Lesser sand-eel, Raitt's Sandeel
- Group
- Fish
- Records since 2000
- 32,762
- Scientific name
- Ammodytes marinus
Gymnometriocnemus brumalis
- Group
- True flies
- Records since 2000
- 10,852
- Peak month
- December
Salmonella enterica
- Group
- Microorganisms and protists
- Records since 2000
- 3,388
- Peak month
- December
Mottled Umber
- Group
- Butterflies and moths
- Records since 2000
- 2,471
- Scientific name
- Erannis defoliaria
Campylomyza flavipes
- Group
- True flies
- Records since 2000
- 2,470
- Peak month
- December
Campylobacter jejuni
- Group
- Microorganisms and protists
- Records since 2000
- 2,359
- Peak month
- December
Cresponea premnea
- Group
- Lichens
- Records since 2000
- 1,875
- Also known as
- a Lichen
Red ripple bryozoan
- Group
- Bryozoans
- Records since 2000
- 1,569
- Scientific name
- Watersipora subatra
Dicyrtomina saundersi
- Group
- Springtails
- Records since 2000
- 1,088
- Peak month
- December
Paraeuchaeta hebes
- Group
- Crustaceans
- Records since 2000
- 1,013
- Peak month
- December
Hutchins' Hollywort
- Group
- Liverworts
- Records since 2000
- 985
- Scientific name
- Jubula hutchinsiae
Witches' Butter
- Group
- Fungi
- Records since 2000
- 921
- Scientific name
- Tremella mesenterica
Medium-sized bark louse
- Group
- Other insects
- Records since 2000
- 854
- Scientific name
- Ectopsocus petersi
Diaea dorsata
- Group
- Spiders
- Records since 2000
- 765
- Peak month
- December
Asian clam, Prosperity clam, Asiatic clam, Golden Freshwater Clam
- Group
- Molluscs
- Records since 2000
- 742
- Scientific name
- Corbicula fluminea
Springtail
- Group
- Springtails
- Records since 2000
- 739
- Scientific name
- Entomobrya multifasciata
Phyllopsora rosei
- Group
- Lichens
- Records since 2000
- 737
- Also known as
- a Lichen
Pointed Lattice-moss
- Group
- Mosses
- Records since 2000
- 642
- Scientific name
- Dialytrichia mucronata
Parrot Crossbill
- Group
- Birds
- Records since 2000
- 525
- Scientific name
- Loxia pytyopsittacus
Red-crusted Pea Mussel
- Group
- Molluscs
- Records since 2000
- 523
- Scientific name
- Euglesa personata
Eastern Yellow Wagtail
- Group
- Birds
- Records since 2000
- 516
- Scientific name
- Motacilla tschutschensis
Frigate tuna
- Group
- Fish
- Records since 2000
- 506
- Scientific name
- Auxis thazard
Allographa ruiziana
- Group
- Lichens
- Records since 2000
- 498
- Peak month
- December
Tall Pottia
- Group
- Mosses
- Records since 2000
- 497
- Scientific name
- Tortula protobryoides
Metriocnemus eurynotus
- Group
- True flies
- Records since 2000
- 486
- Peak month
- December
Late Fall Oyster Mushroom
- Group
- Fungi
- Records since 2000
- 475
- Scientific name
- Sarcomyxa serotina
Plectiscus impurator
- Group
- Bees, wasps and ants
- Records since 2000
- 457
- Peak month
- December
Euglesa casertana
- Group
- Molluscs
- Records since 2000
- 433
- Peak month
- December
Porrhomma pygmaeum
- Group
- Spiders
- Records since 2000
- 432
- Peak month
- December
Black-throated Dark-throated Thrush
- Group
- Birds
- Records since 2000
- 411
- Scientific name
- Turdus atrogularis
Leptohalysis scottii
- Group
- Microorganisms and protists
- Records since 2000
- 378
- Peak month
- December
Rose rhodobryum moss
- Group
- Mosses
- Records since 2000
- 375
- Scientific name
- Rhodobryum roseum
Dicyrtomina ornata
- Group
- Springtails
- Records since 2000
- 337
- Peak month
- December
Buchananiella continua
- Group
- True bugs
- Records since 2000
- 289
- Peak month
- December
Wrinkle-leaved feather-moss
- Group
- Mosses
- Records since 2000
- 242
- Scientific name
- Rhytidium rugosum
Pertusaria flavida
- Group
- Lichens
- Records since 2000
- 240
- Peak month
- December
Belted Kingfisher
- Group
- Birds
- Records since 2000
- 230
- Scientific name
- Megaceryle alcyon
Atrichopogon winnertzi
- Group
- True flies
- Records since 2000
- 229
- Peak month
- December
American Yellow Warbler
- Group
- Birds
- Records since 2000
- 217
- Scientific name
- Setophaga aestiva
Scops Owl
- Group
- Birds
- Records since 2000
- 215
- Scientific name
- Otus scops
Turdus eunomus
- Group
- Birds
- Records since 2000
- 209
- Peak month
- December
Stagnicola fuscus
- Group
- Molluscs
- Records since 2000
- 207
- Peak month
- December
Rheocricotopus fuscipes
- Group
- True flies
- Records since 2000
- 205
- Peak month
- December
A Lichen
- Group
- Lichens
- Records since 2000
- 199
- Scientific name
- Opegrapha fumosa
Lindbergina aurovittata
- Group
- True bugs
- Records since 2000
- 199
- Peak month
- December
Blyth's Pipit
- Group
- Birds
- Records since 2000
- 197
- Scientific name
- Anthus godlewskii
A lichen
- Group
- Lichens
- Records since 2000
- 192
- Scientific name
- Lecanora sublivescens
Parochlus kiefferi
- Group
- True flies
- Records since 2000
- 186
- Peak month
- December