Mexican Red Knee (Brachypelma Hamorii)

The Mexican Red Knee (Brachypelma hamorii) — an iconic and much-loved tarantula in the hobby. It's often the "poster spider" when people think of tarantulas, thanks to its classic look and calm nature.

Here’s a detailed look:

Quick Facts

• Common Name: Mexican Red Knee

• Scientific Name: Brachypelma hamorii
  (formerly confused with B. smithi — they look very similar!)

• Origin: Pacific coast of Mexico

• Size: About 5.5–6 inches (14–15 cm) leg span

• Lifespan:

  • Females: Up to 30 years

  • Males: Around 5–7 years

• Temperament: Very calm, shy, and slow-moving — great for beginners

• Coloration: Jet black body with bright orange-red “knees” and a tan carapace

Housing

• Enclosure Type: Terrestrial setup, more floor space than height

• Substrate: 3–5 inches of coco fiber, topsoil, or a mix

• Humidity: Around 60–70%

• Temperature: 72–78°F (22–25°C)

• Enclosure Decor: Hide, water dish, optional fake plants, cork bark

Feeding

• Diet: Crickets, mealworms, dubia roaches

• Feeding Schedule:

  • Slings: 2–3 times per week

  • Juveniles: Once a week

  • Adults: Every 10–14 days

Behavior Notes

• Docile but may flick urticating hairs (mildly irritating to skin/eyes)

• Rarely bites and usually very tolerant of gentle interaction (though handling is always a personal decision and should be minimal)