9- Brazilian Wandering Spider Insect
Naturally, spiders are not insects. But by virtue of their resemblance with insects, many have commonly referred them as insects. Brazil has some of the deadliest spiders in the world and they are known to cause several deaths across the country. In fact, spiders are some of the few creepiest organisms on the world. In 2010, the Brazilian spiders found their names included in the Guinness books of world records for their deadliest poison.