What is the largest species of spider?

The largest species of spider is the Goliath bird-eating spider (Theraphosa blondi), which can have a leg span of up to 30 centimeters (12 inches). Native to the rainforests of South America, this massive tarantula is primarily terrestrial and feeds on insects, small amphibians, and occasionally small vertebrates. Despite its intimidating size, the Goliath bird-eating spider is not dangerous to humans, though its bite can be painful. It is known for its impressive size and formidable appearance.