Common Chiffchaff
- Group
- Birds
- Peak month
- April
- Records since 2000
- 669,402
Described in 1817
94 species
Daubenton's Bat
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 65,340
Natterer's Bat
- Group
- Mammals
- Peak month
- February
- Records since 2000
- 13,257
Common Footman
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 8,262
Lesser noctule
- Group
- Mammals
- Peak month
- June
- Records since 2000
- 4,848
Sigara dorsalis
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 4,037
Dark-winged Chrysogaster
- Group
- True flies
- Peak month
- July
- Records since 2000
- 3,254
Stripe-backed Brusheye
- Group
- True flies
- Peak month
- August
- Records since 2000
- 2,892
Privet tortrix
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 2,085
Red-belted Cleaver
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 1,308
Icterine Warbler
- Group
- Birds
- Peak month
- May
- Records since 2000
- 1,038
Ramson's Hoverfly
- Group
- True flies
- Peak month
- May
- Records since 2000
- 1,031
Sigara fossarum
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 961
Yellow-girdled Brusheye
- Group
- True flies
- Peak month
- August
- Records since 2000
- 947
Perapion curtirostre
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 808
Common Whiskered Bat
- Group
- Mammals
- Peak month
- June
- Records since 2000
- 798
Arched Razor Shell
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 763
Holly Tortrix
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 683
Eualus cranchii
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 591
Tipula unca
- Group
- True flies
- Peak month
- June
- Records since 2000
- 590
Broadbar Clover Sawfly
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 586
Ginger Button
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 557
Cheilosia vernalis
- Group
- True flies
- Peak month
- August
- Records since 2000
- 544
Melodious Warbler
- Group
- Birds
- Peak month
- September
- Records since 2000
- 529
Phaonia incana
- Group
- True flies
- Peak month
- June
- Records since 2000
- 486
Cheilosia scutellata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 447
Dolichopus popularis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 435
A Soldier Fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 413
Fagisyrphus cincta
- Group
- True flies
- Peak month
- April
- Records since 2000
- 401
Pegomya bicolor
- Group
- True flies
- Peak month
- May
- Records since 2000
- 389
A crab
- Group
- Crustaceans
- Peak month
- March
- Records since 2000
- 381
Phyllonorycter ulmifoliella
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 381
Thricops semicinereus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 379
Mintho rufiventris
- Group
- True flies
- Peak month
- June
- Records since 2000
- 345
Protocalliphora azurea
- Group
- True flies
- Peak month
- August
- Records since 2000
- 322
Thelaira nigrina
- Group
- True flies
- Peak month
- June
- Records since 2000
- 301
Astarte montagui
- Group
- Molluscs
- Peak month
- March
- Records since 2000
- 294
Nemotelus nigrinus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 294
Dactylochelifer latreillii
- Group
- Mites, harvestmen and other arachnids
- Peak month
- July
- Records since 2000
- 272
Orthonevra nobilis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 269
Eumerus strigatus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 266
Sigara stagnalis
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 264
Morellia hortorum
- Group
- True flies
- Peak month
- July
- Records since 2000
- 263
Bechstein's Bat
- Group
- Mammals
- Peak month
- January
- Records since 2000
- 257
Argyra vestita
- Group
- True flies
- Peak month
- June
- Records since 2000
- 247
Protopirapion atratulum
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 244
Thricops diaphanus
- Group
- True flies
- Peak month
- October
- Records since 2000
- 242
Ash Gyro
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 230
Riolus subviolaceus
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 230
Rhogogaster scalaris
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 229
Eriozona syrphoides
- Group
- True flies
- Peak month
- August
- Records since 2000
- 228
Ebalia cranchii
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 220
Rybaxis longicornis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 219
Dinera grisescens
- Group
- True flies
- Peak month
- July
- Records since 2000
- 197
Chrysotus neglectus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 166
Tipula pruinosa
- Group
- True flies
- Peak month
- July
- Records since 2000
- 166
Birch Leafminer
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 165
Verrallia aucta
- Group
- True flies
- Peak month
- June
- Records since 2000
- 161
Orthochaetes setiger
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 158
Cliff Swallow
- Group
- Birds
- Peak month
- September
- Records since 2000
- 157
Tenthredo colon
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 141
Aquatic Warbler
- Group
- Birds
- Peak month
- August
- Records since 2000
- 140
Poecilobothrus chrysozygos
- Group
- True flies
- Peak month
- July
- Records since 2000
- 138
Ischnopterapion modestum
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 130
Elachista albifrontella
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 129
Tenthredopsis coquebertii
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 123
Acidia cognata
- Group
- True flies
- Peak month
- October
- Records since 2000
- 121
Platycheirus ambiguum
- Group
- True flies
- Peak month
- April
- Records since 2000
- 117
Reichenbachia juncorum
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 117
Sarcophila latifrons
- Group
- True flies
- Peak month
- July
- Records since 2000
- 112
Bristle worm
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 111
Hercostomus chalybeus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 108
Rhogogaster punctulata
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 94
Tenthredo zona
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 93
Azelia triquetra
- Group
- True flies
- Peak month
- July
- Records since 2000
- 92
Agathidium varians
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 83
Fannia lepida
- Group
- True flies
- Peak month
- May
- Records since 2000
- 81
Apotomis capreana
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 80
Cranchia scabra
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 79
Bilberry pug
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 78
Corixa affinis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 78
Monochroa tenebrella
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 74
Larch case-bearer
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 66
Brachyopa bicolor
- Group
- True flies
- Peak month
- May
- Records since 2000
- 61
Aspen Hoverfly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 59
Hercostomus germanus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 59
Megarthrus denticollis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 57
Chrysotus laesus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 56
Diplapion stolidum
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 56
Crab
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 55
Dinera carinifrons
- Group
- True flies
- Peak month
- July
- Records since 2000
- 55
Mallota cimbiciformis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 54
Eumerus sabulonum
- Group
- True flies
- Peak month
- June
- Records since 2000
- 53
Tenthredo olivacea
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 53