Fabricius' Nomad Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 1,397
- Scientific name
- Nomada fabriciana
Sand Gaper, Softshell clam, Long necked clam, Steamer clam
- Group
- Molluscs
- Records since 2000
- 1,391
- Scientific name
- Mya arenaria
Lecania lichen
- Group
- Lichens
- Records since 2000
- 1,379
- Scientific name
- Lecania cyrtella
Limnophyes natalensis
- Group
- True flies
- Records since 2000
- 1,366
- Peak month
- April
Kirkegaardia dorsobranchialis
- Group
- Worms (annelids)
- Records since 2000
- 1,359
- Peak month
- April
Common Boulder Lichen
- Group
- Lichens
- Records since 2000
- 1,342
- Scientific name
- Porpidia macrocarpa
Willow Fly
- Group
- Stoneflies
- Records since 2000
- 1,342
- Scientific name
- Leuctra geniculata
Emperor
- Group
- Butterflies and moths
- Records since 2000
- 1,324
- Scientific name
- Saturnia pavonia
Spring small dung beetle
- Group
- Beetles
- Records since 2000
- 1,316
- Scientific name
- Melinopterus prodromus
Red-belted Cleaver
- Group
- Bees, wasps and ants
- Records since 2000
- 1,308
- Scientific name
- Aglaostigma aucupariae
Lauderia annulata
- Group
- Seaweeds and algae
- Records since 2000
- 1,279
- Peak month
- April
Centraloecetes kroyeranus
- Group
- Crustaceans
- Records since 2000
- 1,278
- Peak month
- April
Nettle Rash
- Group
- Fungi
- Records since 2000
- 1,269
- Scientific name
- Leptosphaeria acuta
Chestnut Worm
- Group
- Worms (annelids)
- Records since 2000
- 1,255
- Scientific name
- Lumbricus castaneus
Hyacinthoides
- Group
- Flowering plants
- Records since 2000
- 1,241
- Scientific name
- Hyacinthoides massartiana
Rim lichen
- Group
- Lichens
- Records since 2000
- 1,237
- Scientific name
- Glaucomaria carpinea
Mougeot's Rock-shield
- Group
- Lichens
- Records since 2000
- 1,232
- Scientific name
- Xanthoparmelia mougeotii
Oregon-grape
- Group
- Flowering plants
- Records since 2000
- 1,230
- Scientific name
- Mahonia aquifolium
Large Dark Olive
- Group
- Mayflies
- Records since 2000
- 1,228
- Scientific name
- Baetis rhodani
Surirella brebissonii
- Group
- Seaweeds and algae
- Records since 2000
- 1,226
- Peak month
- April
Powdered Quaker
- Group
- Butterflies and moths
- Records since 2000
- 1,220
- Scientific name
- Orthosia gracilis
Gomphonema olivaceoides
- Group
- Seaweeds and algae
- Records since 2000
- 1,219
- Peak month
- April
Asterionella glacialis
- Group
- Seaweeds and algae
- Records since 2000
- 1,214
- Peak month
- April
Henbit Dead-nettle
- Group
- Flowering plants
- Records since 2000
- 1,207
- Scientific name
- Lamium amplexicaule
Starry Thyme-moss
- Group
- Mosses
- Records since 2000
- 1,204
- Scientific name
- Mnium stellare
Black-crowned Night-Heron
- Group
- Birds
- Records since 2000
- 1,194
- Scientific name
- Nycticorax nycticorax
Spanish Daffodil
- Group
- Flowering plants
- Records since 2000
- 1,194
- Scientific name
- Narcissus hispanicus
Yellow May Dun
- Group
- Mayflies
- Records since 2000
- 1,186
- Scientific name
- Heptagenia sulphurea
Culicoides chiopterus
- Group
- True flies
- Records since 2000
- 1,181
- Peak month
- April
Helophorus obscurus
- Group
- Beetles
- Records since 2000
- 1,165
- Peak month
- April
Meridion circulare
- Group
- Seaweeds and algae
- Records since 2000
- 1,162
- Peak month
- April
Large Brook Dun
- Group
- Mayflies
- Records since 2000
- 1,160
- Scientific name
- Ecdyonurus torrentis
Diarthonis spadicea
- Group
- Lichens
- Records since 2000
- 1,150
- Peak month
- April
Hawthorn Leaf Beetle
- Group
- Beetles
- Records since 2000
- 1,135
- Scientific name
- Lochmaea crataegi
Beechmast Candlesnuff
- Group
- Fungi
- Records since 2000
- 1,134
- Scientific name
- Xylaria carpophila
Common Lungwort
- Group
- Flowering plants
- Records since 2000
- 1,134
- Scientific name
- Pulmonaria officinalis
Swiss glass-snail
- Group
- Molluscs
- Records since 2000
- 1,123
- Scientific name
- Oxychilus navarricus
Tachina ursina
- Group
- True flies
- Records since 2000
- 1,121
- Peak month
- April
Southern Crestwort
- Group
- Liverworts
- Records since 2000
- 1,117
- Scientific name
- Lophocolea semiteres
Brittle Cinder
- Group
- Fungi
- Records since 2000
- 1,110
- Scientific name
- Kretzschmaria deusta
White-legged Snake Millipede
- Group
- Millipedes
- Records since 2000
- 1,102
- Scientific name
- Tachypodoiulus niger
Bear's-breech
- Group
- Flowering plants
- Records since 2000
- 1,099
- Scientific name
- Acanthus mollis
Strawberry Anemone
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 1,093
- Scientific name
- Actinia fragacea
Microprotopus maculatus
- Group
- Crustaceans
- Records since 2000
- 1,083
- Peak month
- April
Common Mourning Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 1,080
- Scientific name
- Melecta albifrons
Tipula rufina
- Group
- True flies
- Records since 2000
- 1,078
- Peak month
- April
European ground beetle
- Group
- Beetles
- Records since 2000
- 1,077
- Scientific name
- Carabus nemoralis
Tipula vittata
- Group
- True flies
- Records since 2000
- 1,077
- Peak month
- April