Sport-fishing
Guides
Hexagenia limbata
Giant Mayfly, Golden Mayfly, Big Michigan Mayfly, Great Leadwing Drake, Fishfly
Hexagenia limbata is a large burrowing mayfly native to North America, widely distributed across lakes and slow-moving rivers. Nymphs construct U-shaped burrows in muddy substrates and serve as important prey for fish and other aquatic predators. Adults emerge in synchronized mass events known as "hatches," living only 1–3 days without feeding, solely to mate and reproduce. The species is economically significant to sport fishing and serves as a bioindicator of clean freshwater ecosystems.