Black Lichen
- Group
- Lichens
- Records since 2000
- 1,679
- Scientific name
- Lichina pygmaea
Fragilaria gracilis
- Group
- Seaweeds and algae
- Records since 2000
- 1,679
- Peak month
- September
Oak Mildew
- Group
- Fungi
- Records since 2000
- 1,679
- Scientific name
- Erysiphe alphitoides
Four-spotted Nephus
- Group
- Beetles
- Records since 2000
- 1,665
- Scientific name
- Nephus quadrimaculatus
Guernsey Fleabane
- Group
- Flowering plants
- Records since 2000
- 1,656
- Scientific name
- Erigeron sumatrensis
Volcano Barnacle
- Group
- Crustaceans
- Records since 2000
- 1,653
- Scientific name
- Perforatus perforatus
Witch's hair
- Group
- Seaweeds and algae
- Records since 2000
- 1,623
- Scientific name
- Desmarestia aculeata
Little Cuttlefish, Little Cuttle
- Group
- Molluscs
- Records since 2000
- 1,601
- Scientific name
- Sepiola atlantica
Chanterelle
- Group
- Fungi
- Records since 2000
- 1,593
- Scientific name
- Cantharellus cibarius
Greenhouse Slug
- Group
- Molluscs
- Records since 2000
- 1,591
- Scientific name
- Ambigolimax valentianus
Sweet Alison
- Group
- Flowering plants
- Records since 2000
- 1,587
- Scientific name
- Lobularia maritima
Charcoal Burner
- Group
- Fungi
- Records since 2000
- 1,585
- Scientific name
- Russula cyanoxantha
Warty Arion
- Group
- Molluscs
- Records since 2000
- 1,582
- Scientific name
- Arion owenii
Undulated False Lucine
- Group
- Molluscs
- Records since 2000
- 1,567
- Scientific name
- Mysia undata
European Tarnished Plant Bug
- Group
- True bugs
- Records since 2000
- 1,566
- Scientific name
- Lygus rugulipennis
Harpoon Weed
- Group
- Seaweeds and algae
- Records since 2000
- 1,543
- Scientific name
- Asparagopsis armata
Lobe Shell
- Group
- Molluscs
- Records since 2000
- 1,537
- Scientific name
- Philine quadripartita
Beefsteak Fungus
- Group
- Fungi
- Records since 2000
- 1,535
- Scientific name
- Fistulina hepatica
Paroligolophus agrestis
- Group
- Mites, harvestmen and other arachnids
- Records since 2000
- 1,522
- Peak month
- September
Giant Polypore
- Group
- Fungi
- Records since 2000
- 1,521
- Scientific name
- Meripilus giganteus
Chinese Mitten Crab
- Group
- Crustaceans
- Records since 2000
- 1,519
- Scientific name
- Eriocheir sinensis
Great snail-leech
- Group
- Worms (annelids)
- Records since 2000
- 1,516
- Scientific name
- Glossiphonia complanata
Southern green stink bug
- Group
- True bugs
- Records since 2000
- 1,512
- Scientific name
- Nezara viridula
Luidia sarsii
- Group
- Starfish and sea urchins
- Records since 2000
- 1,507
- Peak month
- September
Cocconeis lineata
- Group
- Seaweeds and algae
- Records since 2000
- 1,505
- Peak month
- September
Tawny Grisette
- Group
- Fungi
- Records since 2000
- 1,503
- Scientific name
- Amanita fulva
Autumnal Rustic
- Group
- Butterflies and moths
- Records since 2000
- 1,490
- Scientific name
- Eugnorisma glareosa
Speckled Sea Louse
- Group
- Crustaceans
- Records since 2000
- 1,485
- Scientific name
- Eurydice pulchra
Common Goby
- Group
- Fish
- Records since 2000
- 1,459
- Scientific name
- Pomatoschistus microps
Pontocrates arenarius
- Group
- Crustaceans
- Records since 2000
- 1,459
- Peak month
- September
Shagreen ray
- Group
- Fish
- Records since 2000
- 1,456
- Scientific name
- Leucoraja fullonica
Rough barnacle
- Group
- Crustaceans
- Records since 2000
- 1,451
- Scientific name
- Balanus balanus
Tabellaria flocculosa
- Group
- Seaweeds and algae
- Records since 2000
- 1,437
- Peak month
- September
Pallid Harrier
- Group
- Birds
- Records since 2000
- 1,426
- Scientific name
- Circus macrourus
Pink-barred Sallow
- Group
- Butterflies and moths
- Records since 2000
- 1,406
- Scientific name
- Xanthia togata
Vertebrata spec.
- Group
- Seaweeds and algae
- Records since 2000
- 1,406
- Peak month
- September
Lepidostoma basale
- Group
- Caddisflies
- Records since 2000
- 1,403
- Peak month
- September
Umbellifer Mildew
- Group
- Fungi
- Records since 2000
- 1,403
- Scientific name
- Erysiphe heraclei
Navicula tripunctata
- Group
- Seaweeds and algae
- Records since 2000
- 1,396
- Peak month
- September
Disc lichen
- Group
- Lichens
- Records since 2000
- 1,386
- Scientific name
- Buellia ocellata
Humpbacked minute scavenger beetle
- Group
- Beetles
- Records since 2000
- 1,376
- Scientific name
- Cartodere nodifer
Hollyberry Cotoneaster
- Group
- Flowering plants
- Records since 2000
- 1,368
- Scientific name
- Cotoneaster bullatus
Phryganea bipunctata
- Group
- Caddisflies
- Records since 2000
- 1,368
- Peak month
- September
Botrylloid
- Group
- Sea squirts
- Records since 2000
- 1,358
- Scientific name
- Botrylloides leachii
White tortoiseshell limpet
- Group
- Molluscs
- Records since 2000
- 1,355
- Scientific name
- Tectura virginea
Arctic Lyre Crab
- Group
- Crustaceans
- Records since 2000
- 1,353
- Scientific name
- Hyas coarctatus
Dor Beetle
- Group
- Beetles
- Records since 2000
- 1,352
- Scientific name
- Geotrupes stercorarius
Nebrioporus elegans
- Group
- Beetles
- Records since 2000
- 1,333
- Peak month
- September