Brook Lamprey
- Group
- Fish
- Peak month
- September
- Records since 2000
- 2,399
Species recorded in Powys
1,168 species
Powys — county
Halesus digitatus
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 2,398
Glossosoma boltoni
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 2,394
Leeches
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 2,391
Green Pocket-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,389
Two-banded longhorn beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 2,388
Inflated Notchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 2,387
Smudge-veined Fen Fly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 2,378
Pebbled Pixie-cup
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 2,374
Dented Silk-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 2,324
Common Apple-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 2,320
Orange-legged Furrow Bee
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 2,303
Synedra dissipata
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,300
Alpine Thread-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,292
Five-ranked Bog-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,283
Flea Sedge
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,272
Straw Spear-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,266
Rough Violet Ground Beetle
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 2,265
Alpine Water-moss
- Group
- Mosses
- Peak month
- August
- Records since 2000
- 2,254
Nitzschia palea
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,250
Oily Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,250
Polycelis felina
- Group
- Flatworms
- Peak month
- April
- Records since 2000
- 2,250
Achnanthes oblongella
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,248
Micheli's Least Pouncewort
- Group
- Liverworts
- Peak month
- April
- Records since 2000
- 2,247
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
Many-fruited Leskea
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,223
Cocconeis euglypta
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,218
Earthy Powdercap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,213
Bog Pondweed
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,185
Drab Brook-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,182
Common Water-starwort
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,169
Western Gorse
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,129
Gomphonema intricatum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,121
Bitter-vetch
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 2,120
Delicate Germanderwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 2,119
Meadow Coral
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,112
Narrow-fruited Crisp-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,103
False Chanterelle
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,094
Slender Ditrichum
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,093
Pale Thread-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 2,091
Planothidium frequentissimum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,083
Seine riverbank ground beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 2,082
Heath Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,062
Toothed Small Brown
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 2,052
Star Pinkgill
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,050
Common Early Brown
- Group
- Stoneflies
- Peak month
- October
- Records since 2000
- 2,046
New Zealand Willowherb
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,041