Baetis tricaudatus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Ephemeroptera
- family: Baetidae
- genus: Baetis
- species: Baetis tricaudatus
Wasaga Beach
Ontario- Cabano
Quebec
Canada
Greenfield
Massachusetts- Klamath Falls
Oregon
United States