Mayflies are insects in the order Ephemeroptera. Although the USGS range maps do not document any known mayfly populations in Yuba or Sutter Counties, it is likely that some such populations exist. The following mayfly species have been documented in adjacent counties.
Combmouth Minnow Mayfly Family
Small Squaregill Mayfly Family
Spiny Crawler Mayfly Family
- Attenella delantala (Nevada County and Placer County)
- Caudatella heterocaudata (Nevada County)
- Caudatella hystrix (Nevada County)
- Drunella flavilinea (Nevada County and Plumas County)
- Drunella spinifera (Nevada County)
- Ephemerella aurivillii (Nevada County)
- Ephemerella maculata (Colusa County)
- Ephemerella mollitia (Plumas County)
- Serratella levis (Nevada County)
- Serratella micheneri (Nevada County)
- Serratella teresa (Nevada County)
- Serratella tibialis (Nevada County, Plumas County, and Sierra County)
