Common Maërl
- Group
- Seaweeds and algae
- Records since 2000
- 2,671
- Scientific name
- Phymatolithon calcareum
Amphora pediculus
- Group
- Seaweeds and algae
- Records since 2000
- 2,661
- Peak month
- September
Common elongated phoronid
- Group
- Other invertebrates
- Records since 2000
- 2,659
- Scientific name
- Phoronis muelleri
Juniper Shieldbug
- Group
- True bugs
- Records since 2000
- 2,649
- Scientific name
- Cyphostethus tristriatus
Pseudosmittia trilobata
- Group
- True flies
- Records since 2000
- 2,646
- Peak month
- September
Marble Gall
- Group
- Bees, wasps and ants
- Records since 2000
- 2,642
- Scientific name
- Andricus kollari
Sowbread
- Group
- Flowering plants
- Records since 2000
- 2,623
- Scientific name
- Cyclamen hederifolium
Hairy Whirligig
- Group
- Beetles
- Records since 2000
- 2,611
- Scientific name
- Orectochilus villosus
Common Threadwort
- Group
- Liverworts
- Records since 2000
- 2,603
- Scientific name
- Cephaloziella divaricata
Barred Warbler
- Group
- Birds
- Records since 2000
- 2,598
- Scientific name
- Sylvia nisoria
Grove Earwort
- Group
- Liverworts
- Records since 2000
- 2,598
- Scientific name
- Scapania nemorea
Branching sponge
- Group
- Sponges
- Records since 2000
- 2,544
- Scientific name
- Axinella dissimilis
Apple of Peru
- Group
- Flowering plants
- Records since 2000
- 2,538
- Scientific name
- Nicandra physalodes
Hydroid
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 2,537
- Scientific name
- Clytia hemisphaerica
Sphaerosyllis bulbosa
- Group
- Worms (annelids)
- Records since 2000
- 2,526
- Peak month
- September
Three-spined stickleback
- Group
- Fish
- Records since 2000
- 2,526
- Scientific name
- Gasterosteus aculeatus
Many-forked Cladonia
- Group
- Lichens
- Records since 2000
- 2,510
- Scientific name
- Cladonia furcata
Greater Pipefish
- Group
- Fish
- Records since 2000
- 2,504
- Scientific name
- Syngnathus acus
Garden Rose Button
- Group
- Butterflies and moths
- Records since 2000
- 2,500
- Scientific name
- Acleris variegana
Floating Pennywort
- Group
- Flowering plants
- Records since 2000
- 2,498
- Scientific name
- Hydrocotyle ranunculoides
Chicken of The Woods
- Group
- Fungi
- Records since 2000
- 2,434
- Scientific name
- Laetiporus sulphureus
Aphelocheirus aestivalis
- Group
- True bugs
- Records since 2000
- 2,422
- Peak month
- September
Late Needle Fly
- Group
- Stoneflies
- Records since 2000
- 2,409
- Scientific name
- Leuctra fusca
Narrow-winged Grey
- Group
- Butterflies and moths
- Records since 2000
- 2,406
- Scientific name
- Eudonia angustea
Brook Lamprey
- Group
- Fish
- Records since 2000
- 2,399
- Scientific name
- Lampetra planeri
Glossosoma boltoni
- Group
- Caddisflies
- Records since 2000
- 2,394
- Peak month
- September
Turbot
- Group
- Fish
- Records since 2000
- 2,372
- Scientific name
- Scophthalmus maximus
Centre-barred Sallow
- Group
- Butterflies and moths
- Records since 2000
- 2,363
- Scientific name
- Atethmia centrago
Punctate Corixa
- Group
- True bugs
- Records since 2000
- 2,361
- Scientific name
- Corixa punctata
Tiny risso snail
- Group
- Molluscs
- Records since 2000
- 2,312
- Scientific name
- Rissoa parva
Blue rayed limpet
- Group
- Molluscs
- Records since 2000
- 2,309
- Scientific name
- Patella pellucida
Cut surfclam
- Group
- Molluscs
- Records since 2000
- 2,307
- Scientific name
- Spisula subtruncata
Synedra dissipata
- Group
- Seaweeds and algae
- Records since 2000
- 2,300
- Peak month
- September
Pepper Dulse
- Group
- Seaweeds and algae
- Records since 2000
- 2,286
- Scientific name
- Osmundea pinnatifida
Rough Violet Ground Beetle
- Group
- Beetles
- Records since 2000
- 2,265
- Scientific name
- Carabus problematicus
Montagu's Crab
- Group
- Crustaceans
- Records since 2000
- 2,259
- Scientific name
- Xantho hydrophilus
Great Spider Crab
- Group
- Crustaceans
- Records since 2000
- 2,252
- Scientific name
- Hyas araneus
Nitzschia palea
- Group
- Seaweeds and algae
- Records since 2000
- 2,250
- Peak month
- September
Achnanthes oblongella
- Group
- Seaweeds and algae
- Records since 2000
- 2,248
- Peak month
- September
Planothidium lanceolatum
- Group
- Seaweeds and algae
- Records since 2000
- 2,245
- Peak month
- September
Cocconeis euglypta
- Group
- Seaweeds and algae
- Records since 2000
- 2,218
- Peak month
- September
Twin-spot Centurion
- Group
- True flies
- Records since 2000
- 2,193
- Scientific name
- Sargus bipunctatus
Sabine's Gull
- Group
- Birds
- Records since 2000
- 2,159
- Scientific name
- Xema sabini
Reticulated Dragonet
- Group
- Fish
- Records since 2000
- 2,126
- Scientific name
- Callionymus reticulatus
Gomphonema intricatum
- Group
- Seaweeds and algae
- Records since 2000
- 2,121
- Peak month
- September
Powdered Trumpet Lichen
- Group
- Lichens
- Records since 2000
- 2,107
- Scientific name
- Cladonia fimbriata
Callicorixa praeusta
- Group
- True bugs
- Records since 2000
- 2,085
- Peak month
- September
Planothidium frequentissimum
- Group
- Seaweeds and algae
- Records since 2000
- 2,083
- Peak month
- September