Chaco Golden Knee (Grammostola pulchripes)
Last updated: May 13, 2026
This is not a care guide. If you are interested in keeping this species, please research its husbandry thoroughly before purchasing. Tom's Big Spiders has species-specific husbandry notes that are a solid place to start.
Grammostola pulchripes, the Chaco Golden Knee, is one of the most popular tarantulas in the hobby, and it has earned that reputation honestly. It is large, beautifully marked, calm, hardy, and long-lived. If you want a tarantula that will impress people who do not know anything about the hobby, a full-grown female Chaco golden knee will do it every time.
The species is native to the Gran Chaco region of Argentina and Paraguay, a dry lowland habitat. Females can reach 6 to 7.5 inches in legspan, making it one of the larger species widely available in the hobby. The legs are dark with vivid golden-yellow banding at the joints, and the overall coloring has a warm, dusty quality that photographs beautifully.
Slow Growth
The most important thing to know about G. pulchripes before you buy one is that it grows slowly. Very slowly. A spiderling kept in ideal conditions might take 8 to 10 years or more to reach full adult size. This is not a problem if you go in knowing it, but it surprises people who expect tarantulas to grow quickly.
If you want a large spider relatively soon, buying a young adult or sub-adult female is more practical than starting from a sling. The price difference is real but so is the wait. Slings are genuinely rewarding to raise and the slow growth means each molt is an event, but it requires patience that not everyone has.
The upside of the slow growth is that females are extraordinarily long-lived. Lifespans of 20 to 25 years are documented, and possibly longer. A Chaco golden knee you buy today could still be with you in the 2040s.
Is This a Good Fit for You?
The Chaco golden knee is one of the best tarantulas you can buy if you want something large and striking that does not require you to be constantly on guard during maintenance. It is calm, rarely shows any defensive behavior, and is very tolerant of keeper errors. It is a genuine beginner species, not a beginner species by default because there is nothing else to recommend.
The feeding behavior tends to be more consistent than G. rosea, though it is still a Grammostola and can go off feed during premolt or for other reasons that have nothing to do with a problem. It accepts prey readily when it is in feeding mode and has a good appetite for its size.
If the long lifespan and slow growth do not bother you, and you want a large, beautiful, calm display animal, this species belongs near the top of any list you are making.
Current Prices
Grammostola pulchripes (Chaco Golden Knee) currently sells for between $17.00 and $400.00 in the United States, with a median asking price of $41.00 across 26 in-stock listings from 17 vendors. Price depends mostly on size and sex: slings sit at the low end, mature females at the high end.
| Cheapest listing right now | $17.00 |
|---|---|
| Typical price (median) | $41.00 |
| Most expensive listing | $400.00 |
| Listings in stock | 26 |
| Vendors carrying it | 17 |
In stock at: ArachnoEden, Big Z's, Buddha Bugs, FangzTV, Fear Not Tarantulas, Great Basin Serpentarium, Hardcore Arachnids, Jamie's Tarantulas, Josh's Frogs, Micro Wilderness, Old Pueblo Exotics, One Love Tarantulas, Pacific Northwest Arachnids, Spider Shoppe, The Spider Room, Vexotic Me, Wonderland Exotics. Compare every Grammostola pulchripes listing by price.
Prices as of October 14, 2026. Live figures in the table below.
FAQs
How big does the Chaco Golden Knee get?
Females typically reach 6 to 7.5 inches in legspan, making them one of the larger new world species available. Males are smaller and shorter-lived, as is typical across the family.
Is Grammostola pulchripes good for beginners?
Yes, genuinely. Its temperament is excellent, it is hardy, and it is forgiving of the kinds of mistakes new keepers make. The main thing to prepare for is the slow growth rate, which surprises people who have not kept one before.
How long does a Chaco Golden Knee live?
Females can live 20 years or more. This is one of the longest-lived tarantula species commonly available in the hobby, and it is worth thinking about as a real long-term commitment before you buy.
How often does Grammostola pulchripes eat?
Adult females may only eat every few weeks, and extended fasting periods are normal. As with other Grammostola species, this is not a cause for alarm on its own. As long as the spider looks healthy and has access to water, it is almost certainly fine.