Goliath Bird Eating Tarantula Theraphosa sp. We have some ultra impressive Goliath Bird Eating tarantulas for sale at rock-bottom prices. These arachnids are the second largest in the world, topping out with a legspan of approximately 12", and perhaps the heaviest in existence. This species can live up to 25 years, and was given its name when early explorers witnessed one eating a hummingbird. This species is incredibly impressive. When you buy a tarantula from us, you automatically receive our 100% live arrival guarantee.