Originally Posted by Rebel Dragons

All 3 are a good source of nutrition for your plants. Flys pose no harm to the plants but as stated by others, crickets and ants can be quite harmful. I feed mine big black army ants that I find on my porch. You have to stun them first by flicking them HARD or by running them under HOT water. The hot water method seems to work best. It almost kills them but not close enough to stop them from curling up a bit and flailing around. Crickets are pretty harmless after the hot water method too.