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Details of the Giant Mayfly
CHARACTERISTICS: Giant Mayflies are common in the Eastern United States and can appear in large quantities in the summer months. They represent one of the largest Mayfly type insects in North America and dwell in and around water sources, laying their eggs in the water to help their larvae burrow themselves into the soil / sand below.
Giant Mayfly larvae are yellow to brown and black. They have an identifiable three-pronged tail and slightly resemble their adult counterparts. Adult Giant Mayflies can be identified by their twin filament tails, darkened wings and yellow and brown patterned coloring on their bodies.
ADULT SIZE (Length, not including legs):
18mm to 30mm
(0.71in to 1.18in) (Compare Size)
IDENTIFYING COLORS: yellow, brown
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| Maine, Vermont, New Hampshire, Rhode Island, Massachusetts, New Jersey, New York, Pennsylvania, Maryland, Virgina, North Carolina, South Carolina, Delaware, West Virginia, Washington |
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Courtesy of Michelle S. from British Columbia
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| More Pictures of the Giant Mayfly: |
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| Images @InsectIdentification.org • Hover over each image to view submission credit |
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