Ribbed Melilot
- Group
- Flowering plants
- Records since 2000
- 520
- Scientific name
- Melilotus officinalis
Moss Chrysalis Snail
- Group
- Molluscs
- Records since 2000
- 518
- Scientific name
- Pupilla muscorum
Paracorymbia fulva
- Group
- Beetles
- Records since 2000
- 518
- Peak month
- July
Western Brook-moss
- Group
- Mosses
- Records since 2000
- 518
- Scientific name
- Pseudohygrohypnum eugyrium
European Alder Leafminer
- Group
- Bees, wasps and ants
- Records since 2000
- 515
- Scientific name
- Fenusa dohrnii
Heather leafhopper
- Group
- True bugs
- Records since 2000
- 515
- Scientific name
- Ulopa reticulata
Leaden Spider Wasp
- Group
- Bees, wasps and ants
- Records since 2000
- 515
- Scientific name
- Pompilus cinereus
Rough whorl snail
- Group
- Molluscs
- Records since 2000
- 514
- Scientific name
- Columella aspera
Egg Flapwort
- Group
- Liverworts
- Records since 2000
- 512
- Scientific name
- Solenostoma obovatum
Leptometra celtica
- Group
- Starfish and sea urchins
- Records since 2000
- 511
- Peak month
- July
Cololejeunea calcarea
- Group
- Liverworts
- Records since 2000
- 510
- Peak month
- July
Hawthorn Cosmet
- Group
- Butterflies and moths
- Records since 2000
- 510
- Scientific name
- Blastodacna hellerella
Sweet-flag
- Group
- Flowering plants
- Records since 2000
- 509
- Scientific name
- Acorus calamus
Hydroptila forcipata
- Group
- Caddisflies
- Records since 2000
- 505
- Peak month
- July
Two-coloured brown click beetle
- Group
- Beetles
- Records since 2000
- 505
- Scientific name
- Athous bicolor
Dodder
- Group
- Flowering plants
- Records since 2000
- 503
- Scientific name
- Cuscuta epithymum
Oxyethira flavicornis
- Group
- Caddisflies
- Records since 2000
- 503
- Peak month
- July
Anthomyza gracilis
- Group
- True flies
- Records since 2000
- 502
- Peak month
- July
Moth
- Group
- Butterflies and moths
- Records since 2000
- 502
- Scientific name
- Batia lunaris
Paregle audacula
- Group
- True flies
- Records since 2000
- 501
- Peak month
- July
Rinodina sophodes
- Group
- Lichens
- Records since 2000
- 501
- Peak month
- July
Round-fruited Collar-moss
- Group
- Mosses
- Records since 2000
- 501
- Scientific name
- Splachnum sphaericum
Obscure Earwort
- Group
- Liverworts
- Records since 2000
- 500
- Scientific name
- Scapania scandica
White Beak-sedge
- Group
- Flowering plants
- Records since 2000
- 500
- Scientific name
- Rhynchospora alba
Silvery Leaf-cutter Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 499
- Scientific name
- Megachile leachella
Streptosyllis bidentata
- Group
- Worms (annelids)
- Records since 2000
- 499
- Peak month
- July
Field Dog-lichen
- Group
- Lichens
- Records since 2000
- 498
- Scientific name
- Peltigera rufescens
Comb Notchwort
- Group
- Liverworts
- Records since 2000
- 497
- Scientific name
- Sphenolobus minutus
Cyclamen Tortrix
- Group
- Butterflies and moths
- Records since 2000
- 497
- Scientific name
- Clepsis spectrana
Ptychoptera minuta
- Group
- True flies
- Records since 2000
- 494
- Peak month
- July
Round-leaved Fluellen
- Group
- Flowering plants
- Records since 2000
- 494
- Scientific name
- Kickxia spuria
World Woodlouse Fly
- Group
- True flies
- Records since 2000
- 494
- Scientific name
- Melanophora roralis
Bulrush Veneer
- Group
- Butterflies and moths
- Records since 2000
- 492
- Scientific name
- Calamotropha paludella
Pseudolimnophila lucorum
- Group
- True flies
- Records since 2000
- 492
- Peak month
- July
Dittander
- Group
- Flowering plants
- Records since 2000
- 491
- Scientific name
- Lepidium latifolium
Anopheles daciae
- Group
- True flies
- Records since 2000
- 490
- Peak month
- July
Dicranomyia morio
- Group
- True flies
- Records since 2000
- 490
- Peak month
- July
Fannia rondanii
- Group
- True flies
- Records since 2000
- 489
- Peak month
- July
Anaretella defecta
- Group
- True flies
- Records since 2000
- 486
- Peak month
- July
Double Dart
- Group
- Butterflies and moths
- Records since 2000
- 485
- Scientific name
- Graphiphora augur
Neat Silk-moss
- Group
- Mosses
- Records since 2000
- 485
- Scientific name
- Isopterygiella pulchella
Cock's-head Bell
- Group
- Butterflies and moths
- Records since 2000
- 484
- Scientific name
- Zeiraphera isertana
Lempke's Gold Spot
- Group
- Butterflies and moths
- Records since 2000
- 483
- Scientific name
- Plusia putnami
Compact Swan-neck Moss
- Group
- Mosses
- Records since 2000
- 482
- Scientific name
- Campylopus brevipilus
Drummond's Thread-moss
- Group
- Mosses
- Records since 2000
- 481
- Scientific name
- Pohlia drummondii
Few-flowered Spike-rush
- Group
- Flowering plants
- Records since 2000
- 481
- Scientific name
- Eleocharis quinqueflora
Sepsis cynipsea
- Group
- True flies
- Records since 2000
- 481
- Peak month
- July
Grey Club-rush
- Group
- Flowering plants
- Records since 2000
- 480
- Scientific name
- Schoenoplectus tabernaemontani