Mexican Redknee Tarantula
Brachypelma hamorii
Theraphosidae (Tarantulas), Order Araneae
Physical Description
Robust, heavy-set body covered in dense setae (hairs) with a distinct oval abdomen and a hard carapace. Displays clear sexual dimorphism only upon maturity, with adult males developing tibial hooks on their front legs and slightly different leg proportions.
Size Estimate
Body length ranges from 5 to 7 cm (2 to 2.7 inches) with a leg span of up to 13 to 15 cm (5 to 6 inches).
Coloration & Markings
Dark blackish-brown body and legs with striking, contrasting bright orange-red or pinkish bands on the patella segments of each leg, giving them their characteristic 'redknee' appearance.
Web Type
Does not build traditional prey-capture webs. Instead, they line their ground burrows with silk for stability and structural integrity.
Eye Arrangement
Eight small eyes clustered closely together on a raised tubercle (ocular prominence) at the front-center of the carapace.
Leg Characteristics
Thick, powerful legs covered in urticating hairs, specialized claw tufts for gripping surfaces, and distinct bright red-orange banding on the knee joints.
Venom & Safety Information
Venom Information
Mild neurotoxic venom delivered via large chelicerae (fangs). While potent enough to subdue invertebrate prey, it is generally considered low in toxicity to humans, comparable to a bee or wasp sting.
Medical Significance
Low medical significance. Bites are extremely rare due to docile temperament; mechanical puncture and local pain are the primary concerns, though urticating hairs can cause severe skin and eye irritation.
Safety Recommendations
Handle gently and infrequently to avoid stressing the spider. Avoid touching the abdomen to prevent contact with urticating hairs, and wash hands thoroughly after handling enclosure decor.
Habitat & Behavior
Habitat & Range
Native to the scrub forests, dry shrublands, and deserts of southwestern Mexico, specifically along the Pacific coast in Colima, Jalisco, and Michoacán.
Behavior & Temperament
Generally docile, slow-moving, and calm, making them popular pets. When threatened, they typically retreat to their burrow or kick urticating hairs from their abdomen.
Diet & Prey
Carnivorous ambush predator feeding primarily on large insects, beetles, cockroaches, and occasionally small vertebrates like lizards or mice.
Seasonal Activity
Active year-round in captivity, though wild populations experience reduced activity during cooler or drier months, with mating season typically occurring at the beginning of the rainy season.
Description
A magnificent and gentle giant of the arachnid world, the Mexican Redknee Tarantula is celebrated for its striking coloration, remarkable longevity, and calm disposition. As a terrestrial burrower, it spends much of its time in subterranean retreats, emerging primarily at night to hunt. Its striking orange leg bands and velvety dark body make it one of the most recognizable and iconic tarantula species.
Key Features
Distinctive bright orange-red knee bands contrasting against dark black legs and body, heavy-set hairy physique, and burrow-dwelling terrestrial habits.
Similar Species
Brachypelma smithi (Mexican Redleg), which has more reddish-brown coloration rather than bright orange-red knees, and other Central American terrestrial tarantulas.
Life Cycle
Females lay up to several hundred eggs in a tightly woven silk egg sac. Spiderlings hatch after several weeks and disperse. Molting occurs frequently during growth phases. Females can live for 20 to 30 years, while males typically live 5 to 10 years after reaching maturity.
Ecological Importance
Acts as an apex invertebrate predator in its native ecosystem, helping to regulate populations of large insects and small vertebrates while serving as prey for larger mammals and reptiles.
Conservation Status
Near Threatened globally, protected by international trade agreements and local conservation laws in Mexico.
Interesting Facts
Due to their docile nature and striking appearance, they 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
Use natural or diffused lighting to highlight the vibrant orange knee bands without startling the spider with harsh flashes. Shoot from a low angle at a safe distance with a macro lens to capture fine setae and eye arrangements.
User Notes
My aunts pet
Identified: 2026-07-30T15:42:24.879305