This photo shows a cricket eating a small, dainty paper wasp.
The paper wasp was already dead, so no murder was committed.
Now think of the wasp being a hornet which, given we’ve recently suffered a hornets’ nest near the house, would be cause for rejoicing.
Scale up the cricket accordingly and the skull-like head and stringy limbs are something from a nightmare.
It’s not that much more of a stretch to imagine it munching on a human being; now you’ve got the monster for a blockbuster horror movie.
My point is that inspiration of all sorts is there if you just look around you, and observe the small things.