Landlady's Wig
- Group
- Seaweeds and algae
- Records since 2000
- 590
- Scientific name
- Ahnfeltia plicata
Trichoderma harzianum
- Group
- Fungi
- Records since 2000
- 590
- Peak month
- September
Amathia imbricata
- Group
- Bryozoans
- Records since 2000
- 584
- Peak month
- September
Fire bug
- Group
- True bugs
- Records since 2000
- 582
- Scientific name
- Pyrrhocoris apterus
Rhodotorula mucilaginosa
- Group
- Fungi
- Records since 2000
- 571
- Peak month
- September
Siphoned Japan Weed
- Group
- Seaweeds and algae
- Records since 2000
- 570
- Scientific name
- Dasysiphonia japonica
Haustorius arenarius
- Group
- Crustaceans
- Records since 2000
- 567
- Peak month
- September
Caprella acanthifera
- Group
- Crustaceans
- Records since 2000
- 562
- Peak month
- September
Giant Puffball
- Group
- Fungi
- Records since 2000
- 562
- Scientific name
- Calvatia gigantea
Pike-perch, Zander
- Group
- Fish
- Records since 2000
- 561
- Scientific name
- Sander lucioperca
Apple blue mold
- Group
- Fungi
- Records since 2000
- 553
- Scientific name
- Penicillium expansum
Circinaria hoffmanniana
- Group
- Lichens
- Records since 2000
- 553
- Peak month
- September
Solitary maple leaf gall mite
- Group
- Mites, harvestmen and other arachnids
- Records since 2000
- 549
- Scientific name
- Aceria macrochelus
Encyonema gracile
- Group
- Seaweeds and algae
- Records since 2000
- 548
- Peak month
- September
Ortolan Bunting
- Group
- Birds
- Records since 2000
- 547
- Scientific name
- Emberiza hortulana
Bark lice
- Group
- Other insects
- Records since 2000
- 546
- Scientific name
- Ectopsocus meridionalis
Common Rush Case-bearer
- Group
- Butterflies and moths
- Records since 2000
- 545
- Scientific name
- Coleophora alticolella
Feathered Gothic
- Group
- Butterflies and moths
- Records since 2000
- 545
- Scientific name
- Tholera decimalis
Large Ranunculus [moth]
- Group
- Butterflies and moths
- Records since 2000
- 542
- Scientific name
- Polymixis flavicincta
Rhyacophila obliterata
- Group
- Caddisflies
- Records since 2000
- 541
- Peak month
- September
Brown bryozoan, Common bugula
- Group
- Bryozoans
- Records since 2000
- 539
- Scientific name
- Bugula neritina
Shining Pea Mussel
- Group
- Molluscs
- Records since 2000
- 533
- Scientific name
- Euglesa nitida
Seashore springtail
- Group
- Springtails
- Records since 2000
- 530
- Scientific name
- Anurida maritima
Melodious Warbler
- Group
- Birds
- Records since 2000
- 529
- Scientific name
- Hippolais polyglotta
Ridged Tooth
- Group
- Fungi
- Records since 2000
- 526
- Scientific name
- Hydnellum scrobiculatum
River Jelly Lichen
- Group
- Lichens
- Records since 2000
- 524
- Scientific name
- Lathagrium dichotomum
Ground Ivy Rust
- Group
- Fungi
- Records since 2000
- 520
- Scientific name
- Puccinia glechomatis
Paraonis fulgens
- Group
- Worms (annelids)
- Records since 2000
- 519
- Peak month
- September
Artichoke Gall-midge
- Group
- True flies
- Records since 2000
- 518
- Scientific name
- Taxomyia taxi
Hydroglyphus geminus
- Group
- Beetles
- Records since 2000
- 518
- Peak month
- September
Lauderia mediterranea
- Group
- Seaweeds and algae
- Records since 2000
- 518
- Peak month
- September
Mocydia crocea
- Group
- True bugs
- Records since 2000
- 518
- Peak month
- September
Roundnose grenadier, Roundhead Rat-tail
- Group
- Fish
- Records since 2000
- 518
- Scientific name
- Coryphaenoides rupestris
Sea Strawberry
- Group
- Sea squirts
- Records since 2000
- 518
- Scientific name
- Aplidium elegans
Smittia edwardsi
- Group
- True flies
- Records since 2000
- 516
- Peak month
- September
Pampas Grass
- Group
- Flowering plants
- Records since 2000
- 515
- Scientific name
- Cortaderia selloana
Lesser Gooseberry Sea Squirt
- Group
- Sea squirts
- Records since 2000
- 511
- Scientific name
- Distomus variolosus
Gem anemone
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 508
- Scientific name
- Bunodactis verrucosa
Navicula subminuscula
- Group
- Seaweeds and algae
- Records since 2000
- 508
- Peak month
- September
Greater Streak-moss
- Group
- Mosses
- Records since 2000
- 507
- Scientific name
- Rhabdoweisia crenulata
Laonome kroyeri
- Group
- Worms (annelids)
- Records since 2000
- 507
- Peak month
- September
Euphorbia Rust
- Group
- Fungi
- Records since 2000
- 506
- Scientific name
- Melampsora euphorbiae
Podosphaera erigerontis-canadensis
- Group
- Fungi
- Records since 2000
- 500
- Peak month
- September
Orange Birch Bolete
- Group
- Fungi
- Records since 2000
- 499
- Scientific name
- Leccinum versipelle
Tanytarsus dissimilis
- Group
- True flies
- Records since 2000
- 499
- Peak month
- September
Tomato
- Group
- Flowering plants
- Records since 2000
- 499
- Scientific name
- Solanum lycopersicum
Heath Rustic
- Group
- Butterflies and moths
- Records since 2000
- 495
- Scientific name
- Xestia agathina
Marsh Clubmoss
- Group
- Clubmosses
- Records since 2000
- 494
- Scientific name
- Lycopodiella inundata