Mayfly hatches are a common occurrence in the summertime across North America and the world. The adult mayfly only lives for a day or two and during that short window, they lay eggs in water that later hatch into larvae. The larvae live in the water for roughly a year before transforming into adult mayflies which then lay their eggs and die, continuing the perpetual cycle.
What this creates from the angler’s perspective is a concentrated food chain of insects, baitfish and big bass. As the bugs fall into the water, the bream eat the bugs, the bass find the bream and the angler interjects himself into the equation to take advantage of the whole situation. It’s a beautiful thing.
The locations of these mayfly hatches are pretty steady year to year, since the hatch of one year is dependent on where the eggs were laid the previous year. On some fisheries, there tends to be one giant hatch each year. On others, there are multiple hatches throughout the summer months. So once you find a hatch, be sure to return to that same area year after year in search of another, sometimes even finding it again week after week as there can be another hatch cycling through every few days in some of these places.