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Animal · Guyana, Suriname, Venezuela

Goliath birdeater

Theraphosa blondi — the name this animal has in the language scientists everywhere share.

The goliath birdeater is the largest spider in the world by weight and body size, with a leg span as wide as a dinner plate. It burrows in rainforest floors of northern South America.

Where does the goliath birdeater live?

Home: Rainforests of the Guiana Shield in northern South America.

In the wild you find it in: Guyana, Suriname, Venezuela, Brazil.

The short profile

Fully grown it measures Leg span up to 30 cm. It weighs about 0 175 kilograms. On the menu: meat.

The story behind it

Despite its alarming name, the goliath birdeater rarely eats birds; it mostly hunts on the forest floor at night for insects, worms, frogs and the occasional small rodent, using fangs up to 2 cm long to inject venom that is actually mild and roughly as painful to a human as a wasp sting. If threatened, rather than biting first, it prefers to rub bristly, barbed hairs off its abdomen with its legs, flicking them into the air toward an attacker; these hairs cause intense itching and irritation if they land in skin or eyes. It can also make a surprisingly loud hissing sound by rubbing bristles on its legs together, called stridulation, as a warning before resorting to more drastic defences. Goliath birdeaters live in burrows and can survive for over a year without eating. They remain common in their remote rainforest range.

Find it on the globe

Goliath birdeater is there as a tiny animated figure that breathes and looks around. From far away the planet is only a blue ball; detail arrives as you zoom in, and this one appears once you are close enough. Open it on the globe.

It sits at its real coordinates, not near them — the same numbers listed in the facts above. Switch off the layer for this kind of place and it disappears again; the buttons for that are down the right-hand edge.

Questions children ask

Does the goliath birdeater really eat birds?

Rarely. Despite its name, it mostly eats insects, worms, frogs and small rodents on the forest floor, and only very occasionally catches a small bird. Its name likely comes from one early explorer's account of it eating a hummingbird.

Is a goliath birdeater's bite dangerous to humans?

Not seriously. Its venom is considered mild and causes pain similar to a wasp sting for most people. Its main defence is actually flicking tiny barbed hairs from its abdomen, which cause itching and irritation.

How big is a goliath birdeater?

A goliath birdeater can have a leg span of up to 30 cm, about the size of a dinner plate, making it the largest spider in the world by mass and body size, though not by leg length alone.

Where these numbers come from

Every figure on this page was checked against public reference sources before publication. Where sources genuinely disagree, the text says so.

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