Some cultures use insect as foods, ex locust, and I heard about it. See pictures. Second picture from CNN.com (travelling)

See: https://www.greenprophet.com/2013/03/feasting-on-locusts-a-recipe-from-moshe-bassons-kitchen/

In Chinese culture, cicada molting is used as a medicine....

https://www.herbalogic.com/blogs/herbiage/8166877-spotlight-on-herbs-cicada-molting

"In modern herbal medicine, the insect itself is not the key ingredient. Rather, herbalists use the cast off, mineralized exoskeleton left behind when the nymph emerges from the ground, climbs the nearest suitable vertical surface, and breaks out into wingy adulthood."

Acturally, eating bugs become chic. See this report. Meet chef Andy Holcroft’s Grub Kitchen, Britain’s first full-time insect restaurant.

http://www.bugsfordinner.com/eating-insects-is-chic-982233.html

Yes insects can be eaten such as desert locust,some bugs ,some caterpillars which can be canned and then eaten, and others .Salam and best regards .