lentävä hirviö was released in the year 1957。lentävä hirviö is also called as The Deadly Mantis, The Incredible Praying Mantis, The Giant Mantis, Mantis, Mantide omicida, Kontinent i panik, Chose qui surgit des ténèbres。

The calving of an Arctic iceberg releases a giant praying mantis, trapped in suspended animation since prehistoric times. It first attacks military outposts to eat their occupants, then makes its way to the warmer latitudes of Washington and New York. A paleontologist works together with military units to try to kill it.