Welshman's Button Caddisfly
- Peak month
- April
- Records since 2000
- 22,673
- Scientific name
- Sericostoma personatum
Sandfly
- Peak month
- April
- Records since 2000
- 21,424
- Scientific name
- Rhyacophila dorsalis
Hydropsyche siltalai
- Peak month
- April
- Records since 2000
- 20,749
- Group
- Caddisflies
Cinnamon Sedge
- Peak month
- September
- Records since 2000
- 18,706
- Scientific name
- Limnephilus lunatus
Silver Sedge
- Peak month
- September
- Records since 2000
- 13,603
- Scientific name
- Odontocerum albicorne
Polycentropus flavomaculatus
- Peak month
- May
- Records since 2000
- 13,349
- Group
- Caddisflies
Hydropsyche pellucidula
- Peak month
- September
- Records since 2000
- 13,302
- Group
- Caddisflies
Agapetus fuscipes
- Peak month
- April
- Records since 2000
- 11,335
- Group
- Caddisflies
Square Caddisfly
- Peak month
- April
- Records since 2000
- 11,212
- Scientific name
- Lepidostoma hirtum
Grousewing Caddisfly
- Peak month
- June
- Records since 2000
- 10,051
- Scientific name
- Mystacides longicornis
Grannom Caddisfly
- Peak month
- September
- Records since 2000
- 8,446
- Scientific name
- Brachycentrus subnubilus
Silo pallipes
- Peak month
- April
- Records since 2000
- 8,270
- Group
- Caddisflies
Halesus radiatus
- Peak month
- April
- Records since 2000
- 7,901
- Group
- Caddisflies
Mystacides azureus
- Peak month
- July
- Records since 2000
- 7,824
- Group
- Caddisflies
Small Red Sedge
- Peak month
- May
- Records since 2000
- 6,888
- Scientific name
- Tinodes waeneri
Mottled Sedge
- Peak month
- May
- Records since 2000
- 6,879
- Scientific name
- Glyphotaelius pellucidus
Athripsodes cinereus
- Peak month
- May
- Records since 2000
- 6,717
- Group
- Caddisflies
Plectrocnemia conspersa
- Peak month
- May
- Records since 2000
- 5,775
- Group
- Caddisflies
Limnephilus marmoratus
- Peak month
- August
- Records since 2000
- 5,591
- Group
- Caddisflies
Hydropsyche angustipennis
- Peak month
- October
- Records since 2000
- 5,560
- Group
- Caddisflies
Medium Sedge
- Peak month
- May
- Records since 2000
- 5,472
- Scientific name
- Goera pilosa
Large Cinnamon Sedge
- Peak month
- April
- Records since 2000
- 5,444
- Scientific name
- Potamophylax latipennis
Drusus annulatus
- Peak month
- April
- Records since 2000
- 5,337
- Group
- Caddisflies
Chaetopteryx villosa
- Peak month
- May
- Records since 2000
- 5,313
- Group
- Caddisflies
Limnephilus auricula
- Peak month
- May
- Records since 2000
- 4,503
- Group
- Caddisflies
Hydropsyche instabilis
- Peak month
- April
- Records since 2000
- 4,225
- Group
- Caddisflies
Molanna angustata
- Peak month
- August
- Records since 2000
- 3,802
- Group
- Caddisflies
Limnephilus flavicornis
- Peak month
- September
- Records since 2000
- 3,589
- Group
- Caddisflies
Brown sedge
- Peak month
- May
- Records since 2000
- 3,323
- Scientific name
- Anabolia nervosa
Lype reducta
- Peak month
- October
- Records since 2000
- 2,979
- Group
- Caddisflies
Potamophylax cingulatus
- Peak month
- April
- Records since 2000
- 2,887
- Group
- Caddisflies
Yellow spotted sedge
- Peak month
- May
- Records since 2000
- 2,862
- Scientific name
- Philopotamus montanus
Athripsodes aterrimus
- Peak month
- July
- Records since 2000
- 2,803
- Group
- Caddisflies
Stenophylax sequax
- Peak month
- March
- Records since 2000
- 2,714
- Group
- Caddisflies
Limnephilus affinis
- Peak month
- May
- Records since 2000
- 2,681
- Group
- Caddisflies
Small Yellow Sedge
- Peak month
- May
- Records since 2000
- 2,644
- Scientific name
- Psychomyia pusilla
Stenophylax permistus
- Peak month
- April
- Records since 2000
- 2,423
- Group
- Caddisflies
Halesus digitatus
- Peak month
- April
- Records since 2000
- 2,398
- Group
- Caddisflies
Glossosoma boltoni
- Peak month
- September
- Records since 2000
- 2,394
- Group
- Caddisflies
Silo nigricornis
- Peak month
- October
- Records since 2000
- 2,271
- Group
- Caddisflies
Athripsodes bilineatus
- Peak month
- May
- Records since 2000
- 2,250
- Group
- Caddisflies
Athripsodes albifrons
- Peak month
- July
- Records since 2000
- 2,196
- Group
- Caddisflies
Oecetis ochracea
- Peak month
- July
- Records since 2000
- 2,139
- Group
- Caddisflies
Leptocerus tineiformis
- Peak month
- July
- Records since 2000
- 2,127
- Group
- Caddisflies
Limnephilus sparsus
- Peak month
- May
- Records since 2000
- 2,118
- Group
- Caddisflies
Polycentropus kingi
- Peak month
- September
- Records since 2000
- 2,005
- Group
- Caddisflies
Cyrnus trimaculatus
- Peak month
- July
- Records since 2000
- 1,958
- Group
- Caddisflies
Diamond Northern Caddisfly
- Peak month
- August
- Records since 2000
- 1,762
- Scientific name
- Limnephilus rhombicus