Grammostola pulchra

🔤 Taxonomy

Grammostola pulchra is the currently accepted name of the Brazilian black tarantula. World Spider Catalog lists Brazil as its distribution. Very similar black Grammostola from Uruguay may be G. quirogai, so exact identity and breeder records matter when buying or breeding.

English common names used in the hobby:

• Brazilian black tarantula

📌 Description

Grammostola pulchra is a heavy-bodied New World terrestrial tarantula kept mainly as a display invertebrate. Adults are usually 6-7 cm in body length and 15-18 cm in legspan. Females may live 20 years or more, while males have a much shorter adult life after their final molt. Its famously slow growth means a small sling is a long project rather than a quick route to a black adult.

It should not be handled routinely. Even an individual considered calm can bolt, fall, bite, or flick urticating hairs when stressed. Calm behaviour is useful during maintenance, but it is not consent to handling. The keeper’s job is to provide a secure enclosure, stable moisture gradient, safe fall height, and enough privacy for normal feeding and molting.

🌍 Distribution

World Spider Catalog currently lists G. pulchra from Brazil. A 2023 redescription documented records in Rio Grande do Sul and clarified its distinction from similar southern South American Grammostola. Older hobby accounts often extend the name into Uruguay, where visually similar stock may instead represent G. quirogai.

The documented habitats include open grassland and Pampa landscapes with pronounced seasonal conditions. The spider avoids outdoor extremes through a terrestrial retreat, so captive care should provide secure cover, a moisture gradient, measured warmth, and room to move normally.

Range notes are most useful when they explain how the animal finds cover, water, warmth, and safety; avoid turning them into sudden swings in the enclosure.

🌡 Climate across the native range

Monthly climate normals from reviewed GBIF occurrence locations:

Weather data by WorldClim v2.1 · Monthly normals queried by Herpeton Academy from raster values; relative humidity is derived from vapor pressure and mean temperature.

Location references use GBIF.org occurrence data where available; original occurrence records retain their source dataset licenses.

⚖️ Legal status

As checked against current official sources in April 2026, Grammostola pulchra is not currently listed in the CITES Appendices, and no species-specific EU wildlife-trade Annex listing was found. It is not relevant to the Bern Convention unless a country applies separate native-wildlife rules. Local rules on ownership, import, sale, transport, breeding, invasive-species control, dangerous-animal licensing, and proof of lawful origin may still apply; keep purchase and breeding records.

🤌 Husbandry

Babies or slings should start in smaller secure enclosures such as small ventilated deli cup or similar secure starter container for tiny slings, upgraded gradually. Smaller starter housing makes feeding, molts, hydration, and waste easier to monitor. Adults need the full planned enclosure, stronger locks or lids, and more stable environmental zones. Do not buy a young animal unless the adult housing, food supply, and legal responsibilities are already realistic.

This slow-growing species rewards patience. Long fasting periods can be normal when the abdomen remains rounded and the spider is settled, but shrinking, weakness, or a collapsed posture means hydration and enclosure conditions must be checked immediately.

For adult animals, make the enclosure secure before making it decorative: firm lid, safe ventilation, stable water dish, deep substrate, and limited fall distance.

For spiderlings and juveniles, stability matters more than display. Keep the container small enough to locate prey and check molts, but include cover and a moisture choice so the animal is not forced to sit in the open.

After each molt, reassess the space rather than rehousing by calendar. Upgrade when the spider can no longer turn comfortably, the water dish and hide crowd the usable floor, or maintenance cannot be done safely. Wait until the new exoskeleton and fangs have hardened before moving a freshly molted animal.

House one animal per enclosure. A practical adult enclosure is 30 x 20 x 20 cm for one adult; 30 x 30 x 25 cm is more comfortable. Larger is useful when it creates more usable movement, better gradients, and safer maintenance. Use secure ventilation and stable furnishings. Keep simple notes on feeding, molts, weight changes, and behaviour, and quarantine new animals before adding them to the collection.

For quarantine, keep the new spider in a separate area with dedicated tools and simple furnishings long enough to observe feeding, waste, mites, and a molt if practical. Record its source and claimed identity, especially when it is sold as Brazilian black stock. Routine care should be limited to water, feeding, and spot-cleaning; repeated rearrangement makes a slow-settling spider less secure.

💡 Lighting

A clear 10-12 hour day-night cycle is useful. Ordinary room light is enough for tarantulas; UVB and bright basking lamps are unnecessary. Avoid visible night lights and any lamp that dries the enclosure or overheats retreats.

🌡 Heating and temperature

Aim for 22-26 °C, with overheating above 29 °C avoided. Measure with digital probes and use an infrared thermometer for any warmed surfaces. Any supplemental heat should be controlled by a thermostat. Tarantulas are usually safer with warm room temperatures or gentle side heat rather than hot lamps or under-tank pads.

Cooler seasonal room temperatures can reduce appetite without requiring artificial winter cycling. Do not deliberately cool a sling, a thin animal, a recent arrival, or a spider approaching a molt. A stable enclosure with water is more important than forcing breeding-season changes on a pet.

💧 Humidity and water

Humidity target: mostly dry surface with a water dish and one slightly moist lower corner. Keep fresh water available in a stable dish sized for the animal. The enclosure should have moisture choices without becoming wet and stale. Both bone-dry conditions and soaked substrate can create problems.

Water one corner deeply enough to reach the lower layer, then allow the surface to dry. Tiny slings need the moist zone checked more often because they dehydrate faster. Condensation and a stale smell indicate that watering or ventilation needs correction; spraying to chase a numerical humidity target is less reliable than reading the substrate.

🌿 Enclosure and decoration

Provide a warm retreat, cooler retreat, water, safe texture for molting, and enough cover that the animal can move without feeling exposed. Juvenile setups should be simple enough to inspect but not bare. Adult enclosures must be built for strength, stable furniture, secure doors or lids, and safe cleaning access. Limit fall height for heavy terrestrial tarantulas. Use deep substrate, keep open space modest, and make sure lids, ventilation panels, and access points close securely.

🪳 Feeding

Feed crickets, roaches, locusts, and occasional worms sized to the abdomen. Use the abdomen and recent molt or feeding history to judge meal size, not appetite alone. Spiderlings eat smaller meals more often; adults usually eat less often and should stay lean rather than swollen. Remove uneaten prey promptly, especially before a molt.

Long fasts are common in this genus. If the abdomen remains rounded, the spider’s posture is normal, and water is available, offer less often rather than digging into the retreat. After a molt, wait until the fangs are fully black—often a week or more in a large adult—before resuming food. Burrowing worms should be contained or disabled so they cannot hide and injure a molting spider.

🥚 Breeding

Breeding is common but slow. Pair only mature, well-conditioned animals and be ready for a long wait before an egg sac; spiderlings need many labeled rearing cups. Breeding should use healthy mature animals with known identity and lawful origin. Keep dates, pairings, offspring numbers, and transfer records, and do not produce more young than can be housed and placed responsibly.

🩺 Common problems

Common problems include dehydration, bad molts, overheating, mites, fall injuries, refusal to feed with visible weight loss, and stress from exposure or poor security. Warning signs include a shriveled abdomen, leaking injury, failed molt, swollen joints, twisting posture, sudden lethargy, or repeated frantic escape attempts. Consult an exotic-animal veterinarian for severe weakness, injury, swelling, failed molt, or prolonged refusal to feed with decline in body condition.

📌 Conclusion

Grammostola pulchra needs adult-sized planning from the start, not only interest in the juvenile stage. Secure housing, measured conditions, appropriate feeding, and basic records make long-term care predictable.

📚 Sources and further reading

• GBIF species backbone: Grammostola pulchra
• World Spider Catalog: Grammostola pulchra
• Pittella et al. 2023 redescription and distribution records
• The Tarantula Collective: Grammostola pulchra care
• Tom’s Big Spiders: husbandry notes by species
• CITES Appendices, checked April 2026
• EU wildlife-trade regulations, checked April 2026