How long does an average house fly live?

20 to 30 days

Ditto to Seesuls answer.
My 2nd answer: Too long.

About five minutes after I find my fly swatter! LOL!

Dab a litte nail polish on one fly toe and then you can discover when he croaks.

Actually, gail, you’re not far off on that one. Back during the California Mediterranean fruit fly problem, I took my then four year old up to an insect display at a park in the Santa Cruz Mountains. Downstairs, they had a traveling insect zoo and experts to answer questions. Upstairs, they had a special Med-fly exhibit on how they were dealing with the problem. It was a nice Saturday and my husband asked the government expert that was handling the display how he ended up working a weekend like that. His answer was: “I had a choice, spend the week in a dark room, looking under a microscope, painting dots on sterile Med-flies, or answering questions here, so I chose the better of the two”.

But gail, if frog eats him/her and croaks, then how will they ever know? Kind of like that tree falls in a forest question, isn’t it?

Frog? Frog? where did he come from? That would taint the experiment, I guess.

And after the teeth-whitening episode. do I dare assume that part II (“does it live any longer when on a diet?”) is serious? Which diet; Atkin’s; Ornish; South Beach or is it South Park?