Devonshire Cup-coral
- Group
- Jellyfish, corals and anemones
- Peak month
- July
- Records since 2000
- 12,047
Described in 1828
92 species
Brooding snake star
- Group
- Starfish and sea urchins
- Peak month
- August
- Records since 2000
- 11,766
Reddish snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 8,969
Escharella immersa
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 5,289
Disporella hispida
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 3,873
Eunice vittata
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 2,458
Eupolymnia nesidensis
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 2,307
Gammaropsis maculata
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 2,202
Toothed Pondskater
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 1,785
Schistomeringos rudolphi
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 1,758
Agonum thoreyi
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 1,538
Snailfur
- Group
- Jellyfish, corals and anemones
- Peak month
- September
- Records since 2000
- 1,303
Black-browed Albatross
- Group
- Birds
- Peak month
- July
- Records since 2000
- 1,088
Dark Groundling
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 1,080
Alcyonidium parasiticum
- Group
- Bryozoans
- Peak month
- July
- Records since 2000
- 1,022
Hastings riverbank ground beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 996
Montagu's Topshell
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 954
Bordered Carl
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 942
Bembidion atrocaeruleum
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 926
House Groundling
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 905
Common Oak Purple
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 800
Calathus rotundicollis
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 798
Garden Cosmet
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 744
Common Cloaked Shoot
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 722
Pyripora catenularia
- Group
- Bryozoans
- Peak month
- May
- Records since 2000
- 652
Ilybius montanus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 602
Orange Crest
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 592
Amara convexior
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 575
Alcyonidium hirsutum
- Group
- Bryozoans
- Peak month
- June
- Records since 2000
- 510
Silvery Leaf-cutter Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 499
Paraswammerdamia lutarea
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 400
Streptanus sordidus
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 374
European Birch Aphid
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 373
Tinea semifulvella
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 329
Phyllonorycter tristrigella
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 327
Haliplus confinis
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 324
Anopheles plumbeus
- Group
- True flies
- Peak month
- August
- Records since 2000
- 317
Macustus grisescens
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 308
Ophonus puncticeps
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 289
Caloptilia semifascia
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 278
Bradycellus ruficollis
- Group
- Beetles
- Peak month
- March
- Records since 2000
- 266
Capua vulgana
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 244
Teleiopsis diffinis
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 212
Apseudopsis latreillii
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 210
White-Sided Dolphin
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 208
Rhantus suturellus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 196
Harpalus attenuatus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 195
Argyresthia albistria
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 190
Nemapogon cloacella
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 183
Incurvaria pectinea
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 181
Dolichopus latilimbatus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 173
Trypoxylon clavicerum
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 171
Ethmia dodecea
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 167
Batrachedra praeangusta
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 163
Hedya ochroleucana
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 158
Pterostichus gracilis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 155
Coleophora albicosta
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 147
Craspedolepta nebulosa
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 146
Aporrhais serresiana
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 144
Yellow skirt slug
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 143
Notus flavipennis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 133
Anteon fulviventre
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 132
Hercostomus nigrilamellatus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 130
Platyedra subcinerea
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 125
Flame Wainscot
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 124
Thamnotettix confinis
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 123
Diogenes pugilator
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 122
Phyllonorycter trifasciella
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 118
Perizoma minorata
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 117
Elymana sulphurella
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 116
Rhamphomyia stigmosa
- Group
- True flies
- Peak month
- May
- Records since 2000
- 101
Rough-toothed dolphin
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 100
Hercostomus nanus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 94
Saltmarsh Short-spur
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 94
Dun Sentinel
- Group
- Molluscs
- Peak month
- October
- Records since 2000
- 90
Sei Whale
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 90
Wall Mason Bee
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 85
Elachista consortella
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 84
Elachista rufocinerea
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 84
Duvaucelia plebeia
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 80
Hydroporus scalesianus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 78
Lamprochromus bifasciatus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 78
Argyresthia semifusca
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 76
Long-beaked Dolphin
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 76
Bulwer's Petrel
- Group
- Birds
- Peak month
- October
- Records since 2000
- 74
Agonum nigrum
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 69
Dentated pug
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 69
Hygrotus quinquelineatus
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 65
Nereiphylla paretti
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 62
Stenolophus skrimshiranus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 61
Forcipata citrinella
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 57
Coleophora lineolea
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 53