Achnanthes oblongella
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,248
Species recorded in Conwy
564 species
Conwy — county
Planothidium lanceolatum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,245
Exilaria vaucheriae
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 2,228
Cocconeis euglypta
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,218
Dropwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,211
Gomphonema intricatum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,121
Narrow-fruited Crisp-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,103
Starry Hoar-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,092
Planothidium frequentissimum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,083
Toothed Small Brown
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 2,052
Common Early Brown
- Group
- Stoneflies
- Peak month
- October
- Records since 2000
- 2,046
Fragilaria capucina
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,037
Navicula minima
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,013
Caenis rivulorum
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 2,004
Surf Scoter
- Group
- Birds
- Peak month
- January
- Records since 2000
- 2,003
Encyonema minutum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,002
Encyonema silesiacum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,999
Girgensohn's Bog-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,993
Pale-fruited Thread-moss
- Group
- Mosses
- Peak month
- September
- Records since 2000
- 1,993
Red forklet moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,984
Heath Earwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,975
Lyon's Notchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,973
Taylor's Flapwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,963
Orange-striped Stonefly
- Group
- Stoneflies
- Peak month
- September
- Records since 2000
- 1,953
Hercynian Haircap
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,919
Ditylum brightwellii
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 1,872
Early Needle Fly
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 1,872
Fingered Cowlwort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 1,850
Common February Red
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 1,846
Verdigris Tufa-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,809
Purple-stalked Pocket-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,769
Alpine Haircap
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,748
Alainites muticus
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 1,727
Greater Whipwort
- Group
- Liverworts
- Peak month
- June
- Records since 2000
- 1,703
Alternateleaf archidium moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 1,695
Thick-set Earwort
- Group
- Liverworts
- Peak month
- April
- Records since 2000
- 1,687
Fragilaria gracilis
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,679
Curve-leaved Ditrichum
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,621
Slender Fringe-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,618
River Grimmia
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,582
Appleyard's Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 1,554
Nut-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,549
Palmate Germanderwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,511
Common Neobisid
- Group
- Mites, harvestmen and other arachnids
- Peak month
- March
- Records since 2000
- 1,470
Scarce Small Yellow Sally
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 1,468
Tabellaria flocculosa
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,437
Rhizosolenia delicatula
- Group
- Seaweeds and algae
- Peak month
- June
- Records since 2000
- 1,346
Russow's Bog-moss
- Group
- Mosses
- Peak month
- September
- Records since 2000
- 1,333