Why Did God Make Flies?

There are more than 130,000 species of flies (genus = Diptera). They all have unique characteristics and different ecological niches (roles). You may find some of these annoying and some are certainly harmful to human interests.

I'm going to rephrase your question to "Why do flies exist?" Because at its core this is a scientific question that can be answered (I have no idea how to answer the religious question).

The short answer is that flies exist because they can. Everywhere in nature where there is a niche to be filled (a way of making a living that is not already being used by another species), there is an opportunity for a creature to start exploiting that niche and those that can do it better than others have more decedents than those that cannot and the genes that allow for this exploitation to occur increase in frequency in the population. Over time random mutations occur and some of these offer their possessors an advantage as well and then they too have more offspring because of that advantage and the genes for the advantage increase in frequency through time. In this way, flies became specialized (adapted) for their various niches.

In short, flies evolved to fill many niches and they have been very successful at it. As long as there is a way to make a living some organism will eventually adapt to fill it regardless of its effect on humans.

Why are there deadly viruses and bacteria? For the same reason.

Remember God's purpose for everything was to be good, even snakes and spiders, but Adam and Eve sinned. Anyways God had a plan b and used the flies to help the ecosystem. Religiously and Scientifically speaking.

Flies are probably more important to the eco-system then we are, young lad.

Of all the silly (and legitimately crappy) things people use to try to question God's existence, you pick flies?? What about war, or disease, or people who tip ten percent??

To judge God's of Egypt