reptile
Kenyan Sand Boa
Eryx colubrinus
Despite the shared common name, the Kenyan sand boa belongs to the sand boa family Erycidae and is only a distant relative of the Boa constrictor covered elsewhere on this site — the resemblance stops at live birth and a stocky build. This is a small, heavy-bodied, almost entirely burrowing snake that spends the overwhelming majority of its life under the substrate surface, periscoping just its eyes and nostrils above the sand to ambush passing rodents. Its blunt, short tail is patterned to resemble a second head, a defensive trick that confuses predators about which end is which. Combined with a genuinely calm temperament and a footprint far smaller than a full-size boa or python, that burrowing lifestyle is what makes the sand boa one of the more popular small pet snakes for keepers with limited space.
15-20 years in captivity, with some well-kept individuals reported past 25
Females 24-30 inches; males considerably smaller at roughly 12-16 inches — one of the more extreme size gaps between sexes among commonly kept snakes
Arid grassland, scrubland, and semi-desert of East Africa — Kenya, Tanzania, Somalia, and southern Sudan
Husbandry
- A 20-gallon long tank (30x12x12in) comfortably houses an adult female; males and juveniles need proportionally less — floor space for burrowing matters far more than height for this species
- Source: Association of Reptilian and Amphibian Veterinarians (ARAV) husbandry guidance (checked 2026-07-13)
- Warm surface 88-92°F (31-33°C) over an under-tank heater; cool side 75-80°F (24-27°C); this species thermoregulates from below the substrate rather than by basking, so belly heat matters more than an overhead bulb
- Source: Merck Veterinary Manual — Reptile Husbandry (checked 2026-07-13)
- 30-50% ambient — a genuinely dry-adapted species reflecting its semi-desert range, with no humid hide needed outside a difficult shed
- Source: ARAV husbandry guidance (checked 2026-07-13)
- One appropriately sized frozen-thawed mouse every 7-14 days for an adult, offered at night or left near the burrow entrance since this species often strikes from just beneath the surface rather than fully emerging
- Source: ARAV husbandry guidance (checked 2026-07-13)
- Solitary outside a deliberate, supervised breeding pairing — sand boas show no social bonding and two adults sharing an enclosure risks feeding-related injury and stress
- Source: Merck Veterinary Manual — Reptile Husbandry (checked 2026-07-13)
- 4-6 inches (10-15cm) minimum of fine play sand, a sand/soil blend, or aspen — deep enough for this species to fully bury itself, which it does for nearly all of its resting time
- Source: ARAV husbandry guidance (checked 2026-07-13)
Handling
Sand boas are among the calmer, more tolerant snakes kept as pets and rarely strike defensively once past a nervous first few weeks in a new home, though a freshly acquired animal may release musk or push firmly against a hand as it tries to burrow away from the perceived threat — normal, not aggression. Because this species spends nearly all of its time buried, a keeper should expect far less above-ground visible activity than with a corn snake or ball python, and shouldn't read that invisibility as a health concern on its own. When handled, a sand boa will often try to push its head into a sleeve, pocket, or the gap between fingers, replicating its natural burrowing instinct rather than attempting to escape outright.
Setting up the enclosure
Deep, loose substrate is the single most important setup decision for this species — at least 4-6 inches of fine sand or a sand/soil blend lets an adult fully submerge, which is how it spends most of its day in the wild and in captivity alike. A shallow-substrate setup borrowed from a colubrid or a typical python enclosure denies the animal its core natural behavior and is a common setup mistake specific to this burrowing family.
Why the lighting and heating numbers matter
Because a sand boa thermoregulates mostly from below rather than by basking on an exposed perch, an under-tank heater covering roughly a third of the floor, controlled by a thermostat, matters more here than an overhead heat lamp — the animal simply won't use a basking bulb the way a more surface-active snake would. No UVB is required for this largely fossorial, nocturnal-leaning species.
Feeding in practice
Feeding an animal that's usually buried takes a slightly different routine than feeding a snake that basks in the open: many keepers place a thawed mouse near the known burrow entrance in the evening and simply check the next morning, rather than watching for an active strike the way they might with a more visible species. Adults on the lower end of every-two-week feeding stay in good body condition; a visibly thin body with a noticeable spine ridge, not calendar days since the last meal, is the better signal that feeding frequency needs adjusting.
Common mistakes with this species
The most common mistake is substrate too shallow to allow real burrowing, which stresses an animal whose entire wild lifestyle is built around being under cover. A close second is running humidity too high in an attempt to match generic 'snake care' advice pulled from a tropical species — this is a genuinely dry-adapted animal, and persistently damp substrate raises the risk of skin and scale problems rather than preventing them. A third is mistaking normal extended burrowing for illness or hiding-from-stress, when for this species it's simply the default resting state.
Lifespan and what to expect
At 15-20+ years, a sand boa is a genuinely long-lived pet despite its small size, and the extreme sexual size difference is worth understanding at purchase — a female bought as a hatchling will eventually need the larger of the two enclosure footprints described above, while a male stays close to hatchling proportions for life. Like the boa constrictor covered elsewhere on this site, sand boas give birth to live young rather than laying eggs, typically 4-20 per litter for a mature, well-conditioned female.
Temperament in more depth
Individual temperament settles noticeably within the first few months in a new home — a sand boa that musks or resists handling as a recent acquisition typically becomes considerably more tolerant of brief, regular handling once established, and biting remains rare across the species even in animals that never become particularly outgoing. Because so much of this snake's life happens out of sight underground, many keepers judge wellbeing more by feeding response and shed quality than by any above-ground activity level.
Signs of good health
- Regular emergence to bask on the surface or investigate the enclosure, alternating with normal extended burrowing periods
- A round, evenly muscled body with no visible spine ridge or sunken sides
- A complete, single-piece shed including both eye caps
- A reliable feeding response over time, allowing for this species' naturally infrequent meal schedule
- Clear nostrils and no wheezing, clicking, or open-mouth breathing
Common problems
14 common reptile problems are tracked for this species; 0 have full guides published so far.
Recommended gear for this taxon
Equipment categories that are genuinely correct for this species' welfare needs — see the full Gear Guide for the complete list.
Digital infrared temperature gun
Measures actual basking SURFACE temperature, not just ambient air — a stick-on dial thermometer reads air temp, which is a poor proxy for the surface temp that drives digestion and thermoregulation.
Proportional (not on/off) thermostat
Holds a heat source at a stable target temperature rather than the wider swings an on/off thermostat allows — meaningfully reduces both overheating and cold-snap risk.
T5 HO UVB tube + reflector fixture
T5 HO output is more consistent across the basking area than compact/coil UVB bulbs, and a reflector fixture roughly doubles usable UVB output from the same bulb — match the % output to your species' sourced requirement and replace every 6-12 months regardless of visible light output.
Some links below are Amazon Associates / Chewy affiliate links — Keepers Guide may earn a small commission on qualifying purchases, at no extra cost to you. We only recommend equipment categories that are genuinely correct for the species' welfare needs; we never recommend a product because of the commission.
This is general educational care information, not veterinary diagnosis. For a sick or injured animal, see a qualified exotic-animal vet promptly — especially for anything acute (not eating combined with lethargy, breathing changes, bleeding, or any sudden behavior change). Nothing on this page substitutes for an in-person exam.