Discover the Largest Arachnid Species Alive Today

Did you know that there are arachnids alive today that can reach astonishing sizes? We’re not talking about your average house spider here. We’re talking about the largest arachnid species alive today.

These creatures are truly remarkable in their size and have captured the fascination of scientists and nature enthusiasts alike.

From spiders with bodies weighing up to a whopping 175g to others with leg spans measuring up to 30cm, the world of arachnids is filled with jaw-dropping giants. Whether it’s the Goliath birdeater, the Brazilian Giant Tawny Red, or the giant huntsman spider, each species has its own unique features that contribute to their remarkable sizes.

In this blog article, we’ll take a closer look at the largest arachnid species alive today, their characteristics, and their roles in their respective ecosystems. Get ready to be amazed by the fascinating world of these incredible creatures.

The Goliath Birdeater – Largest Spider by Body Mass

The Goliath birdeater, scientifically known as Theraposa blondi, is the largest spider in the world by body mass. It can weigh up to 175g and has a body length of 13cm. This species is found in the rainforests of northern South America.

Despite its name, the Goliath birdeater primarily feeds on worms, amphibians, and large insects. However, it has been known to occasionally kill and eat birds.

See also  What Animal has the Strongest Teeth: Crocodiles Have the Most Powerful Teeth on Earth:

It is notable for its impressive size and the fascinating engraving that gave it its name.

Goliath birdeater

The Giant Huntsman Spider – Largest Leg Span

The giant huntsman spider, also known as Heteropoda maxima, holds the record for the largest leg span of any spider. It can have a leg span of up to 30cm, approximately the size of a dinner plate. This species is native to Laos in Southeast Asia.

The giant huntsman spider is known for its crab-like legs and twisted joints, which allow it to move in a crab-like manner. It is a fast-moving spider that hunts prey instead of building webs.

Here are some key features of the giant huntsman spider:

  • Leg span of up to 30cm
  • Crab-like legs and twisted joints
  • Fast-moving and predatory
  • Feeds on insects, other spiders, birds, and small rodents
  • Common cannibalism behavior

The giant huntsman spider feeds on a wide range of prey, including insects, other spiders, and even small vertebrates like birds and rodents. Its large leg span allows it to be an efficient predator, covering more ground and capturing a variety of prey.

It is worth noting that the giant huntsman spider exhibits cannibalism behavior, where the females often consume males after mating. This behavior is common in many spider species, ensuring the survival of the offspring and providing the female with nourishment.

giant huntsman spider

The giant huntsman spider’s impressive size and predatory nature make it a fascinating arachnid to study. Its unique anatomical features and hunting strategies contribute to its success as a top predator in its ecosystem.

Other Large Arachnid Species

In addition to the Goliath birdeater and the giant huntsman spider, there are several other large arachnid species that are worth mentioning. These species showcase impressive size and unique characteristics, adding to the intrigue of the arachnid world.

See also  Most Muscular Animals in the World: A User-Friendly Dive into Strength and Power

Brazilian Giant Tawny Red

The Brazilian Giant Tawny Red is a tarantula species that can be found in Brazil, Uruguay, Paraguay, and Argentina. With a leg span of around 23cm, it is known for its docile nature and striking appearance. Despite its large size, this tarantula is considered to be relatively harmless to humans.

King Baboon Spider

The King baboon spider, native to Uganda, Tanzania, and Kenya, is another arachnid with an impressive leg span of approximately 20cm. It gets its name from its unique defense mechanism called stridulation. By rubbing its leg hairs together, the spider creates a hissing noise to ward off potential threats.

Columbian Giant Tarantula

Found in the rainforests of Brazil and Colombia, the Columbian giant tarantula exhibits interesting defensive tactics when faced with danger. It is known to bob, spin, and kick with its back legs, making it a formidable opponent. This species can have a leg span of up to 20cm, making it one of the largest tarantulas in the world.

Sri Lankan Ornamental Tarantula

The Sri Lankan ornamental tarantula, also known as Poecilotheria fasciata, is a visually striking arachnid with vibrant colors and patterns. It is a member of the tarantula family and can have a leg span of up to 18cm. Despite its beauty, this species is also known for its predatory behavior, preying on lizards, snakes, birds, and small rodents.

Brazilian Wandering Spider

The Brazilian wandering spider, sometimes referred to as the banana spider, is notorious for its venomous bite. This spider has a leg span of up to 14cm and is often found in banana shipments, hence its nickname. It is considered one of the most venomous spiders in the world and should be approached with caution.

See also  Giant Sea Turtles: The Biggest Species Explored

Brazilian Giant Tawny Red

These arachnids represent the diversity and adaptability of spiders in different regions of the world. From the docile Brazilian Giant Tawny Red to the venomous Brazilian wandering spider, each species contributes to the intricate tapestry of the arachnid kingdom.


In conclusion, the world is home to a diverse range of large arachnid species. The Goliath birdeater, with its impressive body mass, holds the title for the largest spider, while the giant huntsman spider boasts the largest leg span.

These extraordinary creatures, along with other notable arachnids like the Brazilian Giant Tawny Red, King baboon spider, Columbian giant tarantula, Sri Lankan ornamental tarantula, and Brazilian wandering spider, contribute to the fascinating world of arachnids.

Each species has its unique characteristics and habitats, adapting to different environments and playing significant roles in their respective ecosystems. While some people may find these creatures intimidating, their presence is vital for maintaining balance in nature.

Without them, pest populations could increase uncontrollably, causing disruption and potentially leading to ecological imbalances. Therefore, it is important to appreciate and respect the largest arachnid species and their important role in the natural world.

From the Goliath birdeater’s impressive size and eating habits to the giant huntsman spider’s massive leg span, these arachnids offer a glimpse into the wonders of nature’s diversity. As we continue to explore and understand the complexities of the animal kingdom, these largest arachnid species serve as reminders of the incredible variety that exists in our world.