We got ants! Lots of them in the desert, but for reasons unknown they form one monster that the humans start to hunt down. Total letdown when I watched this! I was expecting the humans to be on a giant anthill or something with virtually no hope of escape and I get a monster made of ants that is easily dispatched!
https://www.imdb.com/title/tt0343449/?ref_=nv_sr_srsg_0