Scientific name -- Gravex latibulis
Size -- 4-5' in diameter
Diet -- Vertebrates

This lurking spider hides in its burrow until an unsuspecting passerby walks near. The waiting spider leaps, lightning quick, upon its prey, dragging the victim back into its burrow to devour. After feeding these spiders are much less aggressive, though, 'much less aggressive' is only relative and these spiders remain very dangerous to approach.