@jamibann Thanks so much for commenting, Issi! Yes, these are the insects that only live 24 hours, sometimes even less than that. We dread their arrival off the lake every year because they cling to everything and make a total mess. They're here right now, which means we have to sweep off the entire outside of the cottage every day. Here's a link to an interesting description of the mayfly's lifecycle: https://freshwaterblog.net/2011/05/16/the-mayflys-lifecycle-a-fascinating-fleeting-story/
