Grammostola pulchripes
Chaco Golden Knee Tarantula: Advanced Care Guide
Keeper Snapshot: A big, steady beginner classic with a calm reputation, good size, and simple terrestrial care. Hardy, slow-to-moderate growing, and better treated as a look-don't-drop display animal.
Group: Industry StaplesDifficulty: Spice 2: BeginnerSetup: Dry-to-moderate terrestrial tarantulaHandling: Not recommended; usually calm but still fragile
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 | 70-80°F |
|---|---|
| Humidity | Low-Moderate ambient (45-60%), steadily ventilated; dry substrate, dish with occasional overflow |
| Setup Type | Dry-to-moderate terrestrial tarantula |
| Substrate | Dry soil/coco mix, 4-6 in, with a hide and water dish |
| Feeding | Juveniles weekly; adults every 2-3 weeks or by abdomen condition |
| Care Difficulty | Spice 2: Beginner |
| Handling | Not recommended; usually calm but still fragile |
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
- secure sling cup or Baby Buddy
- Burrow Buddy for juvenile grow-out
- large low adult enclosure with plenty of floor space
Warnings First
- Large-bodied terrestrial spider: falls can be fatal
- Can fast for weeks or months without issue
- Urticating hairs still matter even when the spider acts calm
- Forgiving on most things, but a low enclosure vents poorly at floor level. Put vents low on two opposite walls so the overflow pocket dries back instead of spreading.
Simple Care
- Keep it simple: hide, water dish, dry substrate, and floor space.
- Vents low on two opposite walls so air crosses the floor of a deliberately low enclosure.
- Water dish with pebbles in it so slings cannot drown.
- Do not overreact to fasting if the abdomen looks healthy.
- Avoid tall climbing decor and rough handling.
Advanced Keeper Notes
Enclosure & Microclimate
- This species is forgiving, but it still benefits from a stable hide and a low enclosure layout.
- Let most of the substrate stay dry. A water dish and occasional overflow gives a safer moisture gradient than regular misting.
- Substrate depth lets juveniles dig and adults rearrange without creating dangerous climbing height.
- The overflow-instead-of-misting approach is right, and it depends on airflow at floor level to work. Because the enclosure is kept low for fall safety, lid vents mostly exchange the band of air above the spider. Put vents on two opposite walls at or just above the substrate so air crosses the floor and dries the overflow pocket back over several days. Without that the pocket spreads and you lose the gradient you were building.
- On a dry-leaning species more airflow is always better. Ambient sits around 45 to 60% by itself and drifting lower is harmless, because a pulchripes drinks from the dish rather than the air.
- Judge by hand rather than by gauge. The overflow area should hold shape when squeezed with no free water and dry back within about a week; everything else reads dry.
- Keep the dish full and put pebbles or coarse grit in it so the waterline sits below the rim. This is a commonly-recommended beginner species bought at sling size, and an adult-scaled dish in a sling enclosure is a preventable loss.
- Put the overflow under the hide rather than across the floor. A humid pocket where the spider shelters is worth more than a damp surface, and the rest of the enclosure keeps drying and re-airing.
Feeding, Growth & Maintenance
- Feed young spiders weekly and adults every few weeks. A healthy adult can refuse food for long stretches, especially around premolt or seasonal changes.
- Molting: remove prey as soon as fasting starts, do not disturb the spider, and wait 5-10 days after a molt before offering food.
- Spot-clean prey remains and keep the water dish clean. Stable conditions beat constant enclosure resets.
Possible Origin / Range
- Likely native range: Grassland, scrub, and Chaco-region habitats of Paraguay, Argentina, and nearby South America.
- Habitat translation: Low, dry-to-moderate terrestrial setup with a water dish, hide, and stable temperature rather than high humidity.
Advanced Keeper Details
- Adult females can exceed 7 in DLS and live many years; males mature sooner and become roaming, restless adults.
- Grammostola species often fast. Judge by body condition and molt timing, not the calendar.
- A calm reputation makes this species popular for education, but repeated handling creates unnecessary fall and hair exposure risk.