Red speckled dun mayflies signal clean water at Prairie Loop

October 22, 2026

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mayflies were recorded on October 20, 2026 at Prairie Loop Nature Trail in Greenwood Village.¹ This pollution-sensitive mayfly indicates clean, well-oxygenated water, marking water quality suitable for aquatic insect communities.¹

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More about Red Speckled Dun

Red speckled dun mayfly found at Tilden Regional Park

October 22, 2026

A Red Speckled Dun mayfly () was recorded at Tilden Regional Park on October 17. Mayfly larvae in Callibaetis are pollution-sensitive aquatic insects requiring clean, well-oxygenated water, indicating that some creeks in the ecosystem still support suitable conditions for these taxa.