Large White-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 3,142
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- Species by county
- Gwynedd
Species recorded in Gwynedd
1,346 species
Gwynedd — county
Large Heath
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 3,140
Navicula gregaria
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 3,118
Austrolimnophila ochracea
- Group
- True flies
- Peak month
- June
- Records since 2000
- 3,117
Jagged Germanderwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 3,112
Tree-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 3,106
Northern Peatmoss
- Group
- Mosses
- Peak month
- August
- Records since 2000
- 3,074
Baltic Tellin
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 3,070
Bogbean
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 3,067
Fluffy Dust Lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 3,067
Small fleck-winged snipefly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 3,047
Olive Beard Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 3,036
Yellow Map Lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 3,025
Spiral Wrack
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 3,016
Lesser Cow-horn Bog-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 3,000
Spiky Bog-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 3,000
Bulbous Rush
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,996
Parelle
- Group
- Lichens
- Peak month
- July
- Records since 2000
- 2,976
Marshpepper Knotweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 2,959
Bitter fluff-wart
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 2,956
Rough Periwinkle
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 2,933
Night-flying Dung Beetle
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 2,931
Darkened Button Lichen
- Group
- Lichens
- Peak month
- June
- Records since 2000
- 2,926
Marsh Cinquefoil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,914
Black-horned Smoothtail
- Group
- True flies
- Peak month
- July
- Records since 2000
- 2,911
American Skunkcabbage
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 2,909
Pustulate revolute loop lichen
- Group
- Lichens
- Peak month
- April
- Records since 2000
- 2,902
Elf Ears lichen
- Group
- Fungi
- Peak month
- March
- Records since 2000
- 2,899
Anoplotrupes stercorosus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 2,888
Potamophylax cingulatus
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 2,887
Gomphonema parvulum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,885
Reimeria sinuata
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,874
Yellow spotted sedge
- Group
- Caddisflies
- Peak month
- May
- Records since 2000
- 2,862
Brook-side Feather-moss
- Group
- Mosses
- Peak month
- August
- Records since 2000
- 2,861
Butter Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,860
Smaller
- Group
- Mosses
- Peak month
- June
- Records since 2000
- 2,849
Pertusaria pertusa
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 2,835
Codriophorus aquaticus
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 2,831
Common Script Lichen
- Group
- Lichens
- Peak month
- March
- Records since 2000
- 2,809
Strict Haircap
- Group
- Mosses
- Peak month
- September
- Records since 2000
- 2,802
Bog-moss Flapwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 2,799
Navicula lanceolata
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 2,789
Common Pill Woodlouse
- Group
- Crustaceans
- Peak month
- April
- Records since 2000
- 2,783
Cocconeis placentula
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 2,767
Bloody-nosed Beetle
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 2,765
Common Bladder Snail
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 2,764
Wry-leaved Tamarisk-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 2,759
Crumb-of-bread sponge
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 2,758