Reimeria sinuata
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,874
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- Species by county
- Monmouthshire
Species recorded in Monmouthshire
476 species
Monmouthshire — county
Brook-side Feather-moss
- Group
- Mosses
- Peak month
- August
- Records since 2000
- 2,861
Smaller
- Group
- Mosses
- Peak month
- June
- Records since 2000
- 2,849
Schreber's dicranella moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 2,800
Navicula lanceolata
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 2,789
Cocconeis placentula
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,767
Beech Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,764
Common Bladder Snail
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 2,764
Curled Hook-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,761
Amphora pediculus
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,661
Cylindric Ditrichum
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 2,655
Short-leaved Pocket-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,614
Hairy Whirligig
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 2,611
Crisped Neckera
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,601
Nectoporus sanmarkii
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 2,581
Slender Bristle-moss
- Group
- Mosses
- Peak month
- February
- Records since 2000
- 2,581
Matted Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,494
Wall Cotoneaster
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 2,486
Velvet Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,430
Aphelocheirus aestivalis
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 2,422
Shaw's Bristle-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,410
Late Needle Fly
- Group
- Stoneflies
- Peak month
- September
- Records since 2000
- 2,409
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
Whirlpool Ramshorn
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 2,334
Synedra dissipata
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,300
Nitzschia palea
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,250
Polycelis felina
- Group
- Flatworms
- Peak month
- April
- Records since 2000
- 2,250
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
Margined Ramshorn
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 2,217
Gomphonema intricatum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,121
Planothidium frequentissimum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,083
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
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
Greater Pond-sedge
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 1,868
Navicula cryptotenella
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,848
Spanish Bluebell
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 1,801
Hazel dormouse
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 1,733
Green Drake
- Group
- Mayflies
- Peak month
- May
- Records since 2000
- 1,718
Marbled Sedge
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 1,687