Bonnetina minax
Mexican Copperhead - complete care guide
Mexican Copperhead
Temperature
21-26 °C
Target ambient range
Humidity
60-70 %
Substrate / enclosure RH
Adult DLS
9-12 cm
Average - varies per individual
Moult interval
Sling 4-8w - Juv 2.7-4.3mo
Adult 13-17mo
Adult cycle = mature females; males never moult again after maturity
About
Described in 2017 from Michoacán, Mexico - "minax" means menacing, for the aposematic copper-red carapace, but the spider is anything but. A glowing copper-bronze carapace over a black abdomen and grey legs with black femora (UK trade often calls it the Mexican Blue Femur). Brachypelma-easy husbandry, slow growth, females 10-15 years. Uncommon in the UK and worth grabbing when captive-bred slings appear.
Husbandry cheat sheet
- Origin
- Mexico (Michoacán)
- Habitat
- Thorny Pacific scrubland
- Temperament
- Docile
- In your collection
- 0
Growth, lifespan & conservation
- Growth rate
- Slow
- Maturity
- ♀ 60mo ♂ 48mo
- Lifespan
- ♀ 15yr ♂ 6yr
- Continent
- North/Central America
- UK availability
- Uncommon
Care Guide
Bonnetina minax
Mexican Copperhead - a complete husbandry sheet. Use as a starting point and adjust to your individual specimen.
What size enclosure does a Mexican Copperhead Tarantula need?
Adults
30 × 25 cm (12 × 10 in) for a mature adult. Floor space matters more than height.
Slings & Juveniles
House spiderlings in small, appropriately sized deli cups or sling enclosures. Upgrade every few moults.
To map exact floor space and substrate safety limits for your setup, use our free interactive tarantula enclosure planner.
What temperature and humidity does a Mexican Copperhead Tarantula need?
Heating
The Mexican Copperheads is comfortable at 21-26 °C. Most UK homes sit in or near this range; heat the room rather than the enclosure if winter drops below 19 °C.
Humidity
60-70 %: dry substrate with a full water dish. Pacific-scrub species - keep it dry-side.
Ventilation
Cross-ventilation is essential - side-vented enclosures, never stagnant.
What substrate is best for a Mexican Copperhead Tarantula?
Recommended Mixes
Depth
5-8 cm
Notes
Keep substrate dry to barely moist - never soaking.
How do you set up a Mexican Copperhead Tarantula enclosure?
Décor
The Hide
A cork bark half-log, leaning slab, or cork tube placed on the substrate.
Water
Always provide a shallow fresh water dish.
Lighting
No special lighting needed. Ambient room light is enough.
How often should you feed a Mexican Copperhead Tarantula?
Good Feeders
Long refusal worrying you? Separate premoult fasting from genuine problems with our "Is my T okay?" checker.
Is my Mexican Copperhead Tarantula dying or moulting?
Pre-moult signs to look for
Refusing food for weeks is normal before a moult - a healthy Mexican Copperhead Tarantula fasting is almost never an emergency in itself. Watch for slowing down and spending more time in the hide, laying a thick moult mat of web on the floor. New World species like this one often show a bald spot on the abdomen that darkens to near-black as the new skin underneath readies - a darkening bald patch is a reliable countdown, not a disease.
On its back is MOULTING, not dying
A Mexican Copperhead Tarantula lying upside down or on its side with legs curled inwards is almost certainly mid-moult. Do not touch it, do not right it, do not mist it - just remove any live prey (crickets can kill a defenceless moulter) and leave the room.
How long between moults?
For this species, expect a moult roughly every 28-56 days for spiderlings, every 80-130 days for juveniles, and every 210-320 days for sub-adults, with adult females moulting around every 12.7 months (up to 17.3 months at the extreme). Males never moult again after their ultimate (mature) moult.
After the moult: fang hardening time
The new exoskeleton stays soft, with fangs that cannot grip, for roughly 8 days in this species. Offer no food and no handling for about 8 days - feeding too early is how fresh moulters get injured. The shed exuvium is also the best sexing tool there is - see our tarantula sexing guide for what to look for.
Genuinely worried about behaviour that is not moulting? Our "Is my T okay?" triage tool walks the danger signs one by one.
What ongoing care does a Mexican Copperhead Tarantula need?
🪞 Moulting
Signs: refuses food, abdomen darkens and goes glossy, becomes sluggish, often heavy webbing or a moult mat. During the moult: do not disturb, remove any live prey, keep water available. Wait until the fangs are black and hard before feeding again. Adult intervals apply to mature FEMALES - a mature male never moults again.
🧹 Cleaning
Daily: check the water dish. Weekly: remove uneaten prey boluses and spot-clean.
✋ Handling
Calm and docile, rarely defensive - still a New World species that can flick hairs; handle rarely if at all.
What are the most common mistakes when keeping Mexican Copperhead Tarantulas?
✓ What They Love
- Fresh water dish at all times
- Cross-ventilation
- Stable room temperature
- A proper hide and a few anchor points
- Dry-side scrubland setup - minimal misting
✕ Common Mistakes
- Soaking-wet substrate
- Daily misting
- Heat mat underneath the enclosure
- Impatience - a slow-growing Mexican species by nature
Keep exploring: related care guides
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Acanthoscurria geniculata
Brazilian Giant White Knee
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Acanthoscurria musculosa
Black Velvet Rump
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Acanthoscurria natalensis
Natal Brown Birdeater
Terrestrial - full guide →
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