Horse-Hair Fungus
- Group
- Fungi
- Records since 2000
- 539
- Scientific name
- Gymnopus androsaceus
Horse Mushroom
- Group
- Fungi
- Records since 2000
- 535
- Scientific name
- Agaricus arvensis
Purple Laver
- Group
- Seaweeds and algae
- Records since 2000
- 535
- Scientific name
- Porphyra purpurea
Red Sword-grass
- Group
- Butterflies and moths
- Records since 2000
- 532
- Scientific name
- Xylena vetusta
Vermilion Waxcap
- Group
- Fungi
- Records since 2000
- 532
- Scientific name
- Hygrocybe miniata
Grey Shoulder-Knot
- Group
- Butterflies and moths
- Records since 2000
- 531
- Scientific name
- Lithophane ornitopus
Cream Pinkgill
- Group
- Fungi
- Records since 2000
- 525
- Scientific name
- Entoloma sericellum
Florida beard lichen
- Group
- Lichens
- Records since 2000
- 525
- Scientific name
- Usnea florida
Blue Edge Pinkgill
- Group
- Fungi
- Records since 2000
- 523
- Scientific name
- Entoloma serrulatum
Arctic Warbler
- Group
- Birds
- Records since 2000
- 521
- Scientific name
- Phylloscopus borealis
Clavaria falcata
- Group
- Fungi
- Records since 2000
- 521
- Peak month
- October
Saffron Milkcap
- Group
- Fungi
- Records since 2000
- 520
- Scientific name
- Lactarius deliciosus
Bitter Bracket
- Group
- Fungi
- Records since 2000
- 519
- Scientific name
- Amaropostia stiptica
Cymatia coleoptrata
- Group
- True bugs
- Records since 2000
- 516
- Peak month
- October
Aniseed Funnel
- Group
- Fungi
- Records since 2000
- 514
- Scientific name
- Clitocybe odora
Egghead Mottlegill
- Group
- Fungi
- Records since 2000
- 512
- Scientific name
- Panaeolus semiovatus
Isabelline Wheatear
- Group
- Birds
- Records since 2000
- 510
- Scientific name
- Oenanthe isabellina
Dog Stinkhorn
- Group
- Fungi
- Records since 2000
- 508
- Scientific name
- Mutinus caninus
Beech Jellydisc
- Group
- Fungi
- Records since 2000
- 507
- Scientific name
- Neobulgaria pura
Conifer Mazegill
- Group
- Fungi
- Records since 2000
- 506
- Scientific name
- Gloeophyllum sepiarium
Leistus rufomarginatus
- Group
- Beetles
- Records since 2000
- 506
- Peak month
- October
Liberty Cap
- Group
- Fungi
- Records since 2000
- 503
- Scientific name
- Psilocybe semilanceata
Pholoe assimilis
- Group
- Worms (annelids)
- Records since 2000
- 500
- Peak month
- October
Wrinkled Peach
- Group
- Fungi
- Records since 2000
- 498
- Scientific name
- Rhodotus palmatus
Grey Knight
- Group
- Fungi
- Records since 2000
- 496
- Scientific name
- Tricholoma terreum
Upright Coral
- Group
- Fungi
- Records since 2000
- 494
- Scientific name
- Ramaria stricta
Drapetisca socialis
- Group
- Spiders
- Records since 2000
- 487
- Peak month
- October
Fibrous Waxcap
- Group
- Fungi
- Records since 2000
- 485
- Scientific name
- Hygrocybe intermedia
Pallid Swift
- Group
- Birds
- Records since 2000
- 481
- Scientific name
- Apus pallidus
Hen of The Woods
- Group
- Fungi
- Records since 2000
- 477
- Scientific name
- Grifola frondosa
Beige Fibrecap
- Group
- Fungi
- Records since 2000
- 476
- Scientific name
- Inocybe sindonia
Burnt Knight
- Group
- Fungi
- Records since 2000
- 475
- Scientific name
- Tricholoma ustale
Mycena metata
- Group
- Fungi
- Records since 2000
- 475
- Peak month
- October
Yellow-line Quaker
- Group
- Butterflies and moths
- Records since 2000
- 466
- Scientific name
- Agrochola macilenta
Dewdrop Bonnet
- Group
- Fungi
- Records since 2000
- 463
- Scientific name
- Hemimycena tortuosa
Marsh Whorl Snail
- Group
- Molluscs
- Records since 2000
- 463
- Scientific name
- Vertigo antivertigo
Yellowing Knight
- Group
- Fungi
- Records since 2000
- 463
- Scientific name
- Tricholoma scalpturatum
Clustered Domecap
- Group
- Fungi
- Records since 2000
- 462
- Scientific name
- Lyophyllum decastes
Sparassis crispa
- Group
- Fungi
- Records since 2000
- 454
- Peak month
- October
Aquacidia viridifarinosa
- Group
- Lichens
- Records since 2000
- 453
- Peak month
- October
Nemoura avicularis
- Group
- Stoneflies
- Records since 2000
- 449
- Peak month
- October
Ophelina cylindricaudata
- Group
- Worms (annelids)
- Records since 2000
- 448
- Peak month
- October
Stigmella aceris
- Group
- Butterflies and moths
- Records since 2000
- 446
- Peak month
- October
Tubaria conspersa
- Group
- Fungi
- Records since 2000
- 446
- Peak month
- October
Daedalea quercina
- Group
- Fungi
- Records since 2000
- 445
- Peak month
- October
Lactarius pubescens
- Group
- Fungi
- Records since 2000
- 444
- Peak month
- October
Lactarius deterrimus
- Group
- Fungi
- Records since 2000
- 440
- Peak month
- October
Peniophorella praetermissa
- Group
- Fungi
- Records since 2000
- 439
- Peak month
- October