Meet the animal
Brachypelma hamorii is distinct from B. smithi, despite older care pages joining the names. Orange-red knees alone do not resolve every traded animal’s identity. Ask for the scientific name and provenance.
Before you choose one
A female can need decades of care and slow growth does not mean a juvenile is already reliably sexed. Keep one observation animal and obtain feeding and moult history. Apparently calm spiders can still fall, bite or release irritating hairs.
Set up its home
The proposed custom layout is 55 × 35 × 30 cm. Confirm actual dimensions and ventilation before ordering. Use deep stable substrate, a fitted retreat and low unprotected fall height. Secure perforated ventilation avoids exposed wire that can snag claws.
Temperature and safe heating
Terrestrial-tarantula guidance supports a stable room in the low-to-mid twenties Celsius as a reviewable starting plan. Measure seasonal extremes. Avoid hot basking spots or unregulated underside mats; any controlled warmth must preserve cooler choices.
Daylight, shade and UV
Use ordinary room daylight, a shaded shelter and darkness overnight, following the guidance used here. No mandatory UVB or exact UVI target is established here. Keep display lighting from adding heat or flooding the retreat.
Water, moisture and airflow
Established adults can have mostly relatively dry exposed substrate, a modest damp area and clean drinking water. Spiderlings need closer checks and a different hydration balance. Never flood a burrow to force viewing or interpret dry care as no water.
Food and nutrition
Offer manageable cultured insects according to abdomen condition, growth and moult stage. Slow-growing adults may need widely spaced meals. Remove uneaten live prey promptly, especially from a closed retreat. Resume after moulting only once the body and fangs have hardened.
Behaviour and handling
Keep singly and avoid routine handling. Preserve shelter and do not scrape material from beneath a pre-moult spider. Irritating hairs can affect eyes and skin; minimise disturbance and wash hands after maintenance.
Health and life stages
Record meals, moults and condition without repeated restraint or weighing. Injuries, persistent weakness or failed moulting need experienced invertebrate-veterinary help. Check water and climate before assuming every refusal is disease. Do not force off old skin or use household pesticides.
Buying and keeping records
Choose documented captive-bred B. hamorii and check current CITES and movement requirements. Reject unsupported claims that hamorii and smithi are interchangeable. Keep exact identification and legal-origin records with the animal.
Your care routine
Prepare low fall clearance, substrate and servicing access before arrival. Check water and security regularly and remove waste and prey remains. Leave identity, last meal and moult-state records for holiday care; daily prey or handling is not a care requirement.
YOUR CHECKLIST
0 of 7 ticked
Mexican red-knee tarantula — Brachypelma hamorii
Care hub: wildformexotics.co.uk/animals/mexican-red-knee/
Ticks are kept only while this page is open. Print or download a copy before leaving. Completing the checklist does not establish that an animal is well or an installation is safe.
Use these reminders alongside the full guide. Adjust feeding and maintenance to your animal’s condition and measured enclosure conditions.
Sources
- Mexican red-knee husbandry (trade-name ambiguity) (Jamie's Tarantulas)
- Brachypelma hamorii UK species listing (The Spider Shop)
- General tarantula care guide (The Spider Shop)
- UK species livestock listing (dated observation, not stock guarantee) (Repxotics)
- Guidance on section 14 of the Wildlife and Countryside Act (GOV.UK / Defra)
- Import of pet invertebrates, amphibians and reptiles: IIN (GOV.UK / APHA and Defra)
- Import or export endangered species: check if you need a CITES permit (GOV.UK / APHA and Defra)
Equipment checklist
Equipment examples for Mexican red-knee tarantula, grouped by care need. Read the checks before choosing. Shop links are Amazon affiliate links. Items without a verified Amazon match have no shop link.
Plan the whole setup: These examples cover only part of the setup. Meet every care need and test the finished enclosure before arrival. Suitable equipment you already own may meet the need; optional tools are labelled.
Check each item for your animal’s size and life stage, safe access, compatible controls and measured conditions. The list does not certify an installation.
Adult enclosure, substrate and shelter
Read the care guidance for this need
Also plan for: Confirm the proposed 55 x 35 x 30 cm build, secure perforated ventilation and substrate capacity before ordering. Keep free fall low and provide a stable retreat. Add the substrate, hides, cover and secure supports described in the care guide. The enclosure alone does not provide them.
Temperature and safe heating
Read the care guidance for this need
Exo Terra Digital Thermometer
Model: PT2472
Records minimum and maximum air temperatures near a shelter your animal uses, to help you check the temperature plan.
Fit check: The remote probe measures air at one location. Keep it away from direct lamp heat, secure it safely and keep the display outside. Use separate probes for warm and cool areas where needed. Minimum/maximum readings help track changes; this device does not measure surfaces or control heating. Use a water-rated thermometer for submerged readings.
Lighting, shade and UV
Read the care guidance for this need
Existing lighting may already provide a suitable day-night cycle. If you need extra lighting, use a switch or timer confirmed as compatible with its exact load, including any UVB ballast.
Water, humidity and ventilation
Read the care guidance for this need
Exo Terra Water Dish Small
Model: PT2801
Provides accessible drinking water for a suitably sized established spider without forcing high enclosure humidity.
Fit check: PT2801 measures 5.5 × 6.5 × 3 cm externally. Check the usable basin, stability, safe water depth and easy entry and exit for your animal. Outside measurements do not establish a soaking fit. Clean and refresh water at least daily and whenever soiled. This is a small drinking dish, not an adult snake, dragon, frog or tortoise basin. Tiny spiderlings may need a smaller receptacle.
Exo Terra Digital Hygrometer
Model: PT2477
Optional air-humidity monitor
Tracks the air humidity cycle near an occupied area.
Fit check: Place the remote humidity sensor inside the enclosure, away from direct heat. The reading describes air at that point, so record its position and check other areas where needed. Inspect the substrate and damp retreats directly, and keep ventilation clear. A humidity reading cannot show whether an animal has drinking water.
Also plan for: Provide the drinking water, damp retreats or safe water area described in the care guide. A sprayer and humidity gauge cannot provide these on their own.
Feeding and nutrition
Read the care guidance for this need
Also plan for: Offer manageable cultured insects according to abdomen condition, growth and moult stage.
Equipment notes: Temperature and safe heating
EQUIPMENT TO CONSIDER
Exo Terra Digital Thermometer
Model PT2472 · Remote air probe and minimum/maximum memory; place away from direct lamp radiation. Check the supplier’s current price and availability, and confirm that the item suits your installation.
Records minimum and maximum air temperatures near a shelter your animal uses, to help you check the temperature plan.
Check before choosing: The remote probe measures air at one location. Keep it away from direct lamp heat, secure it safely and keep the display outside. Use separate probes for warm and cool areas where needed. Minimum/maximum readings help track changes; this device does not measure surfaces or control heating. Use a water-rated thermometer for submerged readings.
Equipment notes: Water, moisture and airflow
EQUIPMENT TO CONSIDER
Exo Terra Water Dish Small
Model PT2801 · Small drinker for appropriately sized animals; not a large soaking basin. Reduce water depth when needed. Check the supplier’s current price and availability, and confirm that the item suits your installation.
Provides accessible drinking water for a suitably sized established spider without forcing high enclosure humidity.
Check before choosing: PT2801 measures 5.5 × 6.5 × 3 cm externally. Check the usable basin, stability, safe water depth and easy entry and exit for your animal. Outside measurements do not establish a soaking fit. Clean and refresh water at least daily and whenever soiled. This is a small drinking dish, not an adult snake, dragon, frog or tortoise basin. Tiny spiderlings may need a smaller receptacle.
EQUIPMENT TO CONSIDER
Exo Terra Digital Hygrometer
Optional air-humidity monitor
Model PT2477 · Remote humidity probe; readings describe air at the probe, not substrate moisture. Check the supplier’s current price and availability, and confirm that the item suits your installation.
Tracks the air humidity cycle near an occupied area.
Check before choosing: Place the remote humidity sensor inside the enclosure, away from direct heat. The reading describes air at that point, so record its position and check other areas where needed. Inspect the substrate and damp retreats directly, and keep ventilation clear. A humidity reading cannot show whether an animal has drinking water.
