The "midge phenomenon" on Lake Erie refers to the massive, annual emergence of harmless, non-biting insects from the lake when water temperatures reach about (60) degrees Fahrenheit. These swarms, which can be so dense they appear on weather radar, are a sign of a healthy, clean lake ecosystem and serve as a vital food source for fish, birds, and other aquatic life. While a nuisance to humans, they are short-lived, with adults typically dying within a few days after mating. | cowtownchad