Definition of Brazilian wandering spider
: any of a genus (Phoneutria) of large, venomous, nocturnal spiders of tropical South America that do not build webs and actively hunt prey by traveling on the ground
Note: Brazilian wandering spiders adopt a characteristic aggressive defense posture in which their front legs are raised straight up into the air.
Along the way we meet some scary hairies, among them a Brazilian wandering spider, the most dangerous spider in the world, we're told, with venom 18 times as potent as a black widow's …— Chip Crews, Washington Post, 11 Feb. 2006— called also banana spider
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The first known use of Brazilian wandering spider was in 1995
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