There are some amazing facts on what these spiders eat and what they are eaten by so I am going to tell you a few of them. First off you should know that goliath bird eating spiders eat many things such as crickets, mice, and many other small insects and mammals. You also should know what eats these giant spiders well many things et these spiders such as hawks, owls, skunks, and snakes but their biggest predator are the spider wasps also known as tarantula hawks. Also all of these spiders must have their food in a liquid form because they have such tiny mouths that they can't eat. So in order to get their food in a liquid form when the spiders find food they bite into their food which puts venom in their prey. Then the venom from the spider starts to turn into poison and attack the prey's nervous system. Within one to two days the prey is nothing but a pile of hair and bones. goliath spiders use stealth when an animal is approaching. The spider sneaks back into its burrow and wait for the prey to get closer before jumping out from the burrow to attack. To end this off I will tell you how these spiders got their name. While an adult bird goes out to look for food the goliath spider goes into the bird's nest and eats the baby bird hence the name goliath bird eating spider.