Limnephilus luridus
- Group
- Caddisflies
- Records since 2000
- 542
- Peak month
- June
Paradelphomyia senilis
- Group
- True flies
- Records since 2000
- 542
- Peak month
- June
Annual fescue
- Group
- Flowering plants
- Records since 2000
- 540
- Scientific name
- Festuca myuros
Black Mustard
- Group
- Flowering plants
- Records since 2000
- 540
- Scientific name
- Brassica nigra
Plain reed beetle
- Group
- Beetles
- Records since 2000
- 540
- Scientific name
- Donacia simplex
Frond-Aeolis
- Group
- Molluscs
- Records since 2000
- 539
- Scientific name
- Dendronotus frondosus
Laura psylla
- Group
- True bugs
- Records since 2000
- 539
- Scientific name
- Lauritrioza alacris
Red rock worm
- Group
- Worms (annelids)
- Records since 2000
- 539
- Scientific name
- Marphysa sanguinea
Heather Groundling
- Group
- Butterflies and moths
- Records since 2000
- 538
- Scientific name
- Neofaculta ericetella
Iphinoe serrata
- Group
- Crustaceans
- Records since 2000
- 537
- Peak month
- June
Leaf-miner fly
- Group
- True flies
- Records since 2000
- 537
- Scientific name
- Phytomyza ranunculi
Pod Razor
- Group
- Molluscs
- Records since 2000
- 536
- Scientific name
- Pharus legumen
Staph beetle
- Group
- Beetles
- Records since 2000
- 536
- Scientific name
- Xantholinus linearis
Pepper-saxifrage
- Group
- Flowering plants
- Records since 2000
- 535
- Scientific name
- Silaum silaus
Fig-leaved Goosefoot
- Group
- Flowering plants
- Records since 2000
- 534
- Scientific name
- Chenopodium ficifolium
Tipula scripta
- Group
- True flies
- Records since 2000
- 533
- Peak month
- June
Weevil
- Group
- Beetles
- Records since 2000
- 533
- Scientific name
- Hypera rumicis
Crimora papillata
- Group
- Molluscs
- Records since 2000
- 532
- Peak month
- June
Staph beetle
- Group
- Beetles
- Records since 2000
- 531
- Scientific name
- Tachyporus dispar
Purple Milk-vetch
- Group
- Flowering plants
- Records since 2000
- 529
- Scientific name
- Astragalus danicus
Pirate Otter Spider
- Group
- Spiders
- Records since 2000
- 528
- Scientific name
- Pirata piraticus
Rhodomela confervoides
- Group
- Seaweeds and algae
- Records since 2000
- 528
- Peak month
- June
Dark Brocade
- Group
- Butterflies and moths
- Records since 2000
- 527
- Scientific name
- Mniotype adusta
Orange lights seasquirt
- Group
- Sea squirts
- Records since 2000
- 527
- Scientific name
- Pycnoclavella aurilucens
Black Marram Weevil
- Group
- Beetles
- Records since 2000
- 526
- Scientific name
- Otiorhynchus atroapterus
Luperus longicornis
- Group
- Beetles
- Records since 2000
- 526
- Peak month
- June
Microdeutopus anomalus
- Group
- Crustaceans
- Records since 2000
- 526
- Peak month
- June
Silver Ragwort
- Group
- Flowering plants
- Records since 2000
- 526
- Scientific name
- Jacobaea maritima
Strandline Beetle
- Group
- Beetles
- Records since 2000
- 526
- Scientific name
- Nebria complanata
Marsh Warbler/Eurasian Reed Warbler
- Group
- Birds
- Records since 2000
- 524
- Scientific name
- Acrocephalus palustris
Slave-making Ant
- Group
- Bees, wasps and ants
- Records since 2000
- 524
- Scientific name
- Formica sanguinea
Martagon Lily
- Group
- Flowering plants
- Records since 2000
- 522
- Scientific name
- Lilium martagon
Rove beetle
- Group
- Beetles
- Records since 2000
- 521
- Scientific name
- Drusilla canaliculata
Blotched Emerald
- Group
- Butterflies and moths
- Records since 2000
- 519
- Scientific name
- Comibaena bajularia
Corky-fruited Water-dropwort
- Group
- Flowering plants
- Records since 2000
- 518
- Scientific name
- Oenanthe pimpinelloides
Drooping Bryum
- Group
- Mosses
- Records since 2000
- 518
- Scientific name
- Ptychostomum compactum
Psilolechia leprosa
- Group
- Lichens
- Records since 2000
- 518
- Peak month
- June
Toothed Tiger Ichneumon
- Group
- Bees, wasps and ants
- Records since 2000
- 518
- Scientific name
- Amblyteles armatorius
Ampharete baltica
- Group
- Worms (annelids)
- Records since 2000
- 517
- Peak month
- June
Sphegina clunipes
- Group
- True flies
- Records since 2000
- 517
- Peak month
- June
Rhagonycha testacea
- Group
- Beetles
- Records since 2000
- 516
- Peak month
- June
Platypalpus pallidiventris
- Group
- True flies
- Records since 2000
- 515
- Peak month
- June
Timothy Tortrix
- Group
- Butterflies and moths
- Records since 2000
- 513
- Scientific name
- Zelotherses paleana
Waisted Duckfly
- Group
- True flies
- Records since 2000
- 513
- Scientific name
- Anasimyia contracta
Western Bee-fly
- Group
- True flies
- Records since 2000
- 513
- Scientific name
- Bombylius canescens
Fannia postica
- Group
- True flies
- Records since 2000
- 511
- Peak month
- June
Alcyonidium hirsutum
- Group
- Bryozoans
- Records since 2000
- 510
- Peak month
- June
Bracken Planthopper
- Group
- True bugs
- Records since 2000
- 510
- Scientific name
- Ditropis pteridis