Atlantic lejeunea
- Group
- Liverworts
- Records since 2000
- 184
- Scientific name
- Lejeunea mandonii
Blue Rock Thrush
- Group
- Birds
- Records since 2000
- 184
- Scientific name
- Monticola solitarius
Sociable Plover
- Group
- Birds
- Records since 2000
- 184
- Scientific name
- Vanellus gregarius
Melaspilea lentiginosa
- Group
- Fungi
- Records since 2000
- 183
- Peak month
- December
Goose barnacle
- Group
- Crustaceans
- Records since 2000
- 179
- Scientific name
- Lepas anatifera
Henslow's Pea Mussel
- Group
- Molluscs
- Records since 2000
- 177
- Scientific name
- Euglesa henslowana
Brunnich's Guillemot
- Group
- Birds
- Records since 2000
- 175
- Scientific name
- Uria lomvia
Dicyrtoma fusca
- Group
- Springtails
- Records since 2000
- 172
- Peak month
- December
A Lichen
- Group
- Lichens
- Records since 2000
- 163
- Scientific name
- Reichlingia zwackhii
A lichen
- Group
- Lichens
- Records since 2000
- 161
- Scientific name
- Cryptolechia carneolutea
Grimmia orbicularis
- Group
- Mosses
- Records since 2000
- 152
- Peak month
- December
Epicaecilius pilipennis
- Group
- Other insects
- Records since 2000
- 151
- Peak month
- December
Cup lichen
- Group
- Lichens
- Records since 2000
- 146
- Scientific name
- Cladonia phyllophora
Lesser Crested Tern
- Group
- Birds
- Records since 2000
- 138
- Scientific name
- Thalasseus bengalensis
Ocys tachysoides
- Group
- Beetles
- Records since 2000
- 134
- Peak month
- December
Bactrospora corticola
- Group
- Lichens
- Records since 2000
- 133
- Peak month
- December
Dicranopalpus larvatus
- Group
- Mites, harvestmen and other arachnids
- Records since 2000
- 132
- Peak month
- December
Peripsocus milleri
- Group
- Other insects
- Records since 2000
- 132
- Peak month
- December
Ivory Gull
- Group
- Birds
- Records since 2000
- 129
- Scientific name
- Pagophila eburnea
Klebsiella oxytoca
- Group
- Microorganisms and protists
- Records since 2000
- 115
- Peak month
- December
A lichen
- Group
- Lichens
- Records since 2000
- 111
- Scientific name
- Leptogium hibernicum
A Pinhead lichen
- Group
- Lichens
- Records since 2000
- 106
- Scientific name
- Calicium lenticulare
Ceratobarys decipiens
- Group
- True flies
- Records since 2000
- 106
- Peak month
- December
Targionia hypophylla
- Group
- Liverworts
- Records since 2000
- 104
- Peak month
- December
Baltimore Oriole
- Group
- Birds
- Records since 2000
- 97
- Scientific name
- Icterus galbula
Agaricochara latissima
- Group
- Beetles
- Records since 2000
- 96
- Peak month
- December
Stigmina carpophila
- Group
- Fungi
- Records since 2000
- 96
- Peak month
- December
Eagle Owl
- Group
- Birds
- Records since 2000
- 95
- Scientific name
- Bubo bubo
Winter jasmine
- Group
- Flowering plants
- Records since 2000
- 94
- Scientific name
- Jasminum nudiflorum
Bent-moss
- Group
- Mosses
- Records since 2000
- 92
- Scientific name
- Campylostelium saxicola
A lichen
- Group
- Lichens
- Records since 2000
- 91
- Scientific name
- Varicellaria velata
A lichen
- Group
- Lichens
- Records since 2000
- 90
- Scientific name
- Reichlingia dendritica
Badhamia utricularis
- Group
- Microorganisms and protists
- Records since 2000
- 90
- Peak month
- December
Flamingo moss
- Group
- Mosses
- Records since 2000
- 89
- Scientific name
- Tortula cernua
Lichenoconium xanthoriae
- Group
- Fungi
- Records since 2000
- 89
- Peak month
- December
Thekopsora areolata
- Group
- Fungi
- Records since 2000
- 89
- Peak month
- December
Boreus hyemalis
- Group
- Other insects
- Records since 2000
- 87
- Peak month
- December
Stiffleaf cheesewood
- Group
- Flowering plants
- Records since 2000
- 84
- Scientific name
- Pittosporum crassifolium
Laurer’s catillaria
- Group
- Lichens
- Records since 2000
- 81
- Scientific name
- Megalaria laureri
Sphaerium nucleus
- Group
- Molluscs
- Records since 2000
- 79
- Peak month
- December
Pontastacus leptodactylus
- Group
- Crustaceans
- Records since 2000
- 73
- Peak month
- December
Parisotoma notabilis
- Group
- Springtails
- Records since 2000
- 72
- Peak month
- December
Rhynchostegiella litorea
- Group
- Mosses
- Records since 2000
- 69
- Peak month
- December
Euglesa supina
- Group
- Molluscs
- Records since 2000
- 68
- Peak month
- December
Granulobasidium vellereum
- Group
- Fungi
- Records since 2000
- 67
- Peak month
- December
Trichopsocus clarus
- Group
- Other insects
- Records since 2000
- 66
- Peak month
- December
A lichen
- Group
- Fungi
- Records since 2000
- 64
- Scientific name
- Pyrenula nitida
Cerrena unicolor
- Group
- Fungi
- Records since 2000
- 64
- Peak month
- December