the cost

Care routine

Daily

  • Check temperatures and humidity
  • Look the animal over
  • Spot-clean waste and uneaten food

Every few days

  • Fresh water bowlevery 3 days
  • Short handling sessionevery 3 days

Weekly

  • Check every latch and vent
  • Watch for a shed cycle
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Every few weeks

  • Check for mitesevery 2 weeks
  • Feed a thawed rodent (adults every 2-4 weeks; juveniles every 1-2 weeks)every 2 weeks
  • Weigh-inevery 2 weeks

Monthly

  • Deep-clean decor, glass and bowls
  • Test thermostats, lamps and guards

Less often

  • Refresh the substrateevery 3 months
  • Check the UVB lamp's age and replace it if due (if one is fitted)every 6 months

Vet: Annual exam and faecal check, every 12 months

Tools

Is your enclosure big enough?Check your measurements against the recommended sizeWhat will it cost?Setup, monthly and over its whole life, itemisedCan it eat that?Search 15 foods, from everyday to never

Care in depth

Diet

Carnivore - frozen/thawed rodents
  • Sand boas are ambush predators fed frozen-thawed rodents matched to their girth.
  • Males take small mice while larger females take larger mice or small rats.
  • ReptiFiles feeds juveniles every one to two weeks and adults every two to four weeks, while some breeders feed adult females weekly and males every 10-14 days, so let body condition decide.
  • Adult males may fast for months in the breeding season, which is normal.
  • They often pull prey beneath the substrate to constrict, which is normal.
  • Use long feeding tongs, as their ambush strike is quick.
  • Avoid overfeeding, since buried, inactive snakes gain weight easily.
  • Feeding on a tile or in a separate container reduces the risk of substrate ingestion.

Health

Signs of good health, and the common problems
  • Kenyan sand boas are robust but can develop respiratory infections if kept too humid or cold, and scale problems if the substrate stays damp.
  • Because they burrow, clean, dry substrate is essential.
  • Watch for retained sheds; a humid hide on the cool side helps the snake shed cleanly.
  • To reduce impaction risk, many keepers feed off-substrate.
  • Quarantine new animals and check for mites.

Is this urgent?

5 warning signs and how fast to act, 2 of them right away

Most snake worry is about feeding, and most feeding worry is misplaced. Check the guide for this species' normal fast before treating a refusal as illness.

Go now

Open-mouth breathing, bubbles at the nostrils, or an audible whistleGo now. Respiratory infection. Most snakes have only one working lung, and even boas and pythons, whose second lung is much smaller, have little reserve.
Now
Cannot right itself, or holds the head and neck in an unnatural twist (a western hognose that rolls over and plays dead when disturbed, then recovers once left alone, is showing normal defensive behaviour)Go now. Neurological signs are always urgent in a snake.
Now

Today

Retained eyecaps after a shed, or a ring of stuck shed on the tail tipRaise humidity and provide a damp hide. Call if it is not resolved within a day. Almost always humidity that was too low during the blue phase. A constricting ring costs the tail tip.
Today

Soon

A regurgitated mealDo not offer food again for at least a fortnight. Check the warm-end temperature today, then call if it happens twice. Usually too cold, handled too soon, or a meal too large. Repeated regurgitation is a different and more serious problem.
Check today
Refusing food for longer than is normal for this speciesLog the refusal and check the species guide. For an adult ball python, a fast of about a month is not in itself a cause for concern, and much longer voluntary fasts are documented. Weigh weekly through it. The weight trend, not the calendar, is what tells you whether a fast matters.
Log it first

This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it, and the time to find one is before you need one.

Bedding and substrate

3 safe, 2 with a caveat, 3 to avoid

A dry-country burrower: the substrate has to stay dry and be deep and loose enough for the snake to bury itself.

Safe

Sand-topsoil mixAbout 60% plain topsoil to 40% play sand, at least 3-4.5 in deep so the boa can bury itself fully, and kept dry.
safe
Aspen shavings, kept dryLoose and easy to burrow in. Replace any patch that gets wet, because aspen moulds when damp.
safe
Paper towel or newspaperQuarantine, feeding response problems, and post-surgery.
safe

With a caveat

Cypress mulch and coco fibreThey hold humidity, which is wrong for a dry-substrate burrower and invites respiratory and scale problems.
with a caveat
Damp mossInside a humid hide on the cool side only, never over the floor.
with a caveat

Never

Pine and cedarThe same aromatic oils that make them unsafe in small-mammal bedding.
never
Calcium or vitamin sandSold as digestible, which encourages eating it. Implicated in impaction.
never
Uncovered heat mats and unguarded ceramic emittersNot a substrate, but the most common cause of contact burns. Every heat source needs a thermostat, and every emitter needs a guard.
never

Keep the enclosure dry. ReptiFiles keeps a humid hide of lightly damp substrate or moss on the cool side all the time, while some keepers offer one only during a shed. Feeding on a tile or in a separate container keeps substrate out of the meal.

Top resources for more info

Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-10-22.

YouTubers

Snake DiscoverySnake care and behaviour explained (run by a reptile shop)Lori TorriniSnake behaviour, enrichment and choice-based handlingReptiles and ResearchEvidence-led husbandry: enclosure size, UVB, thermal gradients, enrichment

Sites

Keep going

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Is your enclosure big enough?

These are the smallest sizes that give good conditions, not legal minimums. More room is always better.

Minimum 6 sq ft of floor · 35 x 24 x 30 in

Every figure, and where it comes from

Sized for the largest females, about 35 in; males stay much smaller. The floor meets Austria's legal minimum for one or two sand boas, 5.5 sq ft, and the height meets Switzerland's for small boas, three quarters of the snake's length, rounded up to 2.5 ft. The specialist and expert sources ask less height for a burrowing snake; the site sets its figure at or above the strictest legal minimum, because good conditions are never less than a law requires. Floor space and a deep layer of loose substrate are what a sand boa uses most; the enclosure checker tests the floor.

Minimum floor area6 sq ft of continuous, unbroken floor
As dimensions35 x 24 x 30 in
CompanyMust be housed alone. Solitary
The recognised standards do not agree on this one
ReptiFiles: The snake's length by half its length by half its length: 24 x 12 x 12 in for an average adult of 12-24 in, and more for females larger than average; its better enclosures include 36 x 24 x 19 in. The floor area this site uses is that of its better 3 x 2 ft enclosure. ReptiFiles strongly recommends going larger than the minimum. Checked 2026-10-23.
German expert report on minimum requirements for keeping reptiles (BMEL, 1997): Three quarters of the snake's length by half its length by half its length, for one or two: 27 x 18 x 18 in for a 35-inch sand boa. A minimum standard, recorded for context. Less than the figure used here. Checked 2026-10-23.
Swiss legal minimum (Tierschutzverordnung, Anhang 2, Tabelle 5, row 43a: small and medium-sized pythons and boas): As long as the snake, half its length wide and three quarters of its length high, for one or two: 35 x 18 x 27 in for a 35-inch sand boa. A legal minimum. The height this site uses follows it, rounded up to 2.5 ft. Checked 2026-10-23.
Austrian legal minimum for ground-dwelling snakes (2. Tierhaltungsverordnung, Anlage 3): 5.5 sq ft of floor and 16 in of height for one or two snakes of 20-39 in. A legal minimum, recorded for context. The floor used here is above it. Checked 2026-10-23.

What it really costs

Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.

Can a Kenyan Sand Boa eat that?

Whole prey only: frozen-thawed rodents sized to the snake, never live.

The full list: 15 foods

Never (14)

AlcoholNo safe amount at any body weight on this site.
never
AvocadoPersin, concentrated in the leaves, skin and stone. It damages the heart in birds and in many mammals, rabbits and rodents among them; it has not been studied in reptiles, so treat it as unsafe for them too.
never
CaffeineCoffee, tea and energy drinks. Cardiac and neurological toxicity at tiny doses for an animal this size.
never
ChocolateTheobromine and caffeine. Small mammals and reptiles cannot clear either.
never
Cooked, seasoned or processed meatNot whole prey: muscle meat lacks the bone and organs that make a rodent a complete food, and salt and seasoning do harm.
never
GarlicSame allium toxicity as onion, and more concentrated by weight.
never
Greens, vegetables and fruitSnakes are obligate carnivores.
never
Insect feedersNot part of a snake's diet, and loose crickets chew on resting or shedding snakes.
never
LeekAllium family. Same mechanism as onion and garlic.
never
Live rodentsA live rodent can bite and seriously injure a snake. Frozen-thawed only.
never
OnionOrganosulphur compounds damage red blood cells. The whole allium family is out.
never
RhubarbVery high in soluble oxalate, high enough to cause acute kidney injury. The leaves are worse than the stalks.
never
Salty or seasoned human foodSalt, oil and seasoning. Crisps, chips, seasoned leftovers and processed meat are all out.
never
Wild-caught preyParasites and rodenticide.
never

Everyday foods (1)

Frozen-thawed rodentsThe whole diet for these snakes. Choose prey no wider than the snake at its thickest point. Thaw fully in the fridge, then warm in a sealed bag to about 100°F and offer with tongs. One prey item per feed, at the interval in the species guide.
everyday food

That food is not on our list. A snake eats whole prey and nothing else, so if it is not a correctly sized prey item from the species guide, leave it out.

Whole prey is a complete food: snakes fed whole rodents need no supplement dusting.