The goliath bird-eater is the heaviest spider known, with the largest weighing up to 180g. Their 12inch legspan made them the largest spider known until, in 2008, a giant huntsman spider was discovered in Laos. The goliath, Theraphosa blondi, is far more common however and is even kept as an exotic pet. It is known as bird-eater because, like other large spiders, it will sometimes prey on small birds as well as small mammals and lizards
This is actually a real spider, this is not a movie model. It's a new giant "White Lady" type huntsman recently discovered in Israel, scientific name, Cerbalus aravensis. It's probably the largest of it's type found so far. Unfortunately it's under immediate threat.