Adult Mycetophilidae sometimes gather in great numbers in various hiding places, under tree roots and holes, and in general they are the most common insects in our forests.

In addition to the fruiting bodies of cap mushrooms, they also inhabit wood fungi and can be found under the bark of decaying trees.

However, under indoor conditions they often lack feeding substratum, so they gnaw at tender young roots and underground shoots of plants.

[3] Although fungus mosquitoes are generally more of an annoyance than a threat, their presence should be taken seriously and measures to control and eliminate this pest should be started as soon as possible after detection.

The ability to produce their own light may be used by some predatory larvae as a lure for potential prey, although it also obviously makes them more susceptible to predation or parasitism.

Mycetophilids, including some extant genera, are well represented in amber deposits and the group appears to have been well established and diversified by the Cretaceous period at the latest.