That is a good knowledge for the survivor's guide. In Asia, people eat insects and it is officially known that insect's protein is more healthy than the one from animals. It is free of chemicals, antibiotics etc. The only thing to research is which insects are not edible (poisonous).
For sure edibles are:
- ants (tasty sour if eaten raw)
Not all the insects are edible though.. Some of them are merely bitter..