Heptagenia flava
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Ephemeroptera
- family: Heptageniidae
- genus: Heptagenia
- species: Heptagenia flava
Ohne
Lower Saxony
Güstrow
Torgelow-Holländerei
Mecklenburg-Vorpommern
Althornbach
Herchweiler
Hornbach
Reichweiler
Selchenbach
Rheinland-Pfalz
Blankenberg
Pottiga
Thuringia
Germany
Zgorzelec
Lower Silesia
Poland