Spiders are not a topic of interest or appeal to everyone, and many people are frightened by the sight or thought of a spider. The terror which spiders may cause some people is known as Arachnophobia. All spiders belong to the Arachnid class of anthropods which have eight legs, but not all spiders weave webs to trap their prey. Some are ground dwellers preferring to hide or dig burrows. Spiders are in almost every region or climate of earth except for the Arctic poles, in the oceans or at extreme altitudes. The biggest spiders in the world are in South America.
Native to South America, Theraphosa blondi is the largest member of the tarantula family. It is the heaviest spider in the world, and its leg span can reach twelve inches. Its venom-injecting fangs are nearly an inch long, and it can deter predators by flicking off abdominal hairs. Despite its name, the Goliath bird-eater does not eat only birds.
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