Mexican Redknee Tarantula
Brachypelma hamorii
Theraphosidae (Tarantulas), Order Araneae. Key family characteristics include large size, heavy build, dense body hair (setae), and two pairs of book lungs.
Physical Description
A robust, heavy-bodied spider with a rounded abdomen and a distinct cephalothorax. The body is densely covered in fine, velvety setae, featuring contrasting dark black and vibrant orange-red coloration on the joints of the legs.
Size Estimate
Body length ranges from 5 to 7 cm, with a total leg span reaching up to 12 to 15 cm. This specimen appears to be a sub-adult or adult.
Coloration & Markings
Carapace is dark brown to black with a lighter buff or yellowish border. The abdomen is dark and covered in reddish hairs. The legs are primarily black with distinct orange-red banding or patches on the patellae (knee joints).
Web Type
Tarantulas do not build traditional aerial webs to capture prey. Instead, they line their ground burrows or retreats with a dense mat of silk webbing to provide traction and sensory awareness.
Eye Arrangement
Eight small eyes are clustered closely together on a raised tubercle (ocular prominence) at the front-center of the cephalothorax.
Leg Characteristics
Robust, thick legs covered in long sensory hairs and specialized setae used for vibration detection and defense. The leg joints feature bright orange-red coloration.
Venom & Safety Information
Venom Information
Mild neurotoxic and proteolytic venom. Potency relative to humans is very low, typically comparable to a bee or wasp sting, causing localized pain, swelling, and redness.
Medical Significance
Harmless to healthy humans. The bite itself is rare and mechanical, but the primary defense mechanism of kicking urticating hairs can cause skin irritation and respiratory discomfort if inhaled.
Safety Recommendations
Handle gently and infrequently to avoid stressing the spider or provoking defensive hair-kicking. Wash hands thoroughly after handling to avoid transferring urticating hairs to the eyes.
Habitat & Behavior
Habitat & Range
Native to the Pacific coast of Mexico, particularly in the states of Colima, Jalisco, and Michoacán. They inhabit dry scrublands, deciduous forests, and arid environments, living in deep burrows under rocks or roots.
Behavior & Temperament
Generally docile, slow-moving, and placid in temperament. They are nocturnal ambush hunters. When threatened, they typically rely on kicking urticating hairs from their abdomen rather than biting.
Diet & Prey
Carnivorous. Diet consists primarily of large insects, beetles, cockroaches, and occasionally small vertebrates like lizards or mice, caught by ambush and subdued with venom.
Seasonal Activity
Active year-round in captivity, but in the wild, activity peaks during the rainy season when males wander in search of females for mating.
Description
The Mexican Redknee Tarantula is one of the most iconic and recognizable tarantulas in the world. With its striking black and orange-red coloration and gentle demeanor, it is a magnificent representative of the Theraphosidae family, serving as a charismatic ambassador for arachids everywhere.
Key Features
Distinctive orange-red knee bands on black legs, a velvety dark abdomen with reddish hairs, and a buff-bordered carapace, combined with a large, heavy-set tarantula body.
Similar Species
Brachypelma smithi (Mexican Redleg), which has finer reddish markings on the legs rather than distinct knee patches, and other Central American tarantula species.
Life Cycle
Females construct silk egg sacs containing up to several hundred eggs. Spiderlings hatch and disperse after a few weeks. Growth is slow, with multiple molts per year in youth, slowing down in adulthood. Females can live up to 25 to 30 years.
Ecological Importance
Acts as an apex invertebrate predator in its native ecosystem, regulating insect and small vertebrate populations and cycling nutrients through the soil.
Conservation Status
Listed as Near Threatened by the IUCN, primarily due to habitat destruction and historical illegal pet trade collection.
Interesting Facts
Due to their calm nature and striking appearance, Mexican Redknees have been heavily featured in Hollywood films. They are protected under CITES Appendix II due to historical over-collection for the pet trade.
Photography Tips
Photograph in natural light without a harsh flash to capture the rich velvet textures and vibrant orange knee markings. Maintain a safe distance if the spider exhibits defensive posture.
User Notes
Aunts pet
Identified: 2026-07-30T15:43:00.586463