Curled Dock
- Group
- Flowering plants
- Records since 2000
- 10,374
- Scientific name
- Rumex crispus
Scarce Chaser
- Group
- Dragonflies and damselflies
- Records since 2000
- 10,319
- Scientific name
- Libellula fulva
Dogwood
- Group
- Flowering plants
- Records since 2000
- 10,200
- Scientific name
- Cornus sanguinea
Grousewing Caddisfly
- Group
- Caddisflies
- Records since 2000
- 10,051
- Scientific name
- Mystacides longicornis
Field Horsetail
- Group
- Ferns and horsetails
- Records since 2000
- 9,954
- Scientific name
- Equisetum arvense
Mountain Argus
- Group
- Butterflies and moths
- Records since 2000
- 9,928
- Scientific name
- Aricia artaxerxes
Hemlock Water-dropwort
- Group
- Flowering plants
- Records since 2000
- 9,856
- Scientific name
- Oenanthe crocata
Brown-toed Forest Fly
- Group
- True flies
- Records since 2000
- 9,719
- Scientific name
- Xylota segnis
Yellow-rattle
- Group
- Flowering plants
- Records since 2000
- 9,710
- Scientific name
- Rhinanthus minor
Lesser Trefoil
- Group
- Flowering plants
- Records since 2000
- 9,703
- Scientific name
- Trifolium dubium
Common Sunstar
- Group
- Starfish and sea urchins
- Records since 2000
- 9,661
- Scientific name
- Crossaster papposus
Lesser Stitchwort
- Group
- Flowering plants
- Records since 2000
- 9,336
- Scientific name
- Stellaria graminea
Variable Damselfly
- Group
- Dragonflies and damselflies
- Records since 2000
- 9,278
- Scientific name
- Coenagrion pulchellum
Southern Damselfly
- Group
- Dragonflies and damselflies
- Records since 2000
- 9,257
- Scientific name
- Coenagrion mercuriale
Migrant Hover Fly
- Group
- True flies
- Records since 2000
- 9,218
- Scientific name
- Eupeodes corollae
Goniada maculata
- Group
- Worms (annelids)
- Records since 2000
- 8,988
- Peak month
- June
Garden Carpet
- Group
- Butterflies and moths
- Records since 2000
- 8,898
- Scientific name
- Xanthorhoe fluctuata
Greater Bulb-fly
- Group
- True flies
- Records since 2000
- 8,814
- Scientific name
- Merodon equestris
Common Mallow
- Group
- Flowering plants
- Records since 2000
- 8,810
- Scientific name
- Malva sylvestris
Diplocirrus glaucus
- Group
- Worms (annelids)
- Records since 2000
- 8,807
- Peak month
- June
White Catworm
- Group
- Worms (annelids)
- Records since 2000
- 8,630
- Scientific name
- Nephtys cirrosa
Shiny nut clam
- Group
- Molluscs
- Records since 2000
- 8,606
- Scientific name
- Nucula nitidosa
Black Snipefly
- Group
- True flies
- Records since 2000
- 8,496
- Scientific name
- Chrysopilus cristatus
Eurasian Nightjar
- Group
- Birds
- Records since 2000
- 8,474
- Scientific name
- Caprimulgus europaeus
Common Cottongrass
- Group
- Flowering plants
- Records since 2000
- 8,473
- Scientific name
- Eriophorum angustifolium
Vestal Cuckoo Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 8,401
- Scientific name
- Bombus vestalis
Common Basket-shell
- Group
- Molluscs
- Records since 2000
- 8,339
- Scientific name
- Varicorbula gibba
Straw Dot
- Group
- Butterflies and moths
- Records since 2000
- 8,320
- Scientific name
- Rivula sericealis
Hedge Mustard
- Group
- Flowering plants
- Records since 2000
- 8,158
- Scientific name
- Sisymbrium officinale
Serpent star
- Group
- Starfish and sea urchins
- Records since 2000
- 8,093
- Scientific name
- Ophiura ophiura
Common Marble
- Group
- Butterflies and moths
- Records since 2000
- 8,079
- Scientific name
- Syricoris lacunana
Lamarck's Christmas Tree Worm
- Group
- Worms (annelids)
- Records since 2000
- 8,023
- Scientific name
- Spirobranchus lamarcki
Buff ermine
- Group
- Butterflies and moths
- Records since 2000
- 7,977
- Scientific name
- Spilarctia lutea
Peacock Worm
- Group
- Worms (annelids)
- Records since 2000
- 7,900
- Scientific name
- Sabella pavonina
Melinna palmata
- Group
- Worms (annelids)
- Records since 2000
- 7,885
- Peak month
- June
Feverfew
- Group
- Flowering plants
- Records since 2000
- 7,779
- Scientific name
- Tanacetum parthenium
Poplar Hawk-moth
- Group
- Butterflies and moths
- Records since 2000
- 7,723
- Scientific name
- Laothoe populi
Sweet Chestnut
- Group
- Flowering plants
- Records since 2000
- 7,703
- Scientific name
- Castanea sativa
Hard-fern
- Group
- Ferns and horsetails
- Records since 2000
- 7,697
- Scientific name
- Struthiopteris spicant
Oaten Pipes Hydroid
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 7,697
- Scientific name
- Tubularia indivisa
Dog-rose
- Group
- Flowering plants
- Records since 2000
- 7,677
- Scientific name
- Rosa canina
An acorn barnacle
- Group
- Crustaceans
- Records since 2000
- 7,641
- Scientific name
- Balanus crenatus
Light Emerald
- Group
- Butterflies and moths
- Records since 2000
- 7,541
- Scientific name
- Campaea margaritaria
Chaetozone setosa
- Group
- Worms (annelids)
- Records since 2000
- 7,513
- Peak month
- June
Phacelia
- Group
- Flowering plants
- Records since 2000
- 7,497
- Scientific name
- Phacelia tanacetifolia
Light Bulb Tunicate
- Group
- Sea squirts
- Records since 2000
- 7,424
- Scientific name
- Clavelina lepadiformis
Transparent Razor
- Group
- Molluscs
- Records since 2000
- 7,406
- Scientific name
- Phaxas pellucidus
Glaucous Sedge
- Group
- Flowering plants
- Records since 2000
- 7,387
- Scientific name
- Carex flacca