Crepuscular-emergence
Guides
Caenis latipennis
small squaregilled mayfly
Caenis latipennis is a small squaregilled mayfly in the family Caenidae, distributed across Central and North America including Canada, the United States, and Mexico. The species inhabits small prairie streams with sandy substrates and exhibits a multivoltine life cycle with overlapping generations. Adult emergence occurs primarily at dusk, with females completing mating and oviposition in approximately 37 minutes.