33+ Brazilian Wandering Spider Size Background. To @it's impossible to make me angry: Brazilian wandering spiders, also called armed spiders or banana spiders, belong to the genus phoneutria, which means murderess in greek.

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Brazilian wandering spiders may be the most venomous spiders in the world, but they rarely kill humans as their bites typically contain very little everything you need to know about brazilian wandering spiders. The leg length of this spider can reach up to 6 inches, with 2 inches. Its bite can be deadly to humans, especially children.

The female banana spider usually grows up to 2 inches in size while the males are only able to grow up to an inch.

It was first discovered in brazil hence its name. The spiders also have a signature, dirty yellow opistosomas (a spider's equivalent of a butt). They will fight each other over territory if there are too many in one area. These species are sometimes also referred to as banana spiders because they are frequently found.