Asterionella glacialis
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 1,214
Described in 1886
18 species
Rhizosolenia flaccida
- Group
- Seaweeds and algae
- Peak month
- June
- Records since 2000
- 668
Pseudolimnophila sepium
- Group
- True flies
- Peak month
- July
- Records since 2000
- 622
Euphylidorea meigenii
- Group
- True flies
- Peak month
- May
- Records since 2000
- 551
Dryops ernesti
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 246
Tenthredo brevicornis
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 187
Arcyria denudata
- Group
- Microorganisms and protists
- Peak month
- October
- Records since 2000
- 178
A Spider-hunting Wasp
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 163
Fecampia erythrocephala
- Group
- Flatworms
- Peak month
- June
- Records since 2000
- 160
Bugulina simplex
- Group
- Bryozoans
- Peak month
- July
- Records since 2000
- 100
Eurhadina loewii
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 94
Rivularia bullata
- Group
- Microorganisms and protists
- Peak month
- August
- Records since 2000
- 85
Dendrobaena veneta
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 79
Dicranomyia aquosa
- Group
- True flies
- Peak month
- June
- Records since 2000
- 65
Lilljeborg’s pea mussel
- Group
- Molluscs
- Peak month
- March
- Records since 2000
- 62
An anemone
- Group
- Jellyfish, corals and anemones
- Peak month
- March
- Records since 2000
- 61
Ethmodiscus punctiger
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 58
Oxyloma sarsii
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 54