American Skunkcabbage
- Group
- Flowering plants
- Records since 2000
- 2,909
- Scientific name
- Lysichiton americanus
Pustulate revolute loop lichen
- Group
- Lichens
- Records since 2000
- 2,902
- Scientific name
- Hypotrachyna afrorevoluta
Wood Spurge
- Group
- Flowering plants
- Records since 2000
- 2,898
- Scientific name
- Euphorbia amygdaloides
Potamophylax cingulatus
- Group
- Caddisflies
- Records since 2000
- 2,887
- Peak month
- April
Yellow Legged Mining Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 2,875
- Scientific name
- Andrena flavipes
Navicula lanceolata
- Group
- Seaweeds and algae
- Records since 2000
- 2,789
- Peak month
- April
Pied Shieldbug
- Group
- True bugs
- Records since 2000
- 2,789
- Scientific name
- Tritomegas bicolor
Common Pill Woodlouse
- Group
- Crustaceans
- Records since 2000
- 2,783
- Scientific name
- Armadillidium vulgare
Bloody-nosed Beetle
- Group
- Beetles
- Records since 2000
- 2,765
- Scientific name
- Timarcha tenebricosa
Wry-leaved Tamarisk-moss
- Group
- Mosses
- Records since 2000
- 2,759
- Scientific name
- Heterocladium heteropterum
Slender Speedwell
- Group
- Flowering plants
- Records since 2000
- 2,730
- Scientific name
- Veronica filiformis
Dotted Bee-fly
- Group
- True flies
- Records since 2000
- 2,727
- Scientific name
- Bombylius discolor
Ciliated Fringewort
- Group
- Liverworts
- Records since 2000
- 2,711
- Scientific name
- Ptilidium ciliare
Smooth Needle Fly
- Group
- Stoneflies
- Records since 2000
- 2,645
- Scientific name
- Leuctra inermis
Brindled Pug
- Group
- Butterflies and moths
- Records since 2000
- 2,623
- Scientific name
- Eupithecia abbreviata
Golfingia vulgaris
- Group
- Other invertebrates
- Records since 2000
- 2,595
- Peak month
- April
Nectoporus sanmarkii
- Group
- Beetles
- Records since 2000
- 2,581
- Peak month
- April
White comfrey
- Group
- Flowering plants
- Records since 2000
- 2,573
- Scientific name
- Symphytum orientale
Oil beetle
- Group
- Beetles
- Records since 2000
- 2,548
- Scientific name
- Meloe proscarabaeus
Hairy-eyed Flower Fly
- Group
- True flies
- Records since 2000
- 2,543
- Scientific name
- Syrphus torvus
Italian Lords-and-Ladies
- Group
- Flowering plants
- Records since 2000
- 2,525
- Scientific name
- Arum italicum
Green Worm
- Group
- Worms (annelids)
- Records since 2000
- 2,506
- Scientific name
- Allolobophora chlorotica
Kohuhu
- Group
- Flowering plants
- Records since 2000
- 2,461
- Scientific name
- Pittosporum tenuifolium
Moschatel
- Group
- Flowering plants
- Records since 2000
- 2,434
- Scientific name
- Adoxa moschatellina
Hoary Rosette Lichen
- Group
- Lichens
- Records since 2000
- 2,424
- Scientific name
- Physcia aipolia
Black Spleenwort
- Group
- Ferns and horsetails
- Records since 2000
- 2,423
- Scientific name
- Asplenium adiantum-nigrum
Stenophylax permistus
- Group
- Caddisflies
- Records since 2000
- 2,423
- Peak month
- April
Halesus digitatus
- Group
- Caddisflies
- Records since 2000
- 2,398
- Peak month
- April
Leeches
- Group
- Worms (annelids)
- Records since 2000
- 2,391
- Scientific name
- Erpobdella octoculata
Dented Silk-moss
- Group
- Mosses
- Records since 2000
- 2,324
- Scientific name
- Plagiothecium denticulatum
Common Apple-moss
- Group
- Mosses
- Records since 2000
- 2,320
- Scientific name
- Bartramia pomiformis
Thalassionema nitzschioides
- Group
- Seaweeds and algae
- Records since 2000
- 2,297
- Peak month
- April
Fritillary
- Group
- Flowering plants
- Records since 2000
- 2,254
- Scientific name
- Fritillaria meleagris
Polycelis felina
- Group
- Flatworms
- Records since 2000
- 2,250
- Peak month
- April
Red Currant
- Group
- Flowering plants
- Records since 2000
- 2,250
- Scientific name
- Ribes rubrum
Micheli's Least Pouncewort
- Group
- Liverworts
- Records since 2000
- 2,247
- Scientific name
- Lejeunea cavifolia
Exilaria vaucheriae
- Group
- Seaweeds and algae
- Records since 2000
- 2,228
- Peak month
- April
Gymnocheta viridis
- Group
- True flies
- Records since 2000
- 2,220
- Peak month
- April
Hooded Bristle-moss
- Group
- Mosses
- Records since 2000
- 2,218
- Scientific name
- Orthotrichum cupulatum
Brindled Beauty
- Group
- Butterflies and moths
- Records since 2000
- 2,168
- Scientific name
- Lycia hirtaria
Poecilus cupreus
- Group
- Beetles
- Records since 2000
- 2,156
- Peak month
- April
Dasyphora cyanella
- Group
- True flies
- Records since 2000
- 2,144
- Peak month
- April
Butcher's-broom
- Group
- Flowering plants
- Records since 2000
- 2,140
- Scientific name
- Ruscus aculeatus
Common Tarcrust
- Group
- Fungi
- Records since 2000
- 2,140
- Scientific name
- Diatrype stigma
Gorse Weevil
- Group
- Beetles
- Records since 2000
- 2,126
- Scientific name
- Exapion ulicis
Early Dog-violet
- Group
- Flowering plants
- Records since 2000
- 2,094
- Scientific name
- Viola reichenbachiana
Pale Thread-moss
- Group
- Mosses
- Records since 2000
- 2,091
- Scientific name
- Ptychostomum pallens
Pseudo-nitzschia seriata
- Group
- Seaweeds and algae
- Records since 2000
- 2,078
- Peak month
- April