Ephoron album, commonly known as Say's Burrowing White Mayfly, is a species of mayfly in the family Polymitarcyidae. It is native to North America and is widely distributed across the eastern and central United States, particularly in slow-flowing, warm rivers where silt and fine sediment accumulate. The species is notable for its synchronized mass emergences, or “superhatches,” which often occur in late summer and can involve millions of individuals hatching in a single evening.

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