Mexican Red Knee Tarantula Care Guide
Ask most people to picture a tarantula and, whether they know it or not, they're picturing this one. The Mexican red knee tarantula is the species that's been on nature documentaries, in movies, and on the cover of more field guides than any other — and it earned that spot honestly.
What Is a Mexican Red Knee Tarantula?
The Mexican Red Knee, or Brachypelma hamorii, is a terrestrial tarantula from western Mexico and one of the most iconic and instantly recognizable species in the entire hobby, named for the warm reddish-orange coloring at the leg joints set against a dark body. It's also one of the most beginner-friendly animals we carry — calm, predictable, and built to be a genuine lifetime pet rather than a phase. See what's currently in stock here — this is a perennial favorite and doesn't sit in stock long.
Why Hobbyists Keep This as Their Forever Tarantula
- The classic look. That red-knee coloring is the reason most people got into the hobby in the first place — it's the tarantula that's been photographed and filmed more than any other.
- Exceptionally calm temperament. This is one of the steadiest species available anywhere, which is a huge part of why it's the standard beginner recommendation worldwide.
- A genuine multi-decade pet. Females are known for being remarkably long-lived even by tarantula standards. This is an animal you plan around, not just buy due to its lifespan.
- Slow, deliberate growth. Each size stage lasts a long time, so you're never rushing to rehouse.
Mexican Red Knee Size and Growth
Spiderlings hatch out around 0.5 inches and grow into adults in the 5 to 6 inch range. Growth is slow — expect several years to reach full size — which means fewer rehousings and more time enjoying each stage rather than managing constant upgrades.
Enclosure & Housing Setup
As a terrestrial species, this one needs floor space more than height. A spiderling (0.5–1 inch) is comfortable in a small enclosure with at least 1.5 inches of substrate to burrow into — our own Square Invertebrate Enclosure (4.5" x 4.5" x 3", $8) is a budget option we use in-house for growouts up to about 2.5 inches. Juveniles in the 2–3 inch range do well in roughly 8x8x6 inches, and adults (4–6 inches, with this species topping out at the larger end alongside the Brazilian Black) are comfortable in a 12x12x8 inch enclosure with 3–4 inches of substrate for occasional burrowing and a shallow water dish always available.
This species comes from a drier, semi-arid part of western Mexico, so keep the substrate on the drier side with only light misting, and avoid a constantly damp setup.
Feeding
Spiderlings take pinhead to 1/8 inch crickets roughly every 5–7 days. Juveniles move up to 1/4–1/2 inch prey on the same schedule, and adults take appropriately sized crickets or roaches about once a week, tapering off as they reach full size, in step with that slow, steady growth rate. Don't be alarmed if an adult skips a week without eating — that's normal for this species — but we still recommend offering food weekly just in case. As a terrestrial species, it'll also take mealworms; we default to crickets since that's what we feed in-house, but roaches, mealworms, or any other appropriately sized feeder all work. Browse our feeder insects for crickets, roaches, worms, and more.
Is the Mexican Red Knee Good for Beginners?
Yes — about as strongly as any species in the hobby. Calm, hardy, simple terrestrial care, and a growth rate slow enough that nothing about ownership feels rushed. If you want the single most classic tarantula-keeping experience there is, this is it.
Tips When Buying a Mexican Red Knee for Sale
Confirm captive-bred origin (this species has real conservation weight behind sourcing it responsibly) and double check the exact size band against the listing photo. This 1.5–2" juvenile is in stock now at $135 if you want a bit of a head start past hatchling size.
Frequently Asked Questions
How big does a Mexican red knee tarantula get?
Adults reach 5 to 6 inches in diagonal leg span.
Is the Mexican red knee tarantula good for beginners?
Yes — it's one of the calmest, most hardy species in the hobby and a longstanding standard beginner recommendation.
How long do Mexican red knee tarantulas live?
This species is known for being exceptionally long-lived, especially females — one of the reasons it's treated as a lifetime pet rather than a short-term hobby animal. (Note: exact female/male lifespan figures aren't confirmed yet — send them over and I'll drop them in here and in the intro/bullets.)
How fast does a Mexican red knee tarantula grow?
Growth is slow, taking several years to reach full adult size — which means long-lasting enclosures and fewer rehousings along the way.
What does a Mexican red knee tarantula eat?
Appropriately sized crickets or roaches, scaled to the animal, offered roughly once a week and tapering as it reaches full size.
What Keepers Are Saying
Mexican red knee buyers rate this species 4.6 out of 5 across 10 verified reviews:
"I couldn't be more satisfied with my purchase. The Brachypelma hamorii has amazing coloring, is healthy and active." — Elizabeth F., verified buyer
"Wonderful delivery and updates etc, spot on for size and description. Definitely will order again!" — Brian Q., verified buyer
"This little one is growing quite nicely. I'm starting to see some color adding to its translucency. This little one is so chill and loves to dig. I'm having a lot of fun owning it." — Sarah C., verified buyer
A Few Ways to Grow the Collection
If the classic Brachypelma look is what you're after, the Brazilian Black makes a striking contrast — same easygoing terrestrial care, opposite end of the color spectrum. (Cross-link this to the live Brazilian Black guide URL once it's published.) This spiderling at $45 is the most budget-friendly way to start with this species from hatch size.
Reviewed and written by William West, founder of Exotics Unlimited and keeper of 180+ tarantula species for over 20 years.
