Science Challenge #7 June Question 2. Of the many species of spiders (perhaps more than 100,000 species of spider exist) very few are dangerous to humans. Which of the four named below has a poisonous venom in its fangs that is deadlier even than that of a rattlesnake? Wolf spider, tarantula, black widow spider, recluse spider. Answer: (brown) recluse spider Correct responses received from: SunDevil, Beth Gordon Rowen, Alex Halliday, Richard Yamagata, J. Higgins