Brachypelma baumgarteni — Fact Sheet

Brachypelma baumgarteni · Brachypelma baumgarteni

Full care guide and sources

📋 At a glance

🏠 Enclosure

An adult enclosure around 35 x 30 x 25 cm provides useful floor area without a dangerous fall. Pack 10-15 cm of pesticide-free topsoil/coco fiber mix so it holds a shallow burrow. Leave no more than about one body length between the substrate and lid. Heavy terrestrial tarantulas can rupture the abdomen in a short fall.

🪨 Substrate and furnishings

Provide a cork-bark starter hide partly buried at one end, leaf litter and a stable water dish. Ventilation on opposing sides is better than a few holes only in the lid. Avoid mesh lids that can trap claws, sharp stone, loose gravel, calcium sand, fertilizers and waterlogged sphagnum. Decorations must not collapse if the spider digs beneath them.

During premolt the spider may refuse food, darken, web over the entrance or close the retreat. Remove live prey and leave it undisturbed. Never dig it out to “check.” Wait until the fangs are fully black and the body has hardened—often 7-10 days for a large adult, less for small slings—before offering food.

💡 Lighting

No UVB or basking lamp is required. Ordinary indirect room light on a 10-12-hour day-night cycle is adequate. Direct sun can overheat a small enclosure within minutes. A low-output plant light may be used above a planted display only if a thermometer confirms that it does not warm or desiccate the spider’s retreat.

🌡️ Temperature

• Daytime air: 20-25 °C
• Cool zone: 18-21 °C
• Night: 18-21 °C

💧 Humidity and water

Keep a clean shallow water dish available at all sizes; use a tiny dish or water droplets on webbing for the smallest slings without flooding them. For juveniles and adults, let most of the surface dry, then overflow the dish lightly or moisten one lower corner. The lower substrate may retain some moisture while the hide entrance remains breathable.

Do not chase a humidity number by spraying the whole enclosure. Condensation, sour substrate, persistent wetness and fungus gnats indicate excessive moisture or inadequate air exchange. A shriveled abdomen, weakness or prolonged hovering over the dish can indicate dehydration and requires an immediate check of water and temperature.

🪳 Feeding

Offer captive-cultured roaches, crickets or locusts no larger than the spider’s abdomen; large adults can take one substantial item rather than several. Feed slings one or two small or pre-killed prey portions every 4-7 days, juveniles about every 7-10 days, and adults every 10-21 days. These are starting points, not quotas.

Use abdomen condition and molt stage to adjust. A very swollen abdomen increases rupture risk, so lengthen the interval. Remove uneaten prey within 24 hours and immediately when premolt is suspected. Mealworms and superworms can burrow; crush the head or use a dish. Tarantulas obtain minerals from whole prey and do not need calcium or vitamin powder.

☠️ Safety

A bite from Brachypelma baumgarteni 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

• Falls and abdominal rupture: prevent excess headroom and hard decor. A leaking abdominal wound is an emergency; minimize movement and contact an exotics veterinarian.
• Urticating hairs: reduce disturbance and never brush shed skins or dry substrate near the face.
• Stale wet substrate: persistent saturation encourages mold, mites and respiratory stress. Improve cross-ventilation and replace foul substrate without drying the entire lower layer abruptly.
• Dehydration or overheating: verify water, measured temperature and ventilation before assuming disease.
• Molt disturbance: prey can injure a soft spider. Remove it, and do not pull retained exuviae from the animal.
• Overfeeding: an oversized abdomen is not a sign of superior care; reduce meal size and frequency.