Chaco Golden Knee Tarantula
Grammostola pulchripes
1. Deep Soil & Low-Ceiling Safety Setup
2. Two Great Ways to Set Up Your Habitat
Sizing the Tank: Slings vs. Adults
Putting a fingernail-sized baby ('sling') in a giant 10-gallon tank makes it impossible for them to find dinner:
Option A: Spiderlings ('Slings' Under 1.5")
Keep in a vented sling vial or micro acrylic cube (about 3–4× their legspan wide) with 2" of soil, a piece of moss, and a clean tattoo-ink cap or bottlecap for water.
Option B: Juveniles & Adults (2" to 7"+)
A 5- to 10-gallon glass or acrylic enclosure filled halfway up with 4–6" of packed reptile/invertebrate soil and a curved cork bark starter cave.
Ground Burrowers vs. Tree Climbers
Make sure your setup matches where your spider actually lives in nature:
Option A: Ground / Burrowing (Curly Hair, Red Knee, Arizona Blonde)
Wide floor space, deep 4–6" soil for bulldozing, and low ceiling clearance so a clumsy climber can never take a big fall.
Option B: Tree-Dwelling (Pinktoes, Versicolor, Jumping Spiders)
Tall enclosure with lots of side-wall air holes (cross-ventilation!) and tall cork bark reaching near the ceiling.
To Handle or Not to Handle?
Real talk from our invert team: tarantulas don't get cuddly from being held—handling is mostly for us:
Option A: Hands-Off Display Pet (What We Recommend)
Safest for the spider! Use a soft paintbrush to gently tap their back legs and guide them into a catch-cup whenever you need to clean.
Option B: Sit Flat on the Floor (Calm Docile Species Only)
If you do let a calm Curly Hair or Red Knee walk on your open palm, sit on the floor or bed so a sudden bolt can never mean a fatal drop to the floor.
3. Feeding by 'Booty Size' & The Molting Rule
Best Bugs & Big No-Nos:
Top pick—nutritious and won't bite a spider!
Great hunters—MUST remove uneaten crickets after 24h!
Crush worm heads so they can't hide underground
Wild bugs carry lawn sprays & parasites that kill spiders
4. Four Keys to a Happy, Thriving Chaco Golden Knee Tarantula
Watch Out for Wire Mesh
Heavy ground tarantulas have two tiny hooks on each foot that can get snagged in cheap woven window-screen lids. Acrylic lids with drilled air holes are way safer!
Overflow the Water Dish
Tarantulas hate being sprayed in the face with a mister! Instead, just overfill their water dish a little bit once a week so one corner of the soil stays damp.
Itchy Belly Hairs
New World tarantulas kick itchy 'urticating hairs' off their butt when annoyed. Don't rub your eyes after working in the tank, and wash your hands with soap!
Upside-Down vs. Death Curl
Flat on their back = happy molting! Right-side-up with all 8 legs curled tightly *underneath* the belly = dehydrated ('death curl')—put their mouthparts right into a shallow puddle of water!
Bring-Home Shopping Checklist
Tap items to check them off on your phone while you shop at Critter Cabana.
Enclosure & Deep Soil
Water Dish & Safe Tools
Live Feeder Bugs
Complete Reference Notes & Oregon Keeping Guide
Species: Grammostola pulchripes | Difficulty: 1/5 — Beginner | Hardiness: 5/5 — Bulletproof
Critter Cabana & Gresham Pet Supply — Keeping Your Pet Healthy & Thriving
At a Glance
| Common Name | Chaco Golden Knee | |
| Species | Grammostola pulchripes | |
| Origin | Grasslands and scrublands of Argentina and Paraguay | |
| Adult Size | 7–8.5 inch leg span (Very large and heavy-bodied) | |
| Lifespan | Females: 20+ years | Males: 4–5 years |
| Diet Type | Insectivore (Crickets, Roaches, Mealworms) | |
| Activity | Nocturnal / Crepuscular | |
| Temperament | Incredibly docile, slow-moving, and calm. Rarely defensive. | |
| Handleability | Very handleable compared to most tarantulas, though handling still carries risks to the spider. | |
| Venom | Medically insignificant (Comparable to a bee sting, unless allergic) | |
| Urticating Hairs | Yes (Can flick hairs from abdomen if stressed, though they rarely do) | |
| Difficulty | 1/5 — Beginner (Often considered the #1 best beginner tarantula) | |
| Hardiness | 5/5 — Bulletproof (Extremely forgiving of beginner mistakes) |
Why We Love Them: The Chaco Golden Knee is the ultimate beginner tarantula, easily rivaling or beating the famous Rose Hair. They are incredibly docile, have a massive and impressive adult size, and feature striking yellow-gold stripes on their knees (patellas). Because they are so calm, they are one of the few species that are relatively safe to handle.
Safety Information
Venom/Defense: Their venom is medically insignificant. Like all New World tarantulas, their primary defense is kicking urticating hairs. However, the Chaco Golden Knee is famous for almost never kicking hairs unless severely provoked.
First Aid: If you get hairs on your skin, use tape to pull them out, then wash with warm water. If bitten, wash with soap and water.
Handling Precautions: The danger is to the spider, not you. They are very heavy-bodied. A fall from even a few feet to a hard floor will rupture their abdomen and kill them instantly. If you must handle them, sit flat on the floor and let them walk from hand to hand just inches above the carpet.
Housing & Enclosure
Enclosure Type & Size
- Type: Terrestrial / Opportunistic Burrower.
- Minimum: A standard 10-gallon glass aquarium.
- The Height Warning (CRITICAL): Because they are heavy-bodied, you must minimize the vertical height of the enclosure. If a Chaco climbs to the top of a tall tank and falls, it will die. Ensure the distance from the top of the substrate to the lid is no more than 1.5x the spider's leg span.
- Lids: Avoid mesh screen lids if possible, as their claws can get stuck in the wire and cause them to lose a leg. If using a screen lid, ensure there is deep substrate so they can't climb high enough to hang from it.
Substrate
- Recommended: Coconut fiber (Eco Earth), peat moss, or organic topsoil.
- Depth: Provide 4 to 6 inches of substrate. While they often sit out in the open, they do enjoy burrowing, and the deep soil prevents dangerous falls.
- Avoid: ReptiBark, wood chips, or sand.
Décor & Enrichment
- Hides: Provide a large cork bark flat or half-log hide. They will often dig out the soil underneath it to create a den.
- Water Dish: Provide a large, shallow water dish. Keep it filled at all times.
Temperature
| Zone | Temperature |
|---|---|
| Ambient | 70–80°F (21–27°C) |
- Heating: Room temperature is perfect. Never use a heat pad underneath the tank, as burrowing tarantulas will dig down to escape the heat and cook themselves.
Humidity
- Target Range: 60–70% (Medium).
- How to Maintain: Keep most of the substrate dry, but overflow the water dish once a week to keep that specific corner of the tank damp. This provides a moisture gradient, allowing the tarantula to choose whether it wants to be dry or slightly humid.
Diet & Nutrition
Primary Diet
- Live crickets, dubia roaches, or mealworms. They are excellent eaters.
Feeding Schedule
| Life Stage | Frequency | Prey Size |
|---|---|---|
| Spiderling (Sling) | Every 4–5 days | Pinhead crickets or small mealworms |
| Juvenile | Every 7 days | Medium crickets |
| Adult | Every 10–14 days | 3-4 Large crickets or 1-2 Large Roaches |
Pre-Molt Fasting
- Chaco Golden Knees are incredibly slow growers. They may enter pre-molt (refusing food, turning dark/shiny, hiding) for months before actually molting. This is completely normal. Do not panic if they refuse food for extended periods.
Molting
Molting is the process of shedding the exoskeleton to grow. It is the most vulnerable and critical period in a tarantula's life.
During the Molt
- DO NOT disturb or handle the spider. It will flip on its back to molt. It is not dead. Do not flip it over.
- Remove any live crickets from the enclosure immediately. A live cricket will eat a molting tarantula alive.
Post-Molt Care
- Wait at least 7–14 days before offering food. Because Chacos are so large, it takes a long time for their new fangs to harden. If they bite a cricket too soon, their fangs will break off, and they will starve to death.
What We Stock & Use in Our Stores
These are products we carry and recommend for this species. Ask any associate for help finding them in-store.
| Category | Product | Notes |
|---|---|---|
| Enclosure | Aqueon 10-Gallon Glass Aquarium | Fill halfway with soil to prevent climbing/falling injuries |
| Substrate | Zoo Med Eco Earth (Coco Fiber) | Excellent for burrowing. Minimum 4-6 inches deep! |
| Hides | Zoo Med Natural Cork Bark (Curved) | The perfect starting roof for their burrow |
| Water Dish | Exo Terra Shallow Water Dish (Medium) | Overflow this once a week to provide a damp corner |
| Feeder Insects | Live Crickets or Dubia Roaches | Size appropriately to the spider's abdomen |
Care sheet compiled by Critter Cabana & Gresham Pet Supply. For questions, ask any livestock specialist in-store.
Last updated: 2026-08-04
How We Keep Them at Critter Cabana & Gresham Pet Supply
- Oregon Winter Furnace Air vs. Molting Humidity: When Pacific Northwest furnaces kick on from October through April, indoor room humidity drops fast and dries out small enclosures from the top down. Rather than misting the spider or invert directly (which stresses terrestrial species and invites stagnant mold), we keep Chaco Golden Knee Tarantula at
60-70% (Medium)by using a deep moisture-retaining substrate bed (ReptiSoil + Coco Fiber + Sphagnum Moss), overflowing the water dish slightly into one corner, and maintaining cross-ventilation. - Safe Room Heating in the Willamette Valley: If your house drops below 65°F on winter nights, never stick a heat pad on the bottom of a burrowing invertebrate tank—they dig down to escape heat and will cook themselves. Use a low-wattage side-mounted heat mat on a digital thermostat or warm the room ambiently to
species-appropriate warm zone. - Stocked at Newberg & Gresham: At Critter Cabana (Newberg) and Gresham Pet Supply, we stock acrylic and glass invertebrate enclosures, cork bark flats and tubes, bioactive substrates, flightless fruit flies (D. melanogaster and D. hydei), pinhead to adult crickets, dubia roaches, and live Temperate White Springtail and Isopod cultures.
Common Questions (FAQ)
How do I keep my Chaco Golden Knee Tarantula warm and humid enough during an Oregon winter?
Target species-appropriate warm zone and 60-70% (Medium). When Oregon winter furnaces dry out the air, use a deep 3–5 inch substrate mix of Zoo Med ReptiSoil and coco fiber, keep a shallow water dish filled, and dampen one corner of the substrate rather than misting the animal directly. Never put a heat mat underneath a burrowing invertebrate enclosure.
What size enclosure does a Chaco Golden Knee Tarantula need?
An adult Chaco Golden Knee Tarantula thrives in 10-gallon tank (low height) with secure ventilation. For terrestrial tarantulas and scorpions, floor space and deep substrate matter most (keep open fall height low so heavy-bodied species cannot rupture their abdomen); for arboreal species, prioritize vertical cork bark tubes and cross-ventilation.
Can I put isopods in a Chaco Golden Knee Tarantula bioactive enclosure?
Around molting tarantulas and scorpions, skip protein-hungry large isopods and stick to Temperate White Springtails (or gentle Dwarf White isopods in humid detritivore setups) so a soft, newly molted animal is never nibbled.
Where can I find Chaco Golden Knee Tarantula, cork bark, and feeder insects in Oregon?
We stock live invertebrates, tarantulas, jumping spiders, cork bark flats and tubes, bioactive substrates, and gut-loaded feeder insects at our two exotic animal stores: Critter Cabana in Newberg (514 E First St, 503-537-2887) and Gresham Pet Supply (2185 NW Burnside Rd, 503-665-7606).
