Home / Environment / Millions of Mayflies Blanket Ohio Coastline
Millions of Mayflies Blanket Ohio Coastline
23 Jun
Summary
- Millions of mayflies are swarming Ohio's Lake Erie communities.
- Dense swarms have been visible on weather radar.
- Mayflies indicate good water quality in Lake Erie.

Mayflies are currently swarming Ohio's Lake Erie communities by the millions, with their dense presence recently captured on weather radar. These insects, which spend most of their lives underwater as nymphs, emerge annually starting in early June to mate and lay eggs.
Despite the mess they can create, the appearance of mayflies is a strong indicator of good water quality in Lake Erie. Their resurgence in the 1990s is attributed to environmental regulations like the Clean Water Act and ongoing conservation efforts.
Adult mayflies have a very short lifespan, living only one to two days, and do not possess mouths. Mayfly season typically lasts from late May through early July. They are also a food source for various birds, fish, and other insects.