Throughout my life I have seen some bacterial and fungal colonies in various sizes and colors, mostly on food or in hot humid dirty environments.
Putting bacteria and microfungi as well as other microbiology such as microalgae and archea aside, I ask here as a non biologist:
Why do what I can define as "aerophilic viruses" (viruses that can live significant amounts of time in the air and especially on surfaces interacting with the air - around 12 hours or more) don't establish colonies?
If such "aerophilic viruses" are so common and constantly going through evolution (perhaps faster than any other organism), why a microscope is needed to see them and one cannot see gatherings of them in the macro level?