Warm area, cool area and hides

If heating is specified, place it at one end and distribute hides between that area and the cool side. Choose openings and internal space suitable for the body; after adding bedding, check that entrances remain clear. Set the dish on a stable base and leave routes between retreats; use low supports only where suitable for the species.

Burrowing and furnishing stability

Secure rock and platform supports to the floor before adding substrate to the specified depth. Leave a continuous digging area and remove material beside bases as a test: furnishings must remain supported. Complete the digging layer before adjusting lamp heights, as it changes the height the animal can reach.

Testing and access

Connect specified heat sources to compatible thermostats and guard against contact. Secure probes according to device instructions; measure air at resting sites and heated surfaces separately with independent instruments. In housing with water, also check water temperature and quality: one zone’s thermostat does not control the others.

With the complete enclosure running, record day and night readings and compare them with the sheet. Test doors, cable openings and cleaning access, keeping vents clear. Change one variable at a time and recheck after each adjustment.

Light in the animal’s daily life

Maintain burrowable substrate and a UV patch at retreat exits. Substrate layout must not force exposure just to find a suitable temperature.

An example layout in the enclosure

To make the layout concrete, take housing measuring 60 × 30 × 30 cm, using the first dimensional configuration in the sheet. This is a mounting example: retain the conditions and any alternatives attached to the stated minimum.

In a wooden enclosure with internal lighting, imagine the tube 25 cm above the floor and the back or head at 10 cm. The geometric distance is therefore 15 cm. The branch or platform lies below animal height, according to body size. Place lighting over one side, with a route to fully screened retreats.

In a glass enclosure with a mesh roof, retain the same animal height and imagine the tube 5 cm above the mesh: distance becomes 25 cm. Mesh attenuates UV variably; ordinary glass roofs block UVB. Increasing the percentage alone is insufficient: measure beneath the mesh and adjust height, output or layout as needed.

These distances describe the example, not a safe clearance for every lamp. Select the source and adjust mounting until approximately UVI 2–3 is measured at animal height in the exposed position. Also respect the minimum clearance specified for the model used. Recheck with furnishings, guards and mesh installed, including the highest reachable points and animal growth.

Choosing and checking lighting

First define the patch that should illuminate the whole body and the route to a screened retreat. For a broad patch, select a linear tube with reflector; consider a compact only if its useful patch covers the body and leaves an accessible gradient. Check model, output, reflector and mounting distance, then compare measured UVI with the species target. Label UVB percentage alone cannot determine distance and intensity.

The decisive check uses a UVI meter facing the source at animal height. Check the centre and edges of the exposed patch, the highest supports and retreats, which must allow withdrawal from UV. Repeat after moving equipment, changing lamps and plant growth. Without a meter, use the manufacturer’s instructions and measurements for the exact configuration, including safety clearances.

When UVB or UVA are absent

When UVB is absent, an appropriate whole-prey diet can provide vitamin D3; do not automatically add supplements to prey. Dietary provision does not recreate every effect of light, so retain plans for controlled UVB exposure.

UVA contributes to environmental perception and behaviour and cannot be replaced by vitamins or calcium. A reptile UVB source normally also emits UVA: check its declared spectrum. If the existing lighting lacks it, complete the installation with a suitable source; an ordinary white LED does not guarantee UVA and a UVA-only lamp does not provide UVB.

Sex, maturity and readiness

An adult female is much larger than a male: confirm sex and assess condition in relation to this dimorphism. Do not plan the first pregnancy merely because a male of the same age is already sexually active.

Start a record for each breeding animal with identity, origin, documented age and previous weights. Compare the weight trend with growth and body condition; delay introductions for animals still growing rapidly, losing weight or recently acquired. Use stated ages as guidance alongside these checks. If sex cannot be identified reliably, obtain assessment by qualified personnel before pairing.

Preparation and seasonal cycle

Keep seasonal changes within conditions compatible with this species rather than importing cold colubrid brumation. Arrange separate meals and record introductions; burrowing substrate must not prevent checking that both animals remain healthy.

Before encounters, prepare and test offspring enclosures and have first foods available. Check records for regular adult feeding and good body condition, then verify access from exposed areas to retreats. If the species protocol includes seasonal changes, adjust settings gradually and record the response. Record night-time air, surface and egg temperatures separately, noting where each is measured. Keep water available throughout preparation.

Courtship and mating

Introduce only identified, compatible adults, with another enclosure ready. Observe from a distance and end the encounter if you observe persistent pursuit, injuries or an animal unable to move away from its partner; do not forcibly separate animals during copulation. Record the date, both identities and what you actually saw: courtship, contact or mating alone does not prove fertilisation.

Pregnancy and preparation for birth

It is live-bearing: a pregnant female needs shelter, thermal choice and quiet rather than an egg incubation container. If she continues eating, offer manageable prey and log intake; do not enlarge portions to compensate for every refusal.

Gestation and birth

Gestation is described on the order of 4–6 months; captive accounts often report 6–18 births, with variation. Prepare housing before the expected window: birth may occur at night and the first observed introduction is not a certain fertilisation date.

Maintain the usual gradient, shelters and free access to water; the female must be able to move away from warmth. Prepare a cleanable surface and observe without repeatedly moving her. Count offspring after birth has finished; do not pull membranes, cords or still-attached young. Remove birth material after the animals have separated.

First meals and juvenile care

Separate neonates after birth, with a simple floor for checking water and droppings and a secure hide. The first shed may occur about a week after birth; then offer a very small newborn mouse and monitor intake and growth individually.

During the first weeks, monitor each youngster: a feeding group does not guarantee that every individual eats. Record intake, droppings and weight at regular intervals to follow growth and adapt housing and food size. Provide separate accommodation if competition prevents an individual from feeding or size differences become marked. Document repeated independent meals before transfer to another keeper.

Female recovery

After reproduction provide water and the usual balanced diet, initially in manageable portions; monitor weight, activity and return of appetite. Keep supplements and lighting consistent with the feeding guide. Avoid further introductions until the previous condition has recovered; later clutches may occur without another mating. Persistent straining, weakness or protruding tissue require veterinary attention, without squeezing the abdomen.

Equipment and example diary

Prepare the female’s enclosure, dividers or neonatal enclosures according to the species’ social structure, shelters, accessible water, thermostat and probes, scales and first foods. An incubator is unnecessary: reserve space and time for monitoring offspring and mother.

A consistent diary using actual dates helps follow reproduction in Eryx colubrinus. Start with adult identity, weight and condition, then record observed encounters, laying or birth and development conditions. After emergence record the first meal actually accepted and each youngster’s growth while continuing to follow female recovery. Over time these records help identify your lineage’s pattern without turning approximate durations into deadlines.