Seraphim
- Group
- Butterflies and moths
- Records since 2000
- 516
- Scientific name
- Lobophora halterata
Heath Dog-violet
- Group
- Flowering plants
- Records since 2000
- 513
- Scientific name
- Viola canina
Grey Gorse Piercer
- Group
- Butterflies and moths
- Records since 2000
- 512
- Scientific name
- Cydia ulicetana
Helochares punctatus
- Group
- Beetles
- Records since 2000
- 511
- Also known as
- a water beetle
Bird's-nest Orchid
- Group
- Flowering plants
- Records since 2000
- 509
- Scientific name
- Neottia nidus-avis
Aceria brevipunctata
- Group
- Mites, harvestmen and other arachnids
- Records since 2000
- 505
- Peak month
- May
Phaonia rufiventris
- Group
- True flies
- Records since 2000
- 505
- Peak month
- May
Spotted Wolf Spider
- Group
- Spiders
- Records since 2000
- 504
- Scientific name
- Pardosa amentata
Black Orangeband Sawfly
- Group
- Bees, wasps and ants
- Records since 2000
- 502
- Scientific name
- Macrophya annulata
Truncated Dimple Lichen
- Group
- Lichens
- Records since 2000
- 502
- Scientific name
- Gyalecta truncigena
Vaunthompsonia cristata
- Group
- Crustaceans
- Records since 2000
- 502
- Peak month
- May
Micarea alabastrites
- Group
- Lichens
- Records since 2000
- 501
- Also known as
- a Lichen
Prionocera turcica
- Group
- True flies
- Records since 2000
- 500
- Peak month
- May
Two-marked harp ground beetle
- Group
- Beetles
- Records since 2000
- 498
- Scientific name
- Anisodactylus binotatus
Lipsothrix remota
- Group
- True flies
- Records since 2000
- 496
- Peak month
- May
Balding Pincushion
- Group
- Mosses
- Records since 2000
- 495
- Scientific name
- Ulota calvescens
Harpalus latus
- Group
- Beetles
- Records since 2000
- 494
- Peak month
- May
Petaled rock tripe lichen
- Group
- Lichens
- Records since 2000
- 494
- Scientific name
- Umbilicaria polyphylla
Bark lice
- Group
- Other insects
- Records since 2000
- 493
- Scientific name
- Elipsocus hyalinus
Bombardier Beetle
- Group
- Beetles
- Records since 2000
- 490
- Scientific name
- Brachinus crepitans
Petty Whin
- Group
- Flowering plants
- Records since 2000
- 490
- Scientific name
- Genista anglica
Silverfish
- Group
- Other insects
- Records since 2000
- 490
- Scientific name
- Lepisma saccharinum
Gomphonema calcifugum
- Group
- Seaweeds and algae
- Records since 2000
- 489
- Peak month
- May
Orange-shinned Blacklet
- Group
- True flies
- Records since 2000
- 489
- Scientific name
- Cheilosia fraterna
Brown-head Stubble Lichen
- Group
- Lichens
- Records since 2000
- 488
- Scientific name
- Chaenotheca brunneola
Fannia lustrator
- Group
- True flies
- Records since 2000
- 488
- Peak month
- May
Nicolea zostericola
- Group
- Worms (annelids)
- Records since 2000
- 487
- Peak month
- May
Patagonian Blenny
- Group
- Fish
- Records since 2000
- 487
- Scientific name
- Eleginops maclovinus
Perfoliate Alexanders
- Group
- Flowering plants
- Records since 2000
- 487
- Scientific name
- Smyrnium perfoliatum
Lesteva longoelytrata
- Group
- Beetles
- Records since 2000
- 484
- Peak month
- May
Tritaeta gibbosa
- Group
- Crustaceans
- Records since 2000
- 484
- Peak month
- May
Coastal Red Tick
- Group
- Mites, harvestmen and other arachnids
- Records since 2000
- 483
- Scientific name
- Haemaphysalis punctata
Squacco Heron
- Group
- Birds
- Records since 2000
- 483
- Scientific name
- Ardeola ralloides
White Atlantic Cadlina
- Group
- Molluscs
- Records since 2000
- 483
- Scientific name
- Cadlina laevis
Alder Moth
- Group
- Butterflies and moths
- Records since 2000
- 481
- Scientific name
- Acronicta alni
Rose Rust
- Group
- Fungi
- Records since 2000
- 481
- Scientific name
- Phragmidium mucronatum
Rhyparochromus vulgaris
- Group
- True bugs
- Records since 2000
- 480
- Peak month
- May
Platystomos albinus
- Group
- Beetles
- Records since 2000
- 479
- Peak month
- May
Epuraea aestiva
- Group
- Beetles
- Records since 2000
- 477
- Peak month
- May
Coenosia agromyzina
- Group
- True flies
- Records since 2000
- 476
- Peak month
- May
Dune sand scarab beetle
- Group
- Beetles
- Records since 2000
- 476
- Scientific name
- Aegialia arenaria
Aceria myriadeum
- Group
- Mites, harvestmen and other arachnids
- Records since 2000
- 474
- Peak month
- May
Effervescent Tarpaper Lichen
- Group
- Lichens
- Records since 2000
- 474
- Scientific name
- Collema furfuraceum
Anthocomus fasciatus
- Group
- Beetles
- Records since 2000
- 473
- Peak month
- May
Chinaman's Hat, Chinese hat
- Group
- Molluscs
- Records since 2000
- 473
- Scientific name
- Calyptraea chinensis
Geoffroy's Blood Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 472
- Scientific name
- Sphecodes geoffrellus
Panzer's Cuckoo Nomad Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 472
- Scientific name
- Nomada panzeri
Limnophyes edwardsi
- Group
- True flies
- Records since 2000
- 470
- Peak month
- May