Mexican Golden Red Rump Tarantula, Mexican Gold Rump
Brachypelma albiceps
Theraphosidae (Tarantulas), Order Araneae. Characterized by hairy bodies, two claws on each foot, and downward-pointing fangs (Mygalomorphae).
Physical Description
A medium-to-large terrestrial tarantula. It features a distinctively light tan or golden carapace (cephalothorax) that contrasts sharply with its black abdomen and legs. The abdomen is covered in long, reddish-orange guard hairs. The body is densely covered in fine setae.
Size Estimate
Estimated body length of 2.5 to 3 inches (6-7.5 cm) for a sub-adult/adult. Leg span typically ranges from 5 to 6 inches (13-15 cm) at full maturity.
Coloration & Markings
Unique 'bicolor' appearance. The carapace is a solid, creamy golden-yellow to tan. The chelicerae, legs, and pedipalps are a velvet-black. The abdomen is black but appears reddish due to a dense covering of orange-red urticating hairs.
Web Type
Terrestrial burrower; does not build a prey-catching web. It uses silk to line its burrow for structural integrity and to sense vibrations from passing prey.
Eye Arrangement
Small ocular tubercle located at the front center of the carapace, containing eight eyes in two compact rows. They have poor eyesight and rely primarily on vibrations.
Leg Characteristics
Thick, sturdy legs typical of terrestrial New World tarantulas. The legs are covered in dark black hairs with specialized 'scopulae' (tiny hairs) on the feet for climbing smooth surfaces.
Venom & Safety Information
Venom Information
Possesses mild, protein-based venom intended for paralyzing prey. The venom is not considered medically significant to humans, often compared to the sting of a honeybee.
Medical Significance
Low danger level. Bites are extremely rare and usually only occur if the spider is pinned. A greater concern for humans is their urticating (irritating) hairs, which they can flick from their abdomen, causing skin and eye irritation.
Safety Recommendations
If found in a home (locally), use the 'cup and card' method for relocation. Do not handle directly to avoid urticating hairs. If hairs contact skin, wash with soap and water; if they enter eyes, seek medical attention for irrigation.
Habitat & Behavior
Habitat & Range
Endemic to the central highlands of Mexico, particularly in the states of Guerrero, Mexico, and Morelos. They prefer dry thorn forests and tropical deciduous forests, living in deep burrows.
Behavior & Temperament
Known for a docile and calm temperament compared to many other spiders. They are slow-moving, nocturnal, and generally prefer to retreat to their burrow rather than attack if threatened.
Diet & Prey
Opportunistic carnivore. Feeds primarily on large insects such as crickets, roaches, and beetles. In the wild, they may occasionally take small vertebrates like lizards or frogs.
Seasonal Activity
Active year-round in Tropical climates, but peak visibility occurs during the rainy season when males wander in search of mates.
Description
The Mexican Golden Red Rump is a prized species among arachnologists for its striking color contrast and manageable personality. A classic representative of the Brachypelma genus, it serves as a stunning example of New World tarantula evolution, thriving in the arid mountains of Mexico.
Key Features
Golden-tan carapace, velvet-black legs, and a dark abdomen covered in red-orange setae. Absence of stripes on the legs distinguishes it from some cousins.
Similar Species
Brachypelma vagans (Mexican Red Rump) which has a black carapace; Brachypelma hamorii (Mexican Red Knee) which has orange patches on its leg joints.
Life Cycle
Slow-growing species. Females can live for 20-30 years, while males live significantly shorter lives (5-7 years). Mating involves a complex 'drumming' ritual followed by the female producing an egg sac containing 400-800 spiderlings.
Ecological Importance
Acts as an essential apex invertebrate predator, regulating populations of agricultural pests and providing a food source for larger animals like coatis and certain birds of prey.
Conservation Status
Listed on CITES Appendix II. Population is threatened by habitat loss and illegal poaching, though captive breeding has significantly reduced pressure on wild populations.
Interesting Facts
The genus Brachypelma was the first group of spiders to be protected under CITES (Convention on International Trade in Endangered Species) due to over-collection for the pet trade.
Photography Tips
Focus on the carapace to capture the golden texture. Use soft, diffused light to avoid glares on the dark legs. A top-down 45-degree angle best shows the contrast between the head and abdomen.
Identified: 2026-07-06T19:45:02.479184