Eurasian Collared-Dove
- Group
- Birds
- Peak month
- May
- Records since 2000
- 476,656
Described in 1838
104 species
Parasmittina trispinosa
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 2,872
Navicula lanceolata
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 2,789
Cocconeis placentula
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,767
Lesser Scaup
- Group
- Birds
- Peak month
- March
- Records since 2000
- 2,556
Cheilosia morio
- Group
- True flies
- Peak month
- August
- Records since 2000
- 2,521
Gypsy Cuckoo Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 2,141
Sika Deer
- Group
- Mammals
- Peak month
- September
- Records since 2000
- 2,042
Hairy Wood Ant
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 1,492
Common Goby
- Group
- Fish
- Peak month
- September
- Records since 2000
- 1,459
Oyster gall, April-bud gall
- Group
- Bees, wasps and ants
- Peak month
- September
- Records since 2000
- 1,306
Azelia cilipes
- Group
- True flies
- Peak month
- July
- Records since 2000
- 1,298
Bristleworm
- Group
- Worms (annelids)
- Peak month
- September
- Records since 2000
- 1,274
Plant bug
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 1,172
Escharella variolosa
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 1,150
Zyginidia scutellaris
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 1,117
Cocconeis pediculus
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,067
Fly
- Group
- True flies
- Peak month
- October
- Records since 2000
- 1,038
Dicraeus vagans
- Group
- True flies
- Peak month
- June
- Records since 2000
- 1,032
Gomphonema olivaceum
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 1,026
Creeping Thistle Lacebug
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 731
Ceratopogon lacteipennis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 641
Northern Atlantic Hairy Hermit Crab
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 595
Hawthorn lacebug
- Group
- True bugs
- Peak month
- April
- Records since 2000
- 582
Boston Facelina
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 581
Empis nuntia
- Group
- True flies
- Peak month
- June
- Records since 2000
- 509
Phylidorea squalens
- Group
- True flies
- Peak month
- June
- Records since 2000
- 498
Parapleustes bicuspis
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 405
Steatoda grossa
- Group
- Spiders
- Peak month
- November
- Records since 2000
- 404
Doto fragilis
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 392
Euspira montagui
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 374
Halecium beanii
- Group
- Jellyfish, corals and anemones
- Peak month
- September
- Records since 2000
- 366
Andrena lapponica
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 360
Quicksilver diver
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 333
Dixella autumnalis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 314
Eubranchus tricolor
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 288
Sandy ray
- Group
- Fish
- Peak month
- November
- Records since 2000
- 272
Chamaemyia flavipalpis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 256
Tephrochlamys flavipes
- Group
- True flies
- Peak month
- October
- Records since 2000
- 248
Tipula subnodicornis
- Group
- True flies
- Peak month
- May
- Records since 2000
- 248
Malthodes fuscus
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 234
Stiletto-fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 221
Gomphonema gracile
- Group
- Seaweeds and algae
- Peak month
- October
- Records since 2000
- 207
Tetanocera fuscinervis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 205
A solitary bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 197
Actia lamia
- Group
- True flies
- Peak month
- June
- Records since 2000
- 184
Diplolepis nervosa
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 176
Hemiptarsenus unguicellus
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 176
Diplosolen obelium
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 170
Erioptera griseipennis
- Group
- True flies
- Peak month
- May
- Records since 2000
- 166
Fagocyba cruenta
- Group
- True bugs
- Peak month
- August
- Records since 2000
- 157
Diglyphus isaea
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 154
Woodlouse spider
- Group
- Spiders
- Peak month
- April
- Records since 2000
- 149
Cheilosia albipila
- Group
- True flies
- Peak month
- April
- Records since 2000
- 141
Coelopa pilipes
- Group
- True flies
- Peak month
- June
- Records since 2000
- 137
Cyclodinus constrictus
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 134
Oscinella nitidissima
- Group
- True flies
- Peak month
- August
- Records since 2000
- 133
Fucellia maritima
- Group
- True flies
- Peak month
- August
- Records since 2000
- 132
Pseudocoenosia solitaria
- Group
- True flies
- Peak month
- July
- Records since 2000
- 130
Meiosimyza subfasciata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 126
Gymnetron villosulum
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 125
Northern February Red
- Group
- Stoneflies
- Peak month
- February
- Records since 2000
- 125
Simulium argyreatum
- Group
- True flies
- Peak month
- April
- Records since 2000
- 124
Coleophora lutipennella
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 114
Myllaena brevicornis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 111
Tethina illota
- Group
- True flies
- Peak month
- July
- Records since 2000
- 108
Dryope decrepita
- Group
- True flies
- Peak month
- June
- Records since 2000
- 107
Hydrophorus oceanus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 106
Anagnota bicolor
- Group
- True flies
- Peak month
- June
- Records since 2000
- 102
Pseudotrichia rubiginosa
- Group
- Molluscs
- Peak month
- October
- Records since 2000
- 97
Cheilosia longula
- Group
- True flies
- Peak month
- July
- Records since 2000
- 92
Palio nothus
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 91
Rhamphomyia pilifer
- Group
- True flies
- Peak month
- May
- Records since 2000
- 91
Protanypus morio
- Group
- True flies
- Peak month
- April
- Records since 2000
- 90
Bradysia fenestralis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 88
Saldula opacula
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 87
Ischyrocerus anguipes
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 84
Membraniporella nitida
- Group
- Bryozoans
- Peak month
- September
- Records since 2000
- 84
Tytthus pygmaeus
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 83
Pedicia straminea
- Group
- True flies
- Peak month
- September
- Records since 2000
- 82
Chrysocharis pubicornis
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 80
Suillia flavifrons
- Group
- True flies
- Peak month
- June
- Records since 2000
- 78
Zwicknia bifrons
- Group
- Stoneflies
- Peak month
- March
- Records since 2000
- 78
Tachydromia morio
- Group
- True flies
- Peak month
- June
- Records since 2000
- 77
Medetera pallipes
- Group
- True flies
- Peak month
- June
- Records since 2000
- 76
Salicarus roseri
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 75
Little Shearwater
- Group
- Birds
- Peak month
- October
- Records since 2000
- 74
Pogonota barbata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 74
Rhaphium discolor
- Group
- True flies
- Peak month
- June
- Records since 2000
- 68
Dolichopus sabinus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 66
Megastylus orbitator
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 66
Rhamphomyia hybotina
- Group
- True flies
- Peak month
- May
- Records since 2000
- 64
Acrodactyla degener
- Group
- Bees, wasps and ants
- Peak month
- September
- Records since 2000
- 59
Polypedilum pullum
- Group
- True flies
- Peak month
- August
- Records since 2000
- 59
Pandalus borealis
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 58
Platycheirus podagratus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 58
Psectrocladius sordidellus
- Group
- True flies
- Peak month
- September
- Records since 2000
- 58
Maccoa Duck
- Group
- Birds
- Peak month
- April
- Records since 2000
- 57
Melangyna arctica
- Group
- True flies
- Peak month
- July
- Records since 2000
- 55
Vertigo alpestris
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 55
Thinophilus ruficornis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 54
Catriona gymnota
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 52
Caprella septentrionalis
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 51
Dicranomyia quadra
- Group
- True flies
- Peak month
- May
- Records since 2000
- 50