I love seeing evil pests getting eaten by the good guys!
Dave,
I was gonna post the following pics in another thread, but they just go perfectly with this theme you've started! I'm not trying to hijack your thread, but I can take down this pics if you want.
Every now and then, the aphids reach such epidemic proportions that they end up killing off most of a mesquite tree I use as a shadehouse for my orchids. In the previous pics you can see little yellow/orange dots which are aphids. Now comes for the good part! The juvenile (1st pic) and adult (2nd pic) ladybugs that chow on the aphids! Their population is now exploding too.