The state of observing numerous, often small, flying insects can be referred to as a specific atmospheric condition. Consider, as an example, a twilight setting during the summer months where the air is thick with gnats and other flying insects; this situation describes this phenomenon.
Such conditions are crucial for ecological balance, serving as a significant food source for a wide range of animals, including birds, bats, and amphibians. Historically, the presence, or absence, of these insect populations has been an indicator of environmental health and seasonal changes.