I’ve (long ago) done survival trips - 24, 48, 72 hours where you’re dropped off in the middle of nowhere with a knife, a flint and a pancho.
I know how to get water in the desert, trap animals with a figure four deadfall, have eaten rattlesnake and rabbit and even grubs below a fallen log.
But things would really have to be bad before I eat cicadas.
;-)
Really bad.