Left: A lady beetle larva (Harmonia axyridis) feeds on Drosophila spp. adults. Right: A lacewing larva (family Chrysopidae) feeds on Drosophila spp. adults. For experiments, we placed Drosophila spp. adults on notecards and recorded their removal after one day. We added sand to these cards to provide traction to predators. (Photos by Caleb Wilson, Ph.D.)