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Brachypelma smithi

Meet the Brachypelma smithi. This tarantula loves to call Mexico its home. It has a close look-alike named Brachypelma hamorii, and both are known as the Mexican redknee tarantula. Some even thought they were the same!

Table Of Content hide

Physical Description and Identification

Are Brachypelma smithi Tarantulas Venomous?

Can Brachypelma smithi Tarantulas Bite?

Ecological Importance and Behavior of Brachypelma smithi Tarantula

Quick Facts

Did You Know

Physical Description and Identification

Adults

Size: They measure between 12.7 to 14 cm.

Color: In males, the carapace is beige or yellowish-brown with a black square, while females have a more bluish-black or dark pattern like a starburst on their carapaces. The abdomen of these spiders is black, while the legs are divided into orange and black segments.
Other Characteristic Features: Sexual dimorphism exists in this species as the females are larger than the males.

Eggs

Following the mating and laying of the fertilized eggs, the female will wrap them in webbing. She then carries the egg sac around in her mouthparts until they are ready to hatch.

Spiderlings

After 1-3 months, the eggs hatch, though the spiderlings, or slings, will remain inside the egg sac for 3 weeks more. Once this period has passed, they stay in the burrow for another 2 weeks before dispersing, becoming independent by this stage.

Males sexually mature at 4 years of age, while females do so later at 6-7 years.

The Web

Like other tarantulas, these spiders do not construct elaborate webbing for capturing prey. However, they will lay down a carpet of silk threads in front of their burrow to help them detect any intruders.

Are Brachypelma smithi Tarantulas Venomous?

Yes, Brachypelma smithi tarantulas have venom. They use it to catch the bugs they love to eat. For humans, this venom isn’t typically a big concern.

Can Brachypelma smithi Tarantulas Bite?

They sure can! These tarantulas are mostly calm, but if they feel cornered, they might bite. It’s always good to give them space and admire from afar.

Ecological Importance and Behavior of Brachypelma smithi Tarantula

The Brachypelma smithi tarantula is integral to its ecosystem, acting as both predator and prey. Its predatory habits help control populations of insects and other small animals, contributing to the ecological balance.

Natural Predators: While formidable, the Mexican redknee tarantula is preyed upon by coatis and specialized wasps, which helps regulate their numbers in the wild.

Prey-Predator Dynamics: By feeding on various small animals, these tarantulas aid in keeping the food web in check, preventing the overpopulation of certain species.

Relationship with Humans: Humans have a complex relationship with Brachypelma smithi. While they pose little danger to us, their popularity in the pet trade has led to conservation concerns, highlighting the need for responsible wildlife management.

Quick Facts

Other names	Mexican redknee tarantula
Lifespan	Males: 10 years, Females: 25-30 years
Distribution	Mexico, specifically the state of Guerrero
Habitat	Tropical deciduous forests
Predators	White-nosed coati, pepsis wasps
Diet	Frogs, large insects, mice

Did You Know

English arachnologist Frederick Octavius Pickard-Cambridge first described this spider in 1897.
The IUCN classifies this tarantula as “Near Threatened” or “NT” due to illegal trading.

In conclusion, Brachypelma smithi tarantulas are remarkable creatures that play a crucial role in their natural habitat.

Frequently Asked Questions

How can you identify a Brachypelma smithi tarantula?

You can identify a Brachypelma smithi by its distinct coloration and size, which ranges from 12.7 to 14 cm. This species has a black abdomen and legs with vibrant orange and black segments. Males have a yellowish-brown carapace with a black square, while females display a darker, starburst pattern.

What is the difference between male and female Brachypelma smithi?

The main difference between male and female Brachypelma smithi is size and carapace coloration, a trait called sexual dimorphism. Females are typically larger than males. Males exhibit a beige or yellowish-brown carapace with a black square, whereas females have a darker, bluish-black carapace with a starburst-like pattern.

How long does it take for a Brachypelma smithi to mature?

The maturation time for a Brachypelma smithi depends on its sex. Males reach sexual maturity relatively quickly, at around 4 years of age. Females are slower growing and do not reach full maturity until they are approximately 6 to 7 years old, which contributes to their longer overall lifespan.

Are Brachypelma smithi tarantulas venomous to humans?

Yes, Brachypelma smithi tarantulas are venomous, but their venom is not considered medically significant to humans. They use it to subdue insect prey. A bite might cause localized pain and swelling similar to a bee sting, but they are generally docile and unlikely to bite unless highly provoked.

Why do Brachypelma smithi tarantulas lay silk on the ground?

Brachypelma smithi tarantulas lay silk on the ground to detect movement, not to build a capture web. They create a silk carpet in front of their burrow that acts as a tripwire. This allows the tarantula to sense vibrations from potential prey or predators that approach its hiding place.

How does a female Brachypelma smithi care for her eggs?

A female Brachypelma smithi provides direct care for her eggs by first wrapping them in a protective silk webbing to form an egg sac. She then carries this sac in her chelicerae, or mouthparts, for one to three months until the spiderlings are ready to hatch inside it.

Can a Brachypelma smithi tarantula bite?

Yes, a Brachypelma smithi can bite, but it is a last resort for self-defense. These tarantulas are known for their calm temperament and would rather flee or flick urticating hairs from their abdomen when threatened. A bite typically only occurs if the tarantula feels cornered and has no escape.

Brachypelma smithi