Lesser Celandine
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 21,114
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- Species by county
- Na h-Eileanan Siar
Species recorded in Na h-Eileanan Siar
773 species
Na h-Eileanan Siar — county
Meadow Buttercup
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 20,980
Tormentil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 20,922
Garden Sorrel
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 20,829
Sugar Kelp
- Group
- Seaweeds and algae
- Peak month
- January
- Records since 2000
- 20,817
Hart's-Tongue Thyme-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 20,735
Lesser Knapweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 20,597
Sweet Vernal Grass
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 20,537
Little Tern
- Group
- Birds
- Peak month
- May
- Records since 2000
- 20,325
Common Tamarisk-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 20,226
Long-tailed Duck
- Group
- Birds
- Peak month
- January
- Records since 2000
- 20,221
Greater Scaup
- Group
- Birds
- Peak month
- January
- Records since 2000
- 19,363
Common Mussel
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 18,892
Purple Sandpiper
- Group
- Birds
- Peak month
- January
- Records since 2000
- 18,878
Cinnamon Sedge
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 18,706
Brimstone Moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 18,372
Common Urchin
- Group
- Starfish and sea urchins
- Peak month
- June
- Records since 2000
- 18,230
Bank Haircap
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 18,136
Heart and Dart
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 17,584
Heath Star Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,406
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
Curlew Sandpiper
- Group
- Birds
- Peak month
- September
- Records since 2000
- 16,711
Dark Arches
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 16,454
Twite
- Group
- Birds
- Peak month
- October
- Records since 2000
- 16,436
Common Orange Lichen
- Group
- Lichens
- Peak month
- April
- Records since 2000
- 16,366
Greater White-fronted Goose
- Group
- Birds
- Peak month
- January
- Records since 2000
- 16,291
Lady's Bedstraw
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,904
Little Stint
- Group
- Birds
- Peak month
- September
- Records since 2000
- 15,586
Grey-spotted Sedgesitter
- Group
- True flies
- Peak month
- April
- Records since 2000
- 15,504
Heath Spotted-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,205
Grey seal
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 15,095
Hen Harrier
- Group
- Birds
- Peak month
- January
- Records since 2000
- 14,659
Lesser Bird's-claw Beard-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,503
Snow Bunting
- Group
- Birds
- Peak month
- November
- Records since 2000
- 14,211
Golden Dung Fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 14,206
Cinnabar
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 14,180
Painted Top Shell
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 14,155
Ladder-backed Hover Fly
- Group
- True flies
- Peak month
- April
- Records since 2000
- 14,120
Yellow-browed Warbler
- Group
- Birds
- Peak month
- October
- Records since 2000
- 13,959
Red-stemmed Feather-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 13,899
European green crab, Shore Crab
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 13,886
Glittering Wood-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 13,837
Primrose
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 13,713
Yellow Iris
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 13,607
Silver Y
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 13,462
Mouse-tail Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 13,215
Horned Grebe
- Group
- Birds
- Peak month
- January
- Records since 2000
- 13,082