Dog's Mercury
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 18,728
Species recorded in Powys
1,168 species
Powys — county
Cinnamon Sedge
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 18,706
Brown Lipped Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 18,559
Common Mouse-ear
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 18,442
Silver-moss
- Group
- Mosses
- Peak month
- November
- Records since 2000
- 18,165
Bilberry
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 18,150
Bank Haircap
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 18,136
White-tipped Bristle-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 18,107
European Eel
- Group
- Fish
- Peak month
- July
- Records since 2000
- 18,003
Gemmabryum dichotomum
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,871
Clustered Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,847
Foxglove
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 17,704
Common Glow-worm
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 17,587
Bluebell
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 17,510
Hedge Woundwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 17,492
Lords-and-Ladies [Arum maculatum]
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 17,452
Heath Star Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,406
Fireweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 17,268
Cherry Laurel
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 17,196
Cylindric Beard-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,033
Red Fescue
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,907
Silky Forklet-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 16,885
Alder
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 16,859
Meadow Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 16,828
Atlantic Salmon
- Group
- Fish
- Peak month
- August
- Records since 2000
- 16,731
False Oat-grass
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,693
Ramsons
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 16,569
Willow Tit
- Group
- Birds
- Peak month
- January
- Records since 2000
- 16,511
Ten-spot Ladybird
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 16,478
Nipplewort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,456
Common Orange Lichen
- Group
- Lichens
- Peak month
- April
- Records since 2000
- 16,366
Meadow Vetchling
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,208
Cowslip
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 16,087
Marsh Thistle
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,059
Slow worm
- Group
- Reptiles
- Peak month
- May
- Records since 2000
- 15,975
Lady's Bedstraw
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,904
Swartz's Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 15,831
White-legged Damselfly, Blue featherleg
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 15,819
Common Bent
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,749
16-spot Ladybird [Halyzia sedecimguttata]
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 15,745
Hart's-tongue
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 15,670
Perennial Rye-grass
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,637
Fallow deer
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 15,521
Grey-spotted Sedgesitter
- Group
- True flies
- Peak month
- April
- Records since 2000
- 15,504
Hover Fly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 15,338
Heath Spotted-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,205
Gorse
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 15,116
Marsh Fritillary
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 14,938