Barnacle Goose
- Group
- Birds
- Peak month
- October
- Records since 2000
- 47,758
Described in 1803
77 species
Two-toothed Montagu shell
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 17,412
Shuttle-shaped Dart
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 13,962
Flexuose Cleftclam
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 11,473
Kentish Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 7,788
Alder's necklace shell
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 5,202
Dingy Footman
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 4,648
Pointed Topsnail
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 3,548
Spiny Myrtea
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 2,781
Little Astarte Clam
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 2,048
Semi-ribbed spire snail
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 1,686
Plaited Door Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 1,675
Sea Hare
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 1,419
Eupteryx urticae
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 1,178
Oedemera femoralis
- Group
- Beetles
- Peak month
- October
- Records since 2000
- 1,144
Banded Chink Shell
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 1,118
Diplodonta rotundata
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 1,112
Translucent hyala
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 1,026
Arctic Barrel-Bubble
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 947
Little Venus
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 932
Retusa umbilicata
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 910
Tritonia hombergii
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 803
Red-spotted horseshoe
- Group
- Worms (annelids)
- Peak month
- September
- Records since 2000
- 792
Large Wainscot
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 725
Ash-black Slug
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 699
Smooth blind shell
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 650
Marsh Sandpiper
- Group
- Birds
- Peak month
- September
- Records since 2000
- 620
Twaite Shad
- Group
- Fish
- Peak month
- February
- Records since 2000
- 599
Suborbicular Kellyclam
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 551
Leaf-miner fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 537
Abra tenuis
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 447
Criorhina ranunculi
- Group
- True flies
- Peak month
- April
- Records since 2000
- 417
Bela nebula
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 369
Saltella sphondylii
- Group
- True flies
- Peak month
- July
- Records since 2000
- 344
Lepton squamosum
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 322
Cryptosula pallasiana
- Group
- Bryozoans
- Peak month
- September
- Records since 2000
- 312
Alvania punctura
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 280
Ectemnius lituratus
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 280
Agrilus laticornis
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 268
Arenostola phragmitidis
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 263
Cyrillia linearis
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 263
Tephritis bardanae
- Group
- True flies
- Peak month
- June
- Records since 2000
- 262
A spire snail
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 258
Epitrix pubescens
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 246
Callochiton septemvalvis
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 227
Odostomia unidentata
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 202
Spiralina spiralis
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 201
Berthella plumula
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 198
Tornus subcarinatus
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 198
Thick lacuna
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 181
Calameuta pallipes
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 174
Odostomia plicata
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 170
Satin lutestring
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 159
Pandora pinna
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 155
Point snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 149
Pisa armata
- Group
- Crustaceans
- Peak month
- March
- Records since 2000
- 143
Parthenina decussata
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 138
Ectemnius lapidarius
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 133
Holcostethus strictus
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 133
Rabdophaga salicis
- Group
- True flies
- Peak month
- September
- Records since 2000
- 109
Loxocera albiseta
- Group
- True flies
- Peak month
- July
- Records since 2000
- 107
Mangelia attenuata
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 107
Tremulicerus vitreus
- Group
- True bugs
- Peak month
- March
- Records since 2000
- 104
Janua heterostropha
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 98
Lamprochernes nodosus
- Group
- Mites, harvestmen and other arachnids
- Peak month
- September
- Records since 2000
- 91
Jordaniella nivosa
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 88
Fagniezia impressa
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 86
Agrilus angustulus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 76
Geryon trispinosus
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 72
Psylliodes dulcamarae
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 71
Caecum trachea
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 69
Propebela rufa
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 63
Diplocolenus abdominalis
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 58
Thracia distorta
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 58
Bottlenose Skate, Spearnose Skate, White Skate
- Group
- Fish
- Peak month
- April
- Records since 2000
- 57
Large copper
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 54
Alinda biplicata
- Group
- Molluscs
- Peak month
- October
- Records since 2000
- 50