The Brazilian Black Tarantula is one of the largest spiders in the world with a legspan the size of a dinner plate and an abdomen as big as a chicken's egg.  Despite their large size and fearsome appearance they are one of the most friendly tarantulas around and although quick it is very rare that they will bite.  Their diet consists of large insects but in truth anything that they can over power could be considered food including mammals, lizards and even snakes.