The Brazilian wandering spider is the deadliest spider in the world. Its venom is toxic to a human's nervous system and can also kill adults.
The Sydney funnel-web spider can kill a person within an hour if you don't act in time. The Southern Black Widow is also a very dangerous poisonous spider found mainly in the USA, Canada and Latin America. The nurse's thorn finger is the most poisonous spider native to Germany. It can poison a person with its bite, but the poison is weak enough that it doesn't kill you.