Giant African Millipede — Archispirostreptus gigas: Habitat and Care

Archispirostreptus gigas is an accepted African millipede; Spirostreptus gigas is its original combination. Trade names such as giant black millipede can cover other large species, so obtain a reliable identification and origin record. IUCN describes a broadly coastal eastern African distribution, not a generic western-African origin copied from an unrelated care sheet.

The long cylindrical body carries many short legs, generally two pairs per trunk diplosegment, with different arrangements near the front. It has one visible pair of antennae and no centipede-like predatory fangs. Large animals may approach 30 cm. A juvenile sold at a fraction of that length still requires a plan for the eventual adult and its below-ground needs.

Use a deep, airy mixture rich in suitably decomposed broadleaf litter, leaf mould and soft rotten hardwood. Specialist guidance recommends depth approaching the longest animal’s length; for a large individual, plan roughly 25–30 cm where the enclosure supports it. Depth recommendations vary, but a thin ornamental soil covering is not a sensible adult arrangement.

Mix nutritious material through the usable depth and retain a loose leaf surface. Plain coco fibre, fresh wood chips or a handful of crisp leaves over sterile filler do not provide equivalent nutrition. Verify source treatment and avoid resinous or chemically contaminated material. Add fresh suitable decomposed material before the substrate becomes largely fine frass, but do not replace everything while an animal may be moulting below.

Keep the substrate moist enough for burrowing without standing water, a sour anaerobic layer or a dripping base. Check gently at an accessible edge rather than excavating beneath the animal. A wet surface mist can conceal a dry lower layer, while repeated watering can flood the bottom even when the top looks comfortable.

A stable low-to-mid twenties Celsius working environment, commonly around 20–24°C in keeper guidance, is a practical starting point. Keep away from direct sunlight. If extra warmth is required, use controlled gentle external heating with a cooler refuge and independent measurement; avoid drying or overheating the entire burrowing layer from underneath. Ventilation and soil texture need to work together rather than being traded for a sealed humid box.

Use light resting cover and broad leaves, with most ground available for burrowing. Heavy stones, unstable logs and hollow objects with narrow openings can create crushing or trapping risks. If a structural piece is used, support it safely without blocking the deep feeding layer. Do not place a heavy ornament on loose soil and assume the animal will avoid digging underneath.

The BBA choices are optional cover materials requiring individual assessment, not a complete millipede substrate. Confirm treatment history and suitability before contact or feeding use. The tropical leaf-litter guide supplies visual and maintenance ideas, but it needs major adaptation for this adult: much deeper edible substrate, substantial floor area and low-disturbance access rather than a shallow decorative planted bed.

Dried Oak Leaves – Natural Aquarium Leaf Litter — Possible surface cover; only a verified suitable batch should enter the food environment, and dry leaves alone do not replace leaf mould.

Dried Beech Leaves (Fagus sp.) – Natural Aquarium Leaf Litter — An alternative leaf texture, subject to the same provenance and nutritional limitations.

Coco Boat – Dried Coconut Flower Spathe (Cocos nucifera) — Light low cover only if its actual size and edges are safe; not rotten-hardwood food or a heavy burrow roof.

Millipedes may remain below ground while moulting. Do not dig one up merely because it has not appeared for a meal or photograph. Disturbance can injure a soft animal or collapse its chamber. Keep routine moisture checks to an accessible edge, replenish food above ground and record sightings without trying to force a regular display schedule.

Avoid adding opportunistic animals as an automatic clean-up crew, especially around vulnerable moulting stages. A small appropriate springtail culture may be separately assessed, but mixed housing is not required for successful care. Some associated mites may be harmless, whereas a heavy unfamiliar load or obvious damage merits expert identification; do not treat every small hitchhiker with chemicals.

The species reproduces sexually, and compatible mature animals may breed under suitable conditions. Eggs and small juveniles can remain hidden in the nutritious substrate. A keeper who does not want offspring should plan the social arrangement before combining adults; the absence of visible young is not proof that no eggs are present.

Young millipedes need appropriately moist food-rich ground and containment scaled to their small size. Examine spent substrate carefully during gradual renewal. Do not promise one fixed maturation time or brood size across different conditions. Record the identity and source of every transfer, and do not exchange an unidentified large black millipede under the assumption that all such animals are A. gigas.

If handling is necessary, let the animal walk onto broad supported hands held close to a safe surface. Never pull attached legs from skin or uncoil a tightly defensive animal. Millipedes can release irritating defensive secretions, so keep them away from eyes and mouth and wash hands afterwards; harmless-looking does not mean suitable for unrestricted handling.

Investigate persistent decline by checking deep moisture, nutrition, temperature, contamination and recent disturbance. Lack of surface activity alone is not a diagnosis. Obtain responsibly sourced, reliably identified stock, check applicable movement rules and never release animals or viable substrate. BBA sells materials rather than millipedes; an appealing naturalistic scene still needs a species-specific long-term care plan.