Avicularia minatrix — Fact Sheet

Avicularia minatrix · Avicularia minatrix

Full care guide and sources

📋 At a glance

🏠 Enclosure

An adult can use a secure vertical enclosure around 20 x 20 x 30 cm. Ventilation holes should cross at least two opposing sides, including openings above and below the retreat zone. The lid or door must open without tearing down the upper web, and every gap must be smaller than the spider’s carapace. Start tiny spiderlings in proportionally small ventilated containers so prey and hydration can be monitored.

🪨 Substrate and furnishings

Use unfertilized topsoil, coco fibre, or a loose soil-coco mix. Deep burrowing substrate is unnecessary, but the base should absorb overflow and let the keeper remove contaminated patches. Avoid perfumed mulch, fertilizer, pesticide residues, sharp wire, and loose fibers that can snag legs.

Cork bark should be firmly wedged so it cannot fall when webbed. Artificial leaves, small branches, and a strip of clean leaf litter provide anchors. Keep the upper third structurally rich but leave room to move a catch cup around the animal. Top-only ventilation is insufficient; mesh may also catch tarsal claws and is best avoided.

Spot-clean prey remains and obvious waste without dismantling an intact retreat. Replace all substrate only for contamination, persistent pests, or a necessary rehouse. A webbed-shut entrance usually signals premolt or a period of rest, not an invitation to open it.

💡 Lighting

UVB and basking lamps are unnecessary. Give 10-12 hours of indirect room light followed by a dark period. Direct sun can overheat a small acrylic enclosure within minutes.

🌡️ Temperature

Maintain roughly 20-25°C during the day and allow nights around 19-22°C. This conservative captive range overlaps specialist husbandry recommendations without forcing the spider to endure outdoor daytime extremes. Persistent heat above 27-28°C is more dangerous than a mild night drop because a small arboreal enclosure dehydrates quickly.

Warm the room if possible. If supplementary heat is unavoidable, use a low-power thermostatically controlled source outside one side of the enclosure, never beneath it and never covering ventilation. Measure near the upper retreat as well as lower down. A spider repeatedly abandoning the web, stretching near vents, or sitting beside the water dish may be too warm or poorly ventilated.

💧 Humidity and water

Do not keep the enclosure continuously wet to chase a percentage. A broad 60-75% reading may occur after watering, but clean water, brief wet-dry cycles, and air exchange matter more than the hygrometer. Old advice that combined saturated substrate with little airflow contributed to avoidable losses of pinktoe tarantulas.

Keep a shallow dish full. Lightly overflow it onto one corner, then let exposed surfaces dry. Once or twice weekly, depending on room dryness, place a few droplets on webbing or foliage in the evening without spraying the spider. Spiderlings need closer hydration checks because their small containers dry fast, but they also fail quickly in stale condensation.

Condensation that persists all day, a sour smell, or mold spreading through the web indicates excessive water or inadequate cross-flow. A shrunken abdomen and repeated drinking indicate dehydration. Correct the cause gradually; never flood the silk tube.

🪳 Feeding

Offer captive-reared crickets, small roaches, or locusts where legal. Prey should normally be no longer than the spider’s abdomen. Tiny slings can take flightless fruit flies, pinhead insects, or a small piece of freshly killed prey twice weekly. Juveniles commonly feed every 5-7 days, while adults in good condition need an appropriate item every 7-14 days and sometimes less.

Place prey near the web entrance after dusk. Remove it within 24 hours if ignored, and never push prey into a sealed tube. Stop feeding when the abdomen darkens, the spider refuses repeatedly, or the retreat is closed. Live feeders can injure a soft molting tarantula.

After a molt, wait until the fangs are completely black and the body is firm—usually several days for juveniles and about 7-10 days for adults—before feeding. Adjust quantity to abdomen condition rather than a rigid calendar. Calcium and vitamin powders are not required for a whole-prey tarantula diet.

☠️ Safety

A bite from Avicularia minatrix can cause puncture wounds, pain and swelling. Human bite reports are too uneven to predict an individual reaction or assign a precise venom potency to every species. Do not interpret a quiet animal or a “mild venom” label as permission to handle it.

Urticating hairs are a separate hazard: they can irritate skin and injure eyes. Avoid rubbing exposed skin or eyes; suspected eye exposure needs prompt medical assessment. Keep your face away from the enclosure and wear eye protection and gloves when removing molts or used substrate.

Use long tools and a catch cup, with a second containment tub for transfers in a closed room. Keep hands out of retreats and webbing, do not hand-feed, and do not chase an escaping spider. Keep transfers low to limit fall injuries to the animal.

After a bite, wash the wound with soap and water and contact a poison centre or medical service with the scientific name and time of exposure. Seek urgent care for severe or spreading pain, muscle cramps or persistent symptoms; call emergency services for breathing difficulty, throat swelling or collapse. Do not cut the wound or try to extract venom. Treatment focuses on wound assessment and symptom control under medical supervision.

🩺 Health — warning signs

• Stale damp housing can cause abrupt decline; increase cross-ventilation and stop routine saturation.
• A wrinkled abdomen or persistent drinking suggests dehydration; refill the dish and review heat and watering.
• Wandering at the lid often means the retreat lacks anchors, has been kept too wet, or is repeatedly disturbed.
• Mold, mites, and phorid flies usually follow retained prey remains and wet organic waste.
• Long fasting and a sealed web are normal before molts. Do not tear the retreat open.
• A fall, leaking hemolymph, severe uncoordinated movement, eye exposure to hairs, or a clearly stalled molt needs advice from an exotics veterinarian familiar with arachnids.

Never apply household insecticide, essential oil, dog or cat mite medication, or disinfectant fumes near the enclosure.