Athalia cordata
- Group
- Bees, wasps and ants
- Records since 2000
- 887
- Peak month
- August
Serotine Bat
- Group
- Mammals
- Records since 2000
- 884
- Scientific name
- Eptesicus serotinus
Heather Ladybird
- Group
- Beetles
- Records since 2000
- 883
- Scientific name
- Chilocorus bipustulatus
Bowerbank's Halichondria
- Group
- Sponges
- Records since 2000
- 882
- Scientific name
- Halichondria bowerbanki
Foxglove-tree
- Group
- Flowering plants
- Records since 2000
- 879
- Scientific name
- Paulownia tomentosa
Sarcophaga subvicina
- Group
- True flies
- Records since 2000
- 870
- Peak month
- August
Doll Eualid
- Group
- Crustaceans
- Records since 2000
- 869
- Scientific name
- Eualus pusiolus
Glossy Buckthorn
- Group
- Flowering plants
- Records since 2000
- 868
- Scientific name
- Frangula alnus
False Agardhiela
- Group
- Seaweeds and algae
- Records since 2000
- 865
- Scientific name
- Gracilaria gracilis
Lumbrineris latreilli
- Group
- Worms (annelids)
- Records since 2000
- 864
- Peak month
- August
Barred Grass-veneer
- Group
- Butterflies and moths
- Records since 2000
- 863
- Scientific name
- Agriphila inquinatella
Solicoccozyma terricola
- Group
- Fungi
- Records since 2000
- 863
- Peak month
- August
Phyllophora crispa
- Group
- Seaweeds and algae
- Records since 2000
- 862
- Peak month
- August
Green Sea Fern
- Group
- Seaweeds and algae
- Records since 2000
- 860
- Scientific name
- Bryopsis plumosa
Polycirrus plumosus
- Group
- Worms (annelids)
- Records since 2000
- 860
- Peak month
- August
Rosy Starfish
- Group
- Starfish and sea urchins
- Records since 2000
- 858
- Scientific name
- Stichastrella rosea
Red Hornweed
- Group
- Seaweeds and algae
- Records since 2000
- 857
- Scientific name
- Ceramium virgatum
Chamaeleon prawn
- Group
- Crustaceans
- Records since 2000
- 851
- Scientific name
- Hippolyte varians
Milk-parsley
- Group
- Flowering plants
- Records since 2000
- 850
- Scientific name
- Thysselinum palustre
Common Saltmarsh-grass
- Group
- Flowering plants
- Records since 2000
- 847
- Scientific name
- Puccinellia maritima
Oncousoecia dilatans
- Group
- Bryozoans
- Records since 2000
- 844
- Peak month
- August
Pedicia rivosa
- Group
- True flies
- Records since 2000
- 843
- Peak month
- August
Ithytrichia lamellaris
- Group
- Caddisflies
- Records since 2000
- 842
- Peak month
- August
Shiny Glass Snail
- Group
- Molluscs
- Records since 2000
- 839
- Scientific name
- Zonitoides nitidus
Arrowhead
- Group
- Flowering plants
- Records since 2000
- 838
- Scientific name
- Sagittaria sagittifolia
Canadian Goldenrod
- Group
- Flowering plants
- Records since 2000
- 835
- Scientific name
- Solidago canadensis
Chirosia grossicauda
- Group
- True flies
- Records since 2000
- 835
- Peak month
- August
Treble Bar
- Group
- Butterflies and moths
- Records since 2000
- 834
- Scientific name
- Aplocera plagiata
Marsh-mallow
- Group
- Flowering plants
- Records since 2000
- 831
- Scientific name
- Althaea officinalis
Russian Vine
- Group
- Flowering plants
- Records since 2000
- 830
- Scientific name
- Fallopia baldschuanica
Lesser Bulrush
- Group
- Flowering plants
- Records since 2000
- 827
- Scientific name
- Typha angustifolia
Fennel Pondweed
- Group
- Flowering plants
- Records since 2000
- 825
- Scientific name
- Stuckenia pectinata
Hemilepton nitidum
- Group
- Molluscs
- Records since 2000
- 825
- Peak month
- August
Wilson's Storm-Petrel
- Group
- Birds
- Records since 2000
- 825
- Scientific name
- Oceanites oceanicus
Greater sand-eel, Courbin's Sandeel
- Group
- Fish
- Records since 2000
- 823
- Scientific name
- Hyperoplus immaculatus
Kallymenia reniformis
- Group
- Seaweeds and algae
- Records since 2000
- 823
- Peak month
- August
Chondria dasyphylla
- Group
- Seaweeds and algae
- Records since 2000
- 819
- Peak month
- August
Fatfoot Pocket-moss
- Group
- Mosses
- Records since 2000
- 817
- Scientific name
- Fissidens crassipes
Hoary Mustard
- Group
- Flowering plants
- Records since 2000
- 814
- Scientific name
- Hirschfeldia incana
Conilera cylindracea
- Group
- Crustaceans
- Records since 2000
- 813
- Peak month
- August
Megaselia sp. BOLD:ACX6055
- Group
- True flies
- Records since 2000
- 808
- Peak month
- August
Spiked Water-milfoil
- Group
- Flowering plants
- Records since 2000
- 805
- Scientific name
- Myriophyllum spicatum
Alfalfa plant bug
- Group
- True bugs
- Records since 2000
- 802
- Scientific name
- Adelphocoris lineolatus
Callipallene brevirostris
- Group
- Other invertebrates
- Records since 2000
- 801
- Peak month
- August
Red-flanked Scymnus
- Group
- Beetles
- Records since 2000
- 800
- Scientific name
- Scymnus interruptus
Flabby bristle-worm
- Group
- Worms (annelids)
- Records since 2000
- 799
- Scientific name
- Flabelligera affinis
Calathus rotundicollis
- Group
- Beetles
- Records since 2000
- 798
- Peak month
- August
Bird cherry-oat aphid
- Group
- True bugs
- Records since 2000
- 796
- Scientific name
- Rhopalosiphum padi