American plaice, Long Rough Dab
- Group
- Fish
- Peak month
- August
- Records since 2000
- 90,129
Described in 1780
51 species
Banded Demoiselle
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 75,531
Paddleworm
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 11,137
Bumblebee Blacklet
- Group
- True flies
- Peak month
- July
- Records since 2000
- 6,599
Spring Epistrophe
- Group
- True flies
- Peak month
- April
- Records since 2000
- 6,574
Ciliated sponge
- Group
- Sponges
- Peak month
- July
- Records since 2000
- 5,990
Arctic comb jelly
- Group
- Other invertebrates
- Peak month
- August
- Records since 2000
- 5,940
Bank Vole
- Group
- Mammals
- Peak month
- September
- Records since 2000
- 3,619
Nephtys caeca
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 3,601
Gallery Worm
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 3,083
Thelepus cincinnatus
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 2,893
Black-kneed Fen Fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 2,014
Tooth-thighed Hoverfly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 1,693
Phaonia subventa
- Group
- True flies
- Peak month
- April
- Records since 2000
- 1,680
Muscid fly
- Group
- True flies
- Peak month
- March
- Records since 2000
- 1,390
Compressed purse sponge
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 1,203
Nebalia bipes
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 1,191
Scrambled egg slime, Flowers of tan, Dog vomit slime mold
- Group
- Microorganisms and protists
- Peak month
- August
- Records since 2000
- 1,175
Helina reversio
- Group
- True flies
- Peak month
- July
- Records since 2000
- 1,124
Eteone flava
- Group
- Worms (annelids)
- Peak month
- September
- Records since 2000
- 1,073
House fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 758
Bristly bryozoan
- Group
- Bryozoans
- Peak month
- July
- Records since 2000
- 701
Root-maggot Fly
- Group
- True flies
- Peak month
- May
- Records since 2000
- 676
Toxonevra muliebris
- Group
- True flies
- Peak month
- August
- Records since 2000
- 559
Dog Vomit Slime Mould
- Group
- Microorganisms and protists
- Peak month
- November
- Records since 2000
- 518
Paregle audacula
- Group
- True flies
- Peak month
- July
- Records since 2000
- 501
Fannia lustrator
- Group
- True flies
- Peak month
- May
- Records since 2000
- 488
Cheilosia corydon
- Group
- True flies
- Peak month
- March
- Records since 2000
- 449
Phaonia valida
- Group
- True flies
- Peak month
- July
- Records since 2000
- 433
Muscina prolapsa
- Group
- True flies
- Peak month
- July
- Records since 2000
- 381
Anomoia purmunda
- Group
- True flies
- Peak month
- July
- Records since 2000
- 320
Skeneopsis planorbis
- Group
- Molluscs
- Peak month
- March
- Records since 2000
- 315
Xanthandrus comtus
- Group
- True flies
- Peak month
- August
- Records since 2000
- 312
Tmetonyx cicada
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 291
Nicomache lumbricalis
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 283
Ravinia pernix
- Group
- True flies
- Peak month
- August
- Records since 2000
- 268
Priocnemis perturbator
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 234
Thelaira solivaga
- Group
- True flies
- Peak month
- August
- Records since 2000
- 197
A chiton
- Group
- Molluscs
- Peak month
- October
- Records since 2000
- 166
Beroe cucumis
- Group
- Other invertebrates
- Peak month
- June
- Records since 2000
- 158
Turtonia minuta
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 155
Polietes domitor
- Group
- True flies
- Peak month
- May
- Records since 2000
- 132
Hydrotaea diabolus
- Group
- True flies
- Peak month
- May
- Records since 2000
- 127
Philophylla caesio
- Group
- True flies
- Peak month
- July
- Records since 2000
- 116
Myoxocephalus scorpioides
- Group
- Fish
- Peak month
- September
- Records since 2000
- 106
Elgiva solicita
- Group
- True flies
- Peak month
- July
- Records since 2000
- 102
Pocota personata
- Group
- True flies
- Peak month
- May
- Records since 2000
- 89
Nymphon hirtum
- Group
- Other invertebrates
- Peak month
- June
- Records since 2000
- 71
Otiorhynchus arcticus
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 60
Juxtacribrilina annulata
- Group
- Bryozoans
- Peak month
- April
- Records since 2000
- 59
Pholoe minuta
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 57