Fragilaria capucina
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,037
Species recorded in Powys
1,168 species
Powys — county
Pore lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 2,031
Thorn cladonia
- Group
- Lichens
- Peak month
- August
- Records since 2000
- 2,030
Grayling [fish]
- Group
- Fish
- Peak month
- September
- Records since 2000
- 2,023
Delicate Earth-moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 2,020
Dark-green Flapwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 2,013
Navicula minima
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,013
Polycentropus kingi
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 2,005
Rhoicosphenia abbreviata
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,005
Caenis rivulorum
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 2,004
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
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
Spring Sedge
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 1,975
Lyon's Notchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,973
Orange-striped Stonefly
- Group
- Stoneflies
- Peak month
- September
- Records since 2000
- 1,953
Intermediate Hook-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,929
Hercynian Haircap
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,919
Oulimnius tuberculatus
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 1,909
Narrow Mushroom-headed Liverwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,890
Formica lemani
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 1,879
Early Needle Fly
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 1,872
Lemon-scented Fern
- Group
- Ferns and horsetails
- Peak month
- July
- Records since 2000
- 1,867
Fingered Cowlwort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 1,850
Navicula cryptotenella
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,848
Common February Red
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 1,846
Ringless Hook-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,833
Orange Mosscap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,826
Hooked Scorpion-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,824
Slimy Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,813
Verdigris Tufa-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,809
Marsh Ragwort
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,781
Bronze Furrow Bee
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 1,770
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
Brassy Mining Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 1,746
Hazel dormouse
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 1,733
Claw-leaved Hook-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,730
Alainites muticus
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 1,727
Green Drake
- Group
- Mayflies
- Peak month
- May
- Records since 2000
- 1,718
Alternateleaf archidium moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 1,695
Forcipated Pincerwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,689
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
Pink Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,677
Petty Pocket-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 1,663