Thorn cladonia
- Group
- Lichens
- Records since 2000
- 2,030
- Scientific name
- Cladonia uncialis
Black-poplar
- Group
- Flowering plants
- Records since 2000
- 2,002
- Scientific name
- Populus nigra
Canadian Fleabane
- Group
- Flowering plants
- Records since 2000
- 1,998
- Scientific name
- Erigeron canadensis
Pale Straw Pearl
- Group
- Butterflies and moths
- Records since 2000
- 1,997
- Scientific name
- Udea lutealis
Rock Samphire
- Group
- Flowering plants
- Records since 2000
- 1,995
- Scientific name
- Crithmum maritimum
Conops quadrifasciatus
- Group
- True flies
- Records since 2000
- 1,991
- Peak month
- August
Helophilus hybridus
- Group
- True flies
- Records since 2000
- 1,985
- Peak month
- August
Carline Thistle
- Group
- Flowering plants
- Records since 2000
- 1,937
- Scientific name
- Carlina vulgaris
Dipolydora flava
- Group
- Worms (annelids)
- Records since 2000
- 1,935
- Peak month
- August
Large Tiger Hoverfly
- Group
- True flies
- Records since 2000
- 1,933
- Scientific name
- Helophilus trivittatus
Sea Oak
- Group
- Seaweeds and algae
- Records since 2000
- 1,927
- Scientific name
- Phycodrys rubens
Amphioxus
- Group
- Other chordates
- Records since 2000
- 1,918
- Scientific name
- Branchiostoma lanceolatum
Narrow-leaved hornwrack
- Group
- Bryozoans
- Records since 2000
- 1,913
- Scientific name
- Securiflustra securifrons
Sclerocheilus minutus
- Group
- Worms (annelids)
- Records since 2000
- 1,912
- Peak month
- August
Gutweed
- Group
- Seaweeds and algae
- Records since 2000
- 1,902
- Scientific name
- Ulva intestinalis
Dwarf Eel-grass
- Group
- Flowering plants
- Records since 2000
- 1,892
- Scientific name
- Zostera noltii
Formica lemani
- Group
- Bees, wasps and ants
- Records since 2000
- 1,879
- Peak month
- August
Mouse Moth
- Group
- Butterflies and moths
- Records since 2000
- 1,878
- Scientific name
- Amphipyra tragopoginis
Porella concinna
- Group
- Bryozoans
- Records since 2000
- 1,876
- Peak month
- August
Common Flat Periwinkle
- Group
- Molluscs
- Records since 2000
- 1,870
- Scientific name
- Littorina obtusata
Greater Pond-sedge
- Group
- Flowering plants
- Records since 2000
- 1,868
- Scientific name
- Carex riparia
Rinodina oleae
- Group
- Lichens
- Records since 2000
- 1,868
- Peak month
- August
Golden Argent
- Group
- Butterflies and moths
- Records since 2000
- 1,855
- Scientific name
- Argyresthia goedartella
Cory's Shearwater
- Group
- Birds
- Records since 2000
- 1,854
- Scientific name
- Calonectris diomedea
Rush Veneer
- Group
- Butterflies and moths
- Records since 2000
- 1,851
- Scientific name
- Nomophila noctuella
Leafhopper
- Group
- True bugs
- Records since 2000
- 1,840
- Scientific name
- Eupteryx aurata
Asclerocheilus intermedius
- Group
- Worms (annelids)
- Records since 2000
- 1,822
- Peak month
- August
Common Orache
- Group
- Flowering plants
- Records since 2000
- 1,820
- Scientific name
- Atriplex patula
Common sawfly
- Group
- Bees, wasps and ants
- Records since 2000
- 1,810
- Scientific name
- Pontania proxima
Devil's Tooth
- Group
- Fungi
- Records since 2000
- 1,809
- Scientific name
- Hydnellum peckii
Odontosyllis gibba
- Group
- Worms (annelids)
- Records since 2000
- 1,800
- Peak month
- August
Tar Lichen
- Group
- Fungi
- Records since 2000
- 1,792
- Scientific name
- Hydropunctaria maura
Sea Lettuce
- Group
- Seaweeds and algae
- Records since 2000
- 1,776
- Scientific name
- Ulva fenestrata
Field Digger Wasp
- Group
- Bees, wasps and ants
- Records since 2000
- 1,763
- Scientific name
- Mellinus arvensis
Thongweed
- Group
- Seaweeds and algae
- Records since 2000
- 1,763
- Scientific name
- Himanthalia elongata
Diamond Northern Caddisfly
- Group
- Caddisflies
- Records since 2000
- 1,762
- Scientific name
- Limnephilus rhombicus
Garden Pebble
- Group
- Butterflies and moths
- Records since 2000
- 1,748
- Scientific name
- Evergestis forficalis
Cloak Anemone
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 1,740
- Scientific name
- Calliactis palliata
Common Rose Fusehorn
- Group
- Bees, wasps and ants
- Records since 2000
- 1,740
- Scientific name
- Arge pagana
Netted wing weed
- Group
- Seaweeds and algae
- Records since 2000
- 1,727
- Scientific name
- Dictyopteris polypodioides
Least weasel
- Group
- Mammals
- Records since 2000
- 1,725
- Scientific name
- Mustela nivalis
Blunt-flowered Rush
- Group
- Flowering plants
- Records since 2000
- 1,718
- Scientific name
- Juncus subnodulosus
Didemnum maculosum
- Group
- Sea squirts
- Records since 2000
- 1,713
- Peak month
- August
Phosphorescent Sea Pen
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 1,709
- Scientific name
- Pennatula phosphorea
Boreal Carrion Beetle
- Group
- Beetles
- Records since 2000
- 1,707
- Scientific name
- Nicrophorus vespilloides
Stag's-horn Sumach
- Group
- Flowering plants
- Records since 2000
- 1,697
- Scientific name
- Rhus typhina
Hairy-brome
- Group
- Flowering plants
- Records since 2000
- 1,695
- Scientific name
- Bromus ramosus
Long-legged Spider Crab
- Group
- Crustaceans
- Records since 2000
- 1,693
- Scientific name
- Macropodia rostrata