The Mayflies (Hexagenia) are thick

The good news is, it means the Lake is healthier--I think. Although they aren't really sure why they have returned, since farming and industrialization of this area originally also contributed to their growth. See this article. The Mayfly virtually disappeared in the 1950s, and since the early 90s have made such a come back that they pile up under street lights and can cause slippery streets and power outages! Their life on land is quite brief, exhausting themselves at any available light source, have sex, then die, but they have a rather complex life before coming ashore.




You have to avoid walking near the street lights--couple of inches thick.