The flies will eat before mating. Most females will mate only once and store sperm in the semen bag hold (spermatheca) females lay eggs into groups of 100-150 eggs on fecal piles of animal manure and organic waste scrap rotting spawn every 3-4 days throughout its life, eggs take 12-24 hours to reef.A worm, white worm with a 3 phase takes 3-7 days and before it will pupate leave the Klan sources of food to dry out. Worms dig holes into the soil and pupate in the cover (puparium) red-brown pupa takes 3-5 days to the adults, aged 15-25 days, or two months if there are no food will live for about 2-3 days the life cycle from egg to adult takes 7-10 days the serious