Emperor dragonfly
- Group
- Dragonflies and damselflies
- Peak month
- July
- Records since 2000
- 93,185
Described in 1815
33 species
Common Field Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 20,577
Tundra Swan
- Group
- Birds
- Peak month
- January
- Records since 2000
- 9,716
Pomarine Jaeger
- Group
- Birds
- Peak month
- September
- Records since 2000
- 4,520
Prideaux's hermit crab
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 2,791
Mottled Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 2,707
Massive horny sponge
- Group
- Sponges
- Peak month
- May
- Records since 2000
- 2,650
Neptune's Heart Sea Squirt
- Group
- Sea squirts
- Peak month
- July
- Records since 2000
- 1,825
Bonaparte's Gull
- Group
- Birds
- Peak month
- July
- Records since 2000
- 1,770
Candy Stripe Flatworm
- Group
- Flatworms
- Peak month
- July
- Records since 2000
- 1,494
Arctic Lyre Crab
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 1,353
Ring-billed Gull
- Group
- Birds
- Peak month
- January
- Records since 2000
- 1,313
White-winged Tern
- Group
- Birds
- Peak month
- August
- Records since 2000
- 1,194
Drapetis ephippiata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 1,075
European dog tick
- Group
- Mites, harvestmen and other arachnids
- Peak month
- June
- Records since 2000
- 797
Convex Lantern-shell
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 630
Ringed Tigress
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 557
Oestergrenia digitata
- Group
- Starfish and sea urchins
- Peak month
- May
- Records since 2000
- 451
Paykullia maculata
- Group
- True flies
- Peak month
- August
- Records since 2000
- 363
Athalia lugens
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 235
A stalked jellyfish
- Group
- Jellyfish, corals and anemones
- Peak month
- September
- Records since 2000
- 217
Platypalpus candicans
- Group
- True flies
- Peak month
- June
- Records since 2000
- 206
Processa canaliculata
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 200
Stilpon graminum
- Group
- True flies
- Peak month
- June
- Records since 2000
- 191
Neomysis integer
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 164
Collared Flycatcher
- Group
- Birds
- Peak month
- May
- Records since 2000
- 127
Athalia liberta
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 115
Geophilus carpophagus
- Group
- Centipedes
- Peak month
- October
- Records since 2000
- 111
Elenchus tenuicornis
- Group
- Other insects
- Peak month
- August
- Records since 2000
- 102
Aptesis nigrocincta
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 92
Cylindroiulus londinensis
- Group
- Millipedes
- Peak month
- March
- Records since 2000
- 84
Platypalpus pectoralis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 72
Litophasia hyalipennis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 60