Early Thorn
- Group
- Butterflies and moths
- Records since 2000
- 4,182
- Scientific name
- Selenia dentaria
Pink Sea Fan
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 4,164
- Scientific name
- Eunicella verrucosa
Transparent Fork-moss
- Group
- Mosses
- Records since 2000
- 4,163
- Scientific name
- Dichodontium pellucidum
Flagellate Feather-moss
- Group
- Mosses
- Records since 2000
- 4,162
- Scientific name
- Hyocomium armoricum
Common Duckweed
- Group
- Flowering plants
- Records since 2000
- 4,152
- Scientific name
- Lemna minor
Common Orange Legionnaire
- Group
- True flies
- Records since 2000
- 4,139
- Scientific name
- Beris vallata
Small Fan-footed Wave
- Group
- Butterflies and moths
- Records since 2000
- 4,131
- Scientific name
- Idaea biselata
Scarce Footman
- Group
- Butterflies and moths
- Records since 2000
- 4,122
- Scientific name
- Manulea complana
American Willowherb
- Group
- Flowering plants
- Records since 2000
- 4,092
- Scientific name
- Epilobium ciliatum
Variable Crisp-moss
- Group
- Mosses
- Records since 2000
- 4,091
- Scientific name
- Trichostomum brachydontium
Elongate abra
- Group
- Molluscs
- Records since 2000
- 4,086
- Scientific name
- Abra prismatica
Plant bug
- Group
- True bugs
- Records since 2000
- 4,070
- Scientific name
- Deraeocoris ruber
Knot Grass [moth]
- Group
- Butterflies and moths
- Records since 2000
- 4,052
- Scientific name
- Acronicta rumicis
Roseate Tern
- Group
- Birds
- Records since 2000
- 4,046
- Scientific name
- Sterna dougallii
Betony
- Group
- Flowering plants
- Records since 2000
- 4,042
- Scientific name
- Betonica officinalis
Nut-tree Tussock
- Group
- Butterflies and moths
- Records since 2000
- 4,012
- Scientific name
- Colocasia coryli
Marsh Pennywort
- Group
- Flowering plants
- Records since 2000
- 4,010
- Scientific name
- Hydrocotyle vulgaris
Common Valerian
- Group
- Flowering plants
- Records since 2000
- 3,992
- Scientific name
- Valeriana officinalis
Giant-rhubarb
- Group
- Flowering plants
- Records since 2000
- 3,983
- Scientific name
- Gunnera tinctoria
Inlaid Grass-veneer
- Group
- Butterflies and moths
- Records since 2000
- 3,963
- Scientific name
- Crambus pascuella
Green leafhopper
- Group
- True bugs
- Records since 2000
- 3,954
- Scientific name
- Cicadella viridis
Blunt Gaper
- Group
- Molluscs
- Records since 2000
- 3,945
- Scientific name
- Mya truncata
Garden Privet
- Group
- Flowering plants
- Records since 2000
- 3,921
- Scientific name
- Ligustrum ovalifolium
Common Pollen Beetle
- Group
- Beetles
- Records since 2000
- 3,918
- Scientific name
- Brassicogethes aeneus
Rosy Tabby
- Group
- Butterflies and moths
- Records since 2000
- 3,822
- Scientific name
- Endotricha flammealis
Tripos fusus
- Group
- Microorganisms and protists
- Records since 2000
- 3,786
- Peak month
- July
Upright Hedge-parsley
- Group
- Flowering plants
- Records since 2000
- 3,778
- Scientific name
- Torilis japonica
Notched Rustwort
- Group
- Liverworts
- Records since 2000
- 3,769
- Scientific name
- Marsupella emarginata
Rustic
- Group
- Butterflies and moths
- Records since 2000
- 3,742
- Scientific name
- Hoplodrina blanda
Hydroporus palustris
- Group
- Beetles
- Records since 2000
- 3,690
- Peak month
- July
Lulworth Skipper
- Group
- Butterflies and moths
- Records since 2000
- 3,689
- Scientific name
- Thymelicus acteon
Elliptic trough shell
- Group
- Molluscs
- Records since 2000
- 3,679
- Scientific name
- Spisula elliptica
European Alder Spittlebug
- Group
- True bugs
- Records since 2000
- 3,678
- Scientific name
- Aphrophora alni
Water Forget-me-not
- Group
- Flowering plants
- Records since 2000
- 3,657
- Scientific name
- Myosotis scorpioides
Sea spider
- Group
- Other invertebrates
- Records since 2000
- 3,655
- Scientific name
- Anoplodactylus petiolatus
Strawberry Harp Ground Beetle
- Group
- Beetles
- Records since 2000
- 3,630
- Scientific name
- Harpalus rufipes
Slender St John's-wort
- Group
- Flowering plants
- Records since 2000
- 3,625
- Scientific name
- Hypericum pulchrum
Velvet Bent
- Group
- Flowering plants
- Records since 2000
- 3,598
- Scientific name
- Agrostis canina
Hylemya vagans
- Group
- True flies
- Records since 2000
- 3,581
- Peak month
- July
Marsh Willowherb
- Group
- Flowering plants
- Records since 2000
- 3,567
- Scientific name
- Epilobium palustre
Tompot Blenny
- Group
- Fish
- Records since 2000
- 3,537
- Scientific name
- Parablennius gattorugine
Greater Knapweed
- Group
- Flowering plants
- Records since 2000
- 3,533
- Scientific name
- Centaurea scabiosa
Sun Spurge
- Group
- Flowering plants
- Records since 2000
- 3,518
- Scientific name
- Euphorbia helioscopia
Wild Basil
- Group
- Flowering plants
- Records since 2000
- 3,508
- Scientific name
- Clinopodium vulgare
White Stonecrop
- Group
- Flowering plants
- Records since 2000
- 3,501
- Scientific name
- Sedum album
Masked Crab
- Group
- Crustaceans
- Records since 2000
- 3,495
- Scientific name
- Corystes cassivelaunus
Water Horsetail
- Group
- Ferns and horsetails
- Records since 2000
- 3,492
- Scientific name
- Equisetum fluviatile
Slender Mining Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 3,485
- Scientific name
- Lasioglossum calceatum