LANGLEY, British Columbia (Reuters) - Layers of squirming black soldier fly larvae fill large aluminum bins stacked 10-high in a warehouse outside of Vancouver. They are feeding on stale bread, rotting mangoes, overripe cantaloupe and squishy zucchini. [snip] Enterra Feed, one of an emerging crop of insect growers, will process the bugs into protein-rich food for fish, poultry - even pets. After being fattened up, the fly larvae will be roasted, dried and bagged or pressed to extract oils, then milled into a brown powder that smells like roasted peanuts.