Thats correct they become Cossid moths with no mouth to feed their main purpose is to lay eggs they have a wing span of 16cm and come into the house all the time, I have some very nice young Witchetty grubs.......[spelling correction I was pulled up about this one big time] about 1inch long the snipping the head off part kinda makes me shudder but I'll have a go as they are high in protein and she only likes live food, people do eat them but I would have to be lost and starving in the outback with a small fry pan a knob of butter and garlic before I would eat them