Parexogone hebes
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 5,336
Described in 1884
29 species
Caenis rivulorum
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 2,004
Entomobrya intermedia
- Group
- Springtails
- Peak month
- February
- Records since 2000
- 1,503
Staph aureus
- Group
- Microorganisms and protists
- Peak month
- June
- Records since 2000
- 1,253
Minute pirate bug
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 766
Lysilla nivea
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 621
Parougia caeca
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 541
Agapetus delicatulus
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 522
Paraonis fulgens
- Group
- Worms (annelids)
- Peak month
- September
- Records since 2000
- 519
Escharina johnstoni
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 452
Cis bilamellatus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 448
Flat-backed millipede
- Group
- Millipedes
- Peak month
- June
- Records since 2000
- 305
Bimastos eiseni
- Group
- Worms (annelids)
- Peak month
- November
- Records since 2000
- 278
Enochrus fuscipennis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 265
Leptocerus lusitanicus
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 178
Hydropsyche saxonica
- Group
- Caddisflies
- Peak month
- October
- Records since 2000
- 167
Aclastus solutus
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 156
Spirorbis tridentatus
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 129
Julus scandinavius
- Group
- Millipedes
- Peak month
- June
- Records since 2000
- 124
Polycelis tenuis
- Group
- Flatworms
- Peak month
- April
- Records since 2000
- 111
Phygadeuon trichops
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 102
Caenis robusta
- Group
- Mayflies
- Peak month
- May
- Records since 2000
- 97
Atlantic Gymnast
- Group
- Fish
- Peak month
- September
- Records since 2000
- 96
Nomada hirtipes
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 81
Brachydesmus superus
- Group
- Millipedes
- Peak month
- April
- Records since 2000
- 75
Leptoiulus belgicus
- Group
- Millipedes
- Peak month
- June
- Records since 2000
- 64
Dichrogaster longicaudata
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 60
Proclea graffii
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 57
Stenus umbratilis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 57