Caterpillars, crickets, wasps and ants -- insects are eaten by a third of the world's population. Supplementing diets as an environmentally-friendly and nutritious food source, nearly 2,000 types are currently consumed, with trade thriving in cities like Bangkok and Kinshasa. The trend is even taking hold in Europe, where some high-end restaurants are serving up beetles, grasshoppers and other insects as delicacies. VIDEOGRAPHIC
