Olive Upright
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 4,445
Yellow May Dun
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 1,186
Large Brook Dun
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 1,160
Ecdyonurus venosus
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 593
Electrogena lateralis
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 452
Ecdyonurus dispar
- Group
- Mayflies
- Peak month
- September
- Records since 2000
- 194
Kageronia fuscogrisea
- Group
- Mayflies
- Peak month
- May
- Records since 2000
- 60
Rhithrogena germanica
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 57