The Largest Spider Ever Found: A Detailed Exploration



Spiders are fascinating creatures that inhabit various parts of the world. While some may find them creepy, others appreciate their intricate beauty and the important role they play in our ecosystem. Among the diverse species of spiders, there are a few that stand out for their sheer size. In this article, we will delve into the world of spiders and explore the largest spider ever found. We’ll cover their classification, habitats, anatomical features, and other interesting facts.

1. Classification of Spiders

Spiders belong to the class Arachnida and the order Araneae. This order is further divided into various families, including the Theraphosidae family, which is known for housing some of the largest spiders on the planet.

1.1 Theraphosidae Family

The Theraphosidae family, commonly referred to as tarantulas, consists of over 900 documented species. These spiders are characterized by their large size and hairy bodies, making them both intriguing and intimidating. While not all tarantulas are massive, some species within this family have gained significant attention due to their impressive dimensions.

2. The Goliath Birdeater: A Colossus Among Spiders

One of the most renowned and largest spiders ever found is the Goliath birdeater (Theraphosa blondi). This tarantula species, native to the rainforests of South America, holds the title for the largest spider by mass.

2.1 Physical Characteristics

The Goliath birdeater can reach a leg span of up to 30 centimeters (12 inches) and a body length of 13 centimeters (5 inches). However, it is important to note that these measurements can vary among individuals. The spider’s body is covered in thick, dark brown or black hair, which serves various purposes, including sensory perception, thermoregulation, and protection.

2.2 Habitat

The Goliath birdeater is predominantly found in the rainforests of northern South America, including countries like Brazil, Venezuela, and Suriname. These spiders construct burrows in the ground, which they line with silk to provide stability and insulation. They prefer areas with high humidity and moderate temperatures.

2.3 Feeding Habits

Despite its name, the Goliath birdeater does not primarily prey on birds. Its diet consists mostly of insects, small mammals, amphibians, and reptiles. Occasionally, it may consume small birds or bats, but such instances are rare. The spider’s strong jaws and venomous fangs allow it to overpower and immobilize its prey.

2.4 Behavior and Reproduction

Goliath birdeaters are generally solitary creatures, only coming together during mating season. The males often roam in search of females, while females tend to stay near their burrows. During courtship, the male performs a series of complex dances and drumming on the ground to attract the female’s attention. Once mating has occurred, the female lays an egg sac containing hundreds of eggs, which she guards until they hatch.

3. Other Large Spider Species

While the Goliath birdeater holds the record for the largest spider by mass, there are other species that rival it in terms of leg span or body length. Let’s explore some notable examples.

3.1 Huntsman Spider (Sparassidae Family)

The huntsman spider, also known as the giant crab spider, is another impressive arachnid when it comes to size. Although not as heavy as the Goliath birdeater, certain huntsman spider species possess enormous leg spans, making them visually striking. One example is the giant huntsman spider (Heteropoda maxima), which can have a leg span of up to 30 centimeters (12 inches).

3.2 Brazilian Salmon Pink Birdeater (Lasiodora parahybana)

The Brazilian salmon pink birdeater is a tarantula species native to Brazil. While it may not match the Goliath birdeater in terms of size, it is still an impressive spider. With a leg span of around 20 centimeters (8 inches) and a body length of approximately 7.5 centimeters (3 inches), it is a sight to behold.

4. Frequently Asked Questions (FAQs)

FAQ 1: Are Goliath birdeaters dangerous to humans?

No, Goliath birdeaters are not considered dangerous to humans. While they possess venomous fangs, their venom is not potent enough to cause significant harm to humans. However, their bites can still be painful and may cause localized swelling.

FAQ 2: Do Goliath birdeaters eat birds?

Despite their name, Goliath birdeaters do not primarily feed on birds. Their diet mainly consists of insects, small mammals, amphibians, and reptiles. While they may occasionally prey on small birds or bats, such instances are rare.

FAQ 3: Can Goliath birdeaters be kept as pets?

While some people do keep Goliath birdeaters as pets, it is important to note that they require specialized care and a suitable habitat. Additionally, their large size and venomous nature may not make them suitable for everyone.

FAQ 4: Are there larger spiders yet to be discovered?

It is highly possible that there are still larger spider species yet to be discovered. The natural world is vast, and new species continue to be identified regularly. With ongoing scientific research and exploration, we may uncover even more fascinating spiders in the future.

FAQ 5: How long do Goliath birdeaters live?

Goliath birdeaters have relatively long lifespans compared to other spider species. Females can live up to 20 years, while males have a significantly shorter lifespan of around 3 to 6 years.

FAQ 6: How do Goliath birdeaters defend themselves?

Goliath birdeaters possess several defense mechanisms. When threatened, they may rub their legs against their abdomen to produce a hissing sound, which serves as a warning to potential predators. They can also release irritating hairs from their abdomen, causing discomfort to predators or humans.

FAQ 7: Are Goliath birdeaters endangered?

The Goliath birdeater is not currently considered an endangered species. However, habitat destruction and illegal collection for the pet trade pose potential threats to their populations. Conservation efforts and proper regulation are crucial to ensure their long-term survival.


The world of spiders is full of incredible diversity, and the largest spiders never fail to captivate our attention. The Goliath birdeater stands out as an awe-inspiring arachnid, both in terms of its massive size and its unique adaptations. While there are other large spider species that deserve recognition, the Goliath birdeater holds the title for the largest spider by mass. As we continue to explore and discover the wonders of the natural world, it is important to appreciate and protect these fascinating creatures.

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