Speckled-dun

Guides

• Callibaetis

  Speckled Duns

  Callibaetis is a genus of small minnow mayflies in the family Baetidae, comprising at least 30 described species distributed across North and South America. The genus has been taxonomically problematic, with recent phylogenetic work confirming its monophyly and establishing four subgenera. Species occupy diverse lentic habitats including ponds, lakes, and wetlands, with some populations adapted to variable salinity conditions.

  mayflyminnow-mayflyspeckled-dunBaetidaeEphemeropteralenticpondwetlandsalt-tolerancewater-quality-indicatorevening-emergence

• Callibaetis pictus

  Speckled Dun

  Callibaetis pictus is a small minnow mayfly in the family Baetidae, commonly known as the Speckled Dun. It is distributed across Central America and North America, including all of Mexico and the northern and southwestern United States. Like other mayflies, it has an aquatic nymphal stage lasting months to years, followed by a brief adult lifespan measured in hours to days. The species is part of the EPT index (Ephemeroptera, Plecoptera, Trichoptera) used to assess water quality in environmental monitoring.

  mayflyaquatic-insectbioindicatorEPT-indexEphemeropteraBaetidaeSpeckled-DunNorth-AmericaCentral-Americawater-quality-indicatorfly-fishing