Kenyan Sand Boa

Key numbers

The figures below are a working snapshot of what a typical Kenyan sand boa needs, rather than a guarantee that every individual will fit them exactly. The rest of this guide explains the reasoning behind each number, so you can adjust sensibly when your own animal or your own house behaves a little differently.

• Adult size: Males commonly reach about 15 to 20 inches, while females often reach about 24 to 32 inches and are heavier.
• Lifespan: With consistent care, they often live 15 to 20 years or more.
• Adult enclosure: An enclosure about 36 inches long by 18 inches deep is a practical minimum for a large female, and many males do well in a smaller footprint if the substrate is deep enough and the gradient is right.
• Start size: A neonate can begin in a secure tub or a 10-gallon, as long as the warm surface, cool side, and lid are right, then move up as it grows.
• Housing: Keep one snake per enclosure.
• Warm surface / warm burrow: The surface the snake actually sits on or burrows under at the warm end should read about 90 to 95 F.
• Cool side: The cool side should sit at about 70 to 75 F.
• Night: Nighttime temperatures from the mid-60s to the low 70s are usually fine in a typical house.
• Humidity: Keep humidity around 30 to 50 percent most of the time, and provide a humid hide when the snake is in shed.
• Diet: Feed a single appropriately sized rodent, usually frozen-thawed.

Do’s and don’ts

This list is the short version of the husbandry covered in detail further down the page. If a line here and a paragraph later on ever seem to pull in different directions, trust the longer explanation, because it carries the context that a one-line rule cannot.

Do

• Give an adult enough floor space for a warm end and a cool end that actually differ, plus several inches of loose, dry substrate so the snake can disappear.
• Measure the warm surface under or in the warm burrow with an infrared gun, not a sticker on the glass.
• Keep the enclosure on the dry side, and offer a humid hide when the eyes go cloudy (in blue).
• Offer frozen-thawed mice with tongs. Fossorial ambush feeders often respond hard to movement near the substrate.
• Learn that individual’s ordinary patterns so a missed meal, a week underground, or restless surface roaming can be read against a baseline.
• See a veterinarian who regularly treats reptiles when breathing, body condition, or shed quality leaves that baseline (local herp groups and exotic-vet directories help you find one before you need them).
• Send a picture if you find a heavy-bodied patterned snake on a property near Cartersville and want an ID. If you want it moved, we relocate snakes within about an hour of Cartersville at no charge.

Don’t

• Do not leave a large adult female in a shoebox forever because “sand boas stay small.”
• Do not house two Kenyan sand boas together.
• Do not run the enclosure wet the way you would for a tropical boa.
• Do not use a hot rock or an unregulated heat pad as the main heat.
• Do not use pure sand as the only bedding and call it done. The common name is not a substrate recipe.
• Do not handle for a couple of days after a meal, or while the snake is in blue (cloudy eyes before a shed).
• Do not release a pet sand boa, or any pet snake, into Georgia woods.
• Do not dig blindly through the substrate with bare fingers after a feeding cue. Use tongs.

A bit of background

The Kenyan sand boa, Eryx colubrinus, is a compact Old World sand boa from arid and semi-arid country across parts of East and Northeast Africa, including Kenya, Tanzania, Sudan, Ethiopia, Egypt, and neighboring areas. You will still see the name Gongylophis colubrinus on older care sheets and some trade labels, but molecular work has generally returned African sand boas to Eryx, which is the name used by current taxonomic references such as the Reptile Database and ITIS. The husbandry does not change with the spelling on an invoice. What does shape the setup is the species’ fossorial habit: these snakes live in loose soil and sand and hunt from cover, so a glass box with a flimsy hide on a paper towel is the opposite of what they need.

Kenyan sand boa (Eryx colubrinus loveridgei) coiled portrait — orange/cream blotches, blunt head, and stocky fossorial build (not a rubber boa or boa imperator). Stock photo (Wikimedia Commons — Daiju Azuma, CC BY-SA 2.5).

Kenyan sand boas became popular because adults, especially males, stay a manageable size, and because established animals are often calm when lifted. That reputation sometimes sells them as “easy beginner boas.” A sand boa that spends most of the day underground is not broken; it is simply doing ordinary work. The keeper’s job is to provide deep, dry substrate, a measured warm surface, a secure lid, and frozen-thawed rodents offered in a way that does not teach the snake that fingers are prey.

Adult males commonly reach about 15 to 20 inches and females about 24 to 32 inches, and they often live 15 to 20 years or longer in captivity. This guide covers general husbandry for Eryx colubrinus; individual animals vary, and nothing here replaces an examination by a veterinarian who regularly sees reptiles.

Because this is not a Georgia native, two extra points belong up front. First, a pet sand boa that gets loose is not a wild animal and should never be turned out “to be free.” Second, a heavy, blotched snake that someone finds on their land near Cartersville is far more likely to be a local species than an escaped Kenyan. If you would like an identification, send us a picture, and if you would like the snake moved, we relocate snakes within about an hour of Cartersville at no charge.

Whether they are a good fit

A Kenyan sand boa is a long-lived burrower from dry country that needs deep substrate, a reliable warm surface, and a keeper who will use tongs. Sand boas are a poor fit for anyone who wants a snake that is out and visible every evening, for a household that will keep the enclosure tropical and wet, and for anyone who digs through the bedding with bare hands after opening the lid. Much of a sand boa’s ordinary day is spent underground.

Enclosure and space

Floor space matters because an adult needs a warm end and a cool end with real distance between them, and because this species burrows. A practical minimum for a large adult female is about 36 inches long by 18 inches deep, with enough height for several inches of substrate and a water dish that will not tip. Many adult males do well in a smaller footprint, provided the warm and cool ends genuinely differ and the substrate is truly deep enough to burrow in. A neonate can start in a secure tub or a 10-gallon tank if the warm surface and lid are right. Move it up as it grows, rather than leaving a heavy adult in a shoebox.

Captive Kenyan sand boa on fine sand — floor space and several inches of diggable substrate matter more than height for this burrower. Stock photo (Wikimedia Commons — Viki, CC BY-SA 3.0).

Keeping one snake per enclosure avoids most social problems, and Kenyan sand boas do not need a companion. When two animals share one gradient, one usually claims the better warm burrow, and feeding two in the same enclosure is how keepers get bitten by the wrong snake.

Deep, loose substrate, a humid hide the snake can enter and leave, and a water bowl heavy enough not to tip do far more good than a pile of decorations. Support rocks and caves from below so the snake cannot collapse a tunnel on itself, and fit a lid that latches, because sand boas become patient escape artists once they decide to explore a gap.

Temperature and the gradient

A Kenyan sand boa’s digestion depends on temperature. The measurement that matters is the warm surface the snake actually coils on or under, taken with an infrared temperature gun. A stick-on thermometer on the glass can show an acceptable air temperature while the burrow floor is too cool for digestion or hot enough to burn.

Close-up of wild-type Kenyan sand boa patterning — measure the warm surface the snake actually sits on or under (~90–95 F), not a sticker on the glass. Stock photo (Wikimedia Commons — The Reptilarium, CC BY-SA 2.0).

A warm surface of around 90 to 95 F supports normal digestion for most adults, while the cool side of the same enclosure typically sits around 70 to 75 F. The difference between those two ends is what allows the animal to regulate its own temperature; if the whole enclosure sits at one temperature, it has nowhere to go.

Heat is safest when it is controlled by a thermostat. Under-tank heat or heat tape on the outside of a tub works well for a burrowing snake, provided the probe sits where the snake sits and you verify the surface with a temperature gun. Overhead halogen can also work if a warm platform or shallow burrowing zone reaches the target. Unregulated heat mats and hot rocks are a frequent cause of burns. Overnight, a typical house in the mid-60s to low 70s is usually acceptable, and colored night bulbs are unnecessary.

Light, UVB, and the daily cycle

At the surface, Kenyan sand boas are largely nocturnal and crepuscular, meaning they are most active at night, at dawn, and at dusk. They do not need a bright array of desert lights the way a bearded dragon does, but they do need a clear day and night. A simple schedule of 12 hours on and 12 hours off, even if the “on” period is just room light, is much easier on them than lights that switch at random hours.

Some keepers provide low-level UVB for this species, but it is never a substitute for a correct thermal gradient. Keepers who offer UVB generally choose a moderate, forest-strength linear tube and give the snake enough substrate depth and cover to get away from it. If you use a heat lamp, remember that it provides heat only, not UVB.

Humidity, water, and shedding

Sand boas are snakes of dry country, and ambient humidity of around 30 to 50 percent is typical of a setup that works. When the eyes turn cloudy, a stage keepers call being “in blue,” and the snake is about to shed, a humid hide filled with damp sphagnum or moss that it can enter and leave is usually enough, without wetting the whole enclosure.

In this species, chronically wet substrate, especially on a cool floor, commonly leads to scale rot and respiratory trouble, while chronically bone-dry air with no humid hide commonly leads to stuck eye caps. What you want is substrate that is dry to the touch for the snake to burrow in, with a humid hide available.

A healthy shed comes off in one piece, including the eye caps, and patchy sheds that keep recurring usually point to a humidity or hydration problem or to an animal that is not in good condition. Keep a shallow, clean water dish available at all times; deep dishes that invite constant soaking are a poorer choice for this species.

Diet

In the wild, Kenyan sand boas ambush small mammals and other small vertebrates from beneath the surface. In captivity they are kept on rodents, because that is the diet we can source cleanly and consistently. Neonates usually start on mouse pinks, which are newborn mice, and adults typically move up to mice sized so that the prey is about as wide as the snake at mid-body; large females may take larger mice than males. Offering frozen-thawed prey that has been warmed all the way through, using tongs, avoids most feeding bites. Prey left on the surface near the warm end, or presented with tongs at the substrate surface, matches the way they hunt far better than leaving a live mouse in overnight.

A live rodent left in the enclosure overnight can chew on a snake that is not hungry. This species also often has a strong feeding response to vibration and movement in the bedding, which is why we feed with tongs and never dig with bare fingers after opening the lid.

Young animals are commonly fed every 5 to 7 days, while adults often go 7 to 14 days between meals, and body condition is a better guide than the calendar. A sand boa that folds in on itself with fat pads is being fed too often or too much, while one with a sharply triangular body and a thin tail is being fed too little or is ill. Postpone handling for a couple of days after a meal.

Substrate

Deep, dry, diggable substrate is the defining husbandry detail for this species, and aspen shavings are the usual dry, burrowable floor covering. Plan on enough depth for the snake to genuinely disappear, roughly four to six inches as a working minimum for many adults and deeper for a heavy female that digs hard. A dry soil-and-sand mix can work in a naturalistic enclosure as long as it stays dry, the snake is warm enough to digest, and rocks are supported from below.

Pure sand as the only bedding is a poor default: it is dusty, it does not hold a tunnel the way aspen or a soil mix does, and when a cool or dehydrated snake swallows a lot of it along with a meal, impaction can follow. The common name describes the habitat; it is not a recipe for a pile of sand. Offer food with tongs rather than letting it land in the bedding, and keep the warm surface in range. Cypress and coconut substrates kept damp are a better match for a different kind of snake.

Paper works well during quarantine. Whatever you use on the floor needs to stay dry enough that the snake is never lying in wet mulch, and feces should be removed as soon as they appear. Cedar and aromatic pine should never be used as bedding.

Handling and daily life

Most captive Kenyan sand boas will rest calmly in a hand once they are used to being picked up, provided they are supported along the body and not pulled out of a burrow head first after a feeding cue. Short, calm sessions once the snake has had a chance to settle go far better than daily wrestling matches. Hold off on handling for a couple of days after a meal and while the snake is in blue.

Head close-up — shovel-like snout and small eyes for sand swimming; dig with tongs, not bare fingers, after a feeding cue. Stock photo (Wikimedia Commons — Dawson, CC BY-SA 2.5).

A snake that spends most of its time underground is not “unhappy.” Digging for a buried snake right after the lid opens is how keepers get surprised by a feeding response, so look first, and use tongs if you are unsure.

Body language and behavior

Kenyan sand boas are easy to misread, because staying out of sight can look like boredom and a sudden strike from the substrate can look like meanness, and people tend to attach human stories to both. A snake that stays buried for days is usually just doing ordinary burrowing work, not feeling depressed, and a closed-mouth strike at the tongs is usually a feeding response, not a diagnosis of its personality. Anthropomorphizing, which means treating the animal as if it had human motives, moods, and social needs, is how keepers miss the information that actually matters: whether this individual is using both ends of the gradient, eating on its own pattern, shedding cleanly, and breathing with its mouth closed.

The more useful habit is to learn the patterns of the particular animal in front of you, such as how much of the day it spends buried, whether it usually surfaces after the lights go out, and how it reacts to the lid compared with the tongs. Once you know that baseline, it is a change from it that matters.

Signals that are usually ordinary

Tongue-flicking at the surface is simply how the snake samples the air, and burrowing out of sight for most of the day is ordinary behavior for a burrowing species. Resting with only the snout or eyes showing at the substrate line is an ordinary ambush posture. Dull, bluish skin and cloudy eyes mean a shed is on the way, and hiding for a few days around that shed is ordinary.

What to watch for

• Open-mouth breathing, wheezing, or bubbles at the mouth or nose point to a respiratory problem.
• Regurgitation, or a snake that strikes and then refuses to finish its meal, is a reason to check the warm-surface temperature and how soon the animal was handled after its last meal.
• Stuck eye caps or ragged sheds that keep recurring usually point to a humidity or hydration problem.
• Belly scales that are brown, pink, or blistered, or a snake lying in wet substrate, suggest scale rot.
• Weight loss during a hunger strike, or a sand boa that was a reliable eater and has stopped, is a reason to check temperatures first and then see a reptile veterinarian.
• A snake that cannot right itself or that corkscrews is showing neurological signs, which are not something to wait out.

If you notice any of these patterns, check your husbandry first, and then see a reptile veterinarian if the animal does not return to its own normal baseline.

Problems that show up often

Respiratory disease usually follows an enclosure that is too cold, or cold and damp together, and scale rot follows wet, dirty substrate. Obesity is common in animals that are still fed as though they were growing after they have finished growing. Stuck shed is less common when a humid hide is available and the water bowl is kept clean. A feeding bite is more often a handling-and-tongs problem than a sign of a “mean snake,” and impaction tends to follow pure sand bedding, temperatures too cool for digestion, and prey offered in a cloud of dusty bedding.

An escaped pet is a husbandry problem of a different kind: check the lid, then search the house, and never release the animal outside.

Bringing a new animal home

A quarantine period in a separate enclosure, with its own tongs, its own water bowl, and a fecal check, is a much kinder start than placing a new snake into a display vivarium on its first day. A common working window is about 30 to 90 days, or until the snake’s appetite is steady and a fecal test comes back clear, and longer if anything seems off. Before decorating, confirm that the warm surface reaches the right temperature and that the substrate is dry and deep. Leave the animal alone long enough for it to eat at least a couple of meals before you begin regular handling, and use tongs from the very first feeding. Those first weeks are also the time to start learning its ordinary behavior, including how much of the day it spends buried.

Recommended gear

Some of the links below go to Amazon, and if you buy through them we may earn a small commission. This does not change the price you pay.

When you are budgeting, remember that deep, dry aspen, a thermostat, a temperature gun, and a pair of tongs matter far more than decorations, and that floor space for a large female matters more than a pretty desert backdrop.

• New Age Pet ECOFLEX 36-inch Mojave Reptile Lounge for a typical large adult female, or a secure tub of similar footprint
• Etekcity Lasergrip 774 for the warm surface the snake sits on
• ThermoPro probe thermometer and hygrometer to track air temperature and humidity
• BN-LINK on/off thermostat for a heat mat. Use a dimming stat if the heat is a bulb
• Aspen snake bedding deep enough to burrow
• Snug opaque hides including a humid hide with damp sphagnum
• Zoo Med stainless steel feeding tongs, 10-inch