Meadow Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 16,828
Described in 1821
32 species
Greenhouse Slug
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 1,591
Common bottlenose dolphin
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 1,558
Hippothoa divaricata
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 1,219
Sertularella gayi
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 1,190
Yellowish planthopper
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 1,092
Paris riverbank ground beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,041
European harp ground beetle
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 939
Three-toothed Moss Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 661
Woodland Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 562
Botrytis cinerea
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 540
Platyderus depressus
- Group
- Beetles
- Peak month
- March
- Records since 2000
- 353
Bembidion deletum
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 350
Ocys harpaloides
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 345
Illex illecebrosus
- Group
- Molluscs
- Peak month
- November
- Records since 2000
- 341
A water beetle
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 332
Stenus guttula
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 273
Leiostyla anglica
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 232
Stagnicola fuscus
- Group
- Molluscs
- Peak month
- December
- Records since 2000
- 207
Great Knot
- Group
- Birds
- Peak month
- June
- Records since 2000
- 174
A sea slug
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 148
Mocydiopsis attenuata
- Group
- True bugs
- Peak month
- August
- Records since 2000
- 131
Scarce Four-dot Pin-palp
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 128
Euides basilinea
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 127
Sharp-Tailed Sandpiper
- Group
- Birds
- Peak month
- August
- Records since 2000
- 118
Rockhopper beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 97
Mecinus collaris
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 84
Metopsia clypeata
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 79
Tachyerges stigma
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 77
Tadpole Physa
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 77
Harpalus neglectus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 76
Trichius gallicus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 53