Insects often contain more protein, fat, and carbohydrates than equal amounts of beef or fish, and a higher energy value than soybeans, maize, beef, fish, lentils, or other beans. According to a 2004 United Nations Food and Agriculture Organization (FAO) report, caterpillars of many species are rich in potassium, calcium, magnesium, zinc, and iron, as well as B-vitamins. In some African regions, children fight malnutrition by eating flour made out of dried caterpillars. Pregnant and nursing women as well as anemic people also eat caterpillar species high in protein, calcium, and iron." Source
Al Jazeera's news reporter, Charles Stratford walks and talks us through the market stalls in Vientiane, Laos in this news documentary video here about moves afoot towards developing and promoting insect farming.
Presently large swathes of farming districts in the south east of Australia are under threat of being severely munched up by a large areas of locust plagues and the plague control organizations are spending large sums of money on aerial spraying of toxic poisons. Maybe we ought to be looking at ways to hoover them up for the dinner table, which seems possible since insect farming in Australia already exists !