Crangon allmanni
- Group
- Crustaceans
- Records since 2000
- 1,238
- Peak month
- August
Field Gentian
- Group
- Flowering plants
- Records since 2000
- 1,232
- Scientific name
- Gentianella campestris
Argentinian Vervain
- Group
- Flowering plants
- Records since 2000
- 1,231
- Scientific name
- Verbena bonariensis
Cabbage Stem Flea Beetle
- Group
- Beetles
- Records since 2000
- 1,230
- Scientific name
- Psylliodes chrysocephalus
Sea Club-rush
- Group
- Flowering plants
- Records since 2000
- 1,227
- Scientific name
- Bolboschoenus maritimus
Lepidocyrtus lignorum
- Group
- Springtails
- Records since 2000
- 1,226
- Peak month
- August
Tipula fulvipennis
- Group
- True flies
- Records since 2000
- 1,226
- Peak month
- August
Hippothoa divaricata
- Group
- Bryozoans
- Records since 2000
- 1,219
- Peak month
- August
Chevron
- Group
- Butterflies and moths
- Records since 2000
- 1,213
- Scientific name
- Eulithis testata
Common knotweed
- Group
- Flowering plants
- Records since 2000
- 1,210
- Scientific name
- Polygonum arenastrum
Northern pike, Pike
- Group
- Fish
- Records since 2000
- 1,208
- Scientific name
- Esox lucius
Grey Alder
- Group
- Flowering plants
- Records since 2000
- 1,206
- Scientific name
- Alnus incana
Mother of Pearl
- Group
- Butterflies and moths
- Records since 2000
- 1,206
- Scientific name
- Pleuroptya ruralis
Frogbit
- Group
- Flowering plants
- Records since 2000
- 1,205
- Scientific name
- Hydrocharis morsus-ranae
Western Barbastelle
- Group
- Mammals
- Records since 2000
- 1,201
- Scientific name
- Barbastella barbastellus
Asian gypsy moth, Gypsy Moth
- Group
- Butterflies and moths
- Records since 2000
- 1,200
- Scientific name
- Lymantria dispar
White-winged Tern
- Group
- Birds
- Records since 2000
- 1,194
- Scientific name
- Chlidonias leucopterus
Field Cuckoo Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 1,191
- Scientific name
- Bombus campestris
Sertularella gayi
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 1,190
- Peak month
- August
Amaeana trilobata
- Group
- Worms (annelids)
- Records since 2000
- 1,186
- Peak month
- August
Cribrilaria innominata
- Group
- Bryozoans
- Records since 2000
- 1,185
- Peak month
- August
Eurysyllis tuberculata
- Group
- Worms (annelids)
- Records since 2000
- 1,185
- Peak month
- August
Bradycellus verbasci
- Group
- Beetles
- Records since 2000
- 1,184
- Peak month
- August
Strawberry blossom weevil
- Group
- Beetles
- Records since 2000
- 1,181
- Scientific name
- Anthonomus rubi
Ivy-leaved Duckweed
- Group
- Flowering plants
- Records since 2000
- 1,177
- Scientific name
- Lemna trisulca
Snake Blenny
- Group
- Fish
- Records since 2000
- 1,177
- Scientific name
- Lumpenus lampretaeformis
Odontosyllis fulgurans
- Group
- Worms (annelids)
- Records since 2000
- 1,175
- Peak month
- August
Scrambled egg slime, Flowers of tan, Dog vomit slime mold
- Group
- Microorganisms and protists
- Records since 2000
- 1,175
- Scientific name
- Fuligo septica
Pointed Pouncewort
- Group
- Liverworts
- Records since 2000
- 1,168
- Scientific name
- Harpalejeunea molleri
Coleosporium tussilaginis
- Group
- Fungi
- Records since 2000
- 1,166
- Peak month
- August
Podila humilis
- Group
- Fungi
- Records since 2000
- 1,163
- Peak month
- August
Rhododendron leafhopper
- Group
- True bugs
- Records since 2000
- 1,156
- Scientific name
- Graphocephala fennahi
Syllis garciai
- Group
- Worms (annelids)
- Records since 2000
- 1,155
- Peak month
- August
Malmgrenia marphysae
- Group
- Worms (annelids)
- Records since 2000
- 1,153
- Peak month
- August
Crescent
- Group
- Butterflies and moths
- Records since 2000
- 1,151
- Scientific name
- Helotropha leucostigma
Escharella variolosa
- Group
- Bryozoans
- Records since 2000
- 1,150
- Peak month
- August
Unbranched Bur-reed
- Group
- Flowering plants
- Records since 2000
- 1,148
- Scientific name
- Sparganium emersum
Small China-mark
- Group
- Butterflies and moths
- Records since 2000
- 1,146
- Scientific name
- Cataclysta lemnata
Bloomed Furrow Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 1,131
- Scientific name
- Lasioglossum albipes
Narrow-headed Ant
- Group
- Bees, wasps and ants
- Records since 2000
- 1,123
- Scientific name
- Formica exsecta
Banded Chink Shell
- Group
- Molluscs
- Records since 2000
- 1,118
- Scientific name
- Lacuna vincta
Schistomeringos neglecta
- Group
- Worms (annelids)
- Records since 2000
- 1,118
- Peak month
- August
Diplodonta rotundata
- Group
- Molluscs
- Records since 2000
- 1,112
- Peak month
- August
Bradysia trivittata
- Group
- True flies
- Records since 2000
- 1,108
- Peak month
- August
Clover weevil
- Group
- Beetles
- Records since 2000
- 1,107
- Scientific name
- Sitona hispidulus
Palposyllis prosostoma
- Group
- Worms (annelids)
- Records since 2000
- 1,107
- Peak month
- August
Wart lichen
- Group
- Fungi
- Records since 2000
- 1,106
- Scientific name
- Verrucaria ditmarsica
Italian Alder
- Group
- Flowering plants
- Records since 2000
- 1,104
- Scientific name
- Alnus cordata