Theraphosa blondi
Goliath Birdeater Tarantula: Advanced Care Guide
Keeper Snapshot: A giant terrestrial, fossorial tarantula for advanced keepers. Needs space and humidity: 9-11 inches across (body to about 5 in), among the largest spiders on earth.
Group: TarantulasDifficulty: Spice 4: AdvancedSetup: Large humid terrestrial, fossorialHandling: No handling, heavy urticating hairs
Use This Guide Safely
- Confirm the exact animal. Match this guide to the species, locality, size, and life stage on your label. If the ID is uncertain, use the more conservative part of the range and ask before changing the setup.
- Change one thing at a time. Treat temperature and humidity as target zones, then watch posture, burrowing, drinking, feeding, and molt behavior before making another adjustment.
- Respect the handling boundary. If the guide says no handling, fast, defensive, or medically significant, plan transfers with catch cups, locked lids, and no bare hands. For serious bites, stings, or symptoms, seek emergency medical care.
Quick Snapshot
| Temperature | 75-82°F |
|---|---|
| Humidity | 75-85%, cross ventilation, damp below, large dish |
| Setup Type | Large humid terrestrial, fossorial |
| Substrate | Deep moist soil/coco mix |
| Feeding | Large prey weekly or as body condition requires |
| Care Difficulty | Spice 4: Advanced |
| Handling | No handling, heavy urticating hairs |
Humidity zones: Very Low under 30% - Low 30-60% - Low-Moderate 40-70% - Moderate 60-80% - Moderate-High 70-85% - High 80%+ - Very High 90%+
Enclosure Format / Size Class
- Compact secure enclosure for tiny slings, briefly.
- Horizontal humid burrow setup for juveniles.
- Large deep-substrate humid burrow build for the adult.
Warnings First
- One of the largest spiders on earth; needs serious space.
- Needs consistently high humidity; don't let the substrate dry out.
- Heavy urticating hairs, among the worst in the hobby; keep them away from eyes and airway.
- High humidity plus a still enclosure rots fast; cross-ventilate on two opposite walls to keep it stable, not stagnant.
Simple Care
- Do not let the substrate dry out.
- Cross-ventilate low on two opposite walls; airflow is what makes high humidity safe here.
- Give deep substrate and a large water dish with pebbles so slings cannot drown.
- Plan for a large adult enclosure ahead of time: roughly a 20-gallon long or 18×12×12 in or bigger.
- Wear eye protection and a dust mask during maintenance; the urticating-hair load is heavy.
Advanced Keeper Notes
Enclosure & Microclimate
- Needs stable humidity without stagnant rot: deep moisture-holding substrate, ventilation, and a large water dish.
- May burrow, bulldoze, and stress easily from exposure; give cork, cover, and room to retreat.
- Vent low on two opposite walls so air moves through the deep damp layer instead of sitting still in the far corners.
- Read the substrate by hand: the bottom third should hold shape when squeezed, the top drier. Never hold humidity by closing off the vents.
- Mist under the cork and into the burrow entrance, not the whole surface, so the shelter stays humid while the open floor can dry.
Feeding, Growth & Maintenance
- Match feeding to body condition; even large animals need fasting respected during premolt.
- Slings 2x weekly (fast growers); juveniles weekly; adult females large prey every 1-2 weeks or as body condition needs. Keep prey smaller than the abdomen.
- Premolt: sluggish, hides, stops eating for days to weeks, even at this size. Pull uneaten feeders, leave it alone, wait 5-10 days after the molt before feeding again.
- This is not a beginner giant; plan the adult enclosure before you buy.
Possible Origin / Range
- Likely native range: Northern South America: Guyana, Suriname, French Guiana, Brazil, and Venezuela rainforest.
- Habitat translation: Deep moisture-holding substrate, high humidity, and airflow; wet-stale conditions are not acceptable.
Advanced Keeper Details
- Adults need large, stable retreats and floor space; don't design for handling or frequent disturbance.
- Track substrate hydration by lower-layer moisture and ventilation quality, not just surface misting.
- Fast-growing as slings. Type-III urticating hairs are among the worst in the hobby; gloves, eye protection, and a dust mask are standard for maintenance.