It is now the peak season for fish flies to hatch in Lake St. Clair and Lake Erie. Fish flies, Mayflies, or shadflies emerge from bodies of water to hover around lights, cling to walls, mate and then die, all within the scope of about two days.
|This year, the hatch is so abundant that the swarms can be seen on radar in Detroit every evening.|
"The males will have swarms over vegetation near the water, and this will occur, depending on the species, around 8 p.m., and females will fly through the swarm ,and then a male will grab her and tumble to the ground and mate,They come out in thousands of numbers, because they only live for a couple of days, The idea is you have to find a mate in a short period of time so that's one reason why so many come out synchronously."When young the fish flies have cloudy wings but when they are mature the wings become very shiny. The flies are attracted to ultraviolet light and often stick to storefronts. Corkum predicted the hatch would peak around June 18. As the appended video shows, the swarms can be so thick as to create a sticky mess.