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Spiders

The Biggest Spider in The World

Imagine a spider the size of your hand… or even bigger! That's the reality for the world's largest arachnid.  What’s the biggest spider in the world? The biggest spider in the world is the Goliath Birdeater.  This giant spider is truly massive, it can grow to be as large as a dinner plate.  Interested to…

  • By Harvey Hughes
  • February 10, 2025
  • Last Updated May 19, 2026

Imagine a spider the size of your hand… or even bigger! That’s the reality for the world’s largest arachnid. 

What’s the biggest spider in the world? The biggest spider in the world is the Goliath Birdeater. 

This giant spider is truly massive, it can grow to be as large as a dinner plate. 

Interested to learn more about these large spiders? We have answers to the most common questions. 

The Goliath Birdeater: A Giant Among Spiders

Picture this: a spider so enormous that its legs could easily span your face. That’s the Goliath Birdeater (Theraphosa blondi), a fearsome tarantula that calls the rainforests of northern South America home.

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How Big is the Goliath Birdeater?

The Goliath Birdeater is not only the longest spider in the world, but also the heaviest. Its body can be as large as a grapefruit, and its fangs can be up to 1.5 inches long. 

To put its size into perspective, a Goliath Birdeater’s leg span is about the same as the width of a human hand. Adult Goliath Birdeaters can have a leg span of up to 11 inches and weigh up to 6 ounces. 

Lifestyle, Behavior and Diet

The world’s largest spider is a sneaky hunter! It likes to hide in its burrow or a termite mound and wait patiently for dinner to come by.

The Goliath Birdeater likes to eat:

  • Insects
  • Frogs
  • Lizards
  • Small Mammals (like Mice)

The Goliath Birdeater pounces! It uses its huge fangs to inject venom, quickly paralyzing its prey.

The Goliath Birdeater in Popular Culture

From Hollywood blockbusters to thrilling documentaries, the Goliath Birdeater has captivated the imaginations of people worldwide. It’s even starred in several video games! 

But don’t worry, this giant arachnid isn’t out to get you. Its venom is primarily designed for its prey, and humans usually experience only minor discomfort if bitten.

The Largest Spider’s Conservation Status

While not currently endangered, the Goliath Birdeater faces threats from illegal wildlife trade. In some countries, it’s protected by law, but many are still captured and sold as exotic pets, putting a strain on wild populations.

FAQ: The World’s Biggest Spider

What is the biggest spider in the world?

The Goliath Birdeater (Theraphosa blondi) is widely recognized as the largest spider in the world by mass and size.

How big is the Goliath Birdeater?

It can have a leg span of up to 11 inches (30 cm) and weigh over 6 ounces (170 grams).

Where is the Goliath Birdeater found?

This spider is native to the rainforests of northern South America, particularly in countries like Venezuela, Brazil, Guyana, and Suriname.

Does the Goliath Birdeater really eat birds?

Despite its name, it rarely eats birds. Its diet primarily consists of insects, small rodents, frogs, and lizards. However, it is capable of catching and eating small birds if the opportunity arises.

Is the Goliath Birdeater dangerous to humans?

The Goliath Birdeater is not considered dangerous to humans. Its bite is venomous but typically causes only mild pain, swelling, and irritation, similar to a wasp sting.

What does the Goliath Birdeater look like?

It has a hairy, reddish-brown body and legs. Its large fangs can be up to 1 inch (2.5 cm) long.

How does the Goliath Birdeater defend itself?

The spider uses urticating hairs (barbed hairs on its abdomen) as a defense mechanism. When threatened, it flicks these hairs toward predators, causing irritation.

How long does the Goliath Birdeater live?

Female Goliath Birdeaters can live up to 15–25 years, while males have a shorter lifespan of about 3–6 years.

Can the Goliath Birdeater be kept as a pet?

Yes, some people keep them as exotic pets, but they require specific care and conditions to thrive. Their size and defensive behaviors make them more suitable for experienced handlers.

How does the Goliath Birdeater reproduce?

Mating involves a male transferring sperm to the female using specialized appendages. Females lay eggs in a silk sac, which they guard until the spiderlings hatch.

Are Goliath Birdeaters endangered?

They are not currently classified as endangered, but habitat loss and collection for the exotic pet trade could pose threats to their populations.

Can the Goliath Birdeater make noise?

Yes, it can produce a hissing sound by rubbing its legs together, a behavior known as stridulation, which is used to scare off predators.

How does the Goliath Birdeater compare to other large spiders?

While the Goliath Birdeater is the heaviest spider, the Giant Huntsman Spider (Heteropoda maxima) holds the record for the largest leg span, measuring up to 12 inches (30 cm).

For questions to common spider problems in Utah, contact H2 Pest Control or use the following resource links:

Learn More About Spiders

Spider Extermination

The Life Cycle of a Spider

Get Rid of Spiders in Utah Guide

How to Get Rid of Black Widow Spiders

Spider Bites on Dogs

How to Treat a Spider Bite

The Most Dangerous Spiders in the United States

Spider Bite Symptoms

Spider Eggs and What They Look Like

How Many Legs Do Spiders Have?

Common House Spider

Yellow Garden Spider

Redback Spider

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