Common Yellow Sally
- Peak month
- April
- Records since 2000
- 3,775
- Scientific name
- Isoperla grammatica
Common Small Yellow Sally
- Peak month
- April
- Records since 2000
- 3,436
- Scientific name
- Siphonoperla torrentium
Smooth Needle Fly
- Peak month
- April
- Records since 2000
- 2,645
- Scientific name
- Leuctra inermis
Late Needle Fly
- Peak month
- September
- Records since 2000
- 2,409
- Scientific name
- Leuctra fusca
Toothed Small Brown
- Peak month
- April
- Records since 2000
- 2,052
- Scientific name
- Amphinemura sulcicollis
Common Early Brown
- Peak month
- October
- Records since 2000
- 2,046
- Scientific name
- Protonemura meyeri
Orange-striped Stonefly
- Peak month
- September
- Records since 2000
- 1,953
- Scientific name
- Perlodes mortoni
Early Needle Fly
- Peak month
- April
- Records since 2000
- 1,872
- Scientific name
- Leuctra hippopus
Common February Red
- Peak month
- April
- Records since 2000
- 1,846
- Scientific name
- Brachyptera risi
Scarce Small Yellow Sally
- Peak month
- April
- Records since 2000
- 1,468
- Scientific name
- Chloroperla tripunctata
Willow Fly
- Peak month
- April
- Records since 2000
- 1,342
- Scientific name
- Leuctra geniculata
Black Needle Fly
- Peak month
- April
- Records since 2000
- 634
- Scientific name
- Leuctra nigra
Perla bipunctata
- Peak month
- April
- Records since 2000
- 630
- Group
- Stoneflies
Nemoura avicularis
- Peak month
- October
- Records since 2000
- 449
- Group
- Stoneflies
Dinocras cephalotes
- Peak month
- April
- Records since 2000
- 442
- Group
- Stoneflies
Perlodes microcephalus
- Peak month
- October
- Records since 2000
- 343
- Group
- Stoneflies
Leuctra moselyi
- Peak month
- September
- Records since 2000
- 307
- Group
- Stoneflies
Nemoura cinerea
- Peak month
- April
- Records since 2000
- 285
- Group
- Stoneflies
Nemurella pictetii
- Peak month
- March
- Records since 2000
- 248
- Group
- Stoneflies
Nemoura cambrica
- Peak month
- April
- Records since 2000
- 220
- Group
- Stoneflies
Nemoura erratica
- Peak month
- March
- Records since 2000
- 151
- Group
- Stoneflies
Protonemura praecox
- Peak month
- October
- Records since 2000
- 148
- Group
- Stoneflies
Northern February Red
- Peak month
- February
- Records since 2000
- 125
- Scientific name
- Brachyptera putata
Diura bicaudata
- Peak month
- April
- Records since 2000
- 105
- Group
- Stoneflies
Rhabdiopteryx acuminata
- Peak month
- March
- Records since 2000
- 98
- Group
- Stoneflies
Taeniopteryx nebulosa
- Peak month
- November
- Records since 2000
- 89
- Group
- Stoneflies
Zwicknia bifrons
- Peak month
- March
- Records since 2000
- 78
- Group
- Stoneflies
Amphinemura standfussi
- Peak month
- April
- Records since 2000
- 67
- Group
- Stoneflies