Arctic Tern
- Group
- Birds
- Peak month
- May
- Records since 2000
- 33,992
- Home
- Species by county
- Na h-Eileanan Siar
Species recorded in Na h-Eileanan Siar
773 species
Na h-Eileanan Siar — county
Common frog
- Group
- Amphibians
- Peak month
- March
- Records since 2000
- 33,381
Common Starfish
- Group
- Starfish and sea urchins
- Peak month
- July
- Records since 2000
- 33,273
Common Loon
- Group
- Birds
- Peak month
- January
- Records since 2000
- 32,765
Corn bunting
- Group
- Birds
- Peak month
- May
- Records since 2000
- 32,362
White-throated Dipper
- Group
- Birds
- Peak month
- May
- Records since 2000
- 32,318
Pointed Spear-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 32,268
Large Yellow Underwing
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 31,787
White Clover
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 31,709
Capillary Thread-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 31,536
Grayling [butterfly]
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 30,847
Manx Shearwater
- Group
- Birds
- Peak month
- August
- Records since 2000
- 30,622
Daisy
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 29,849
Yorkshire-fog
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 29,834
Common Hawker
- Group
- Dragonflies and damselflies
- Peak month
- August
- Records since 2000
- 29,798
European otter
- Group
- Mammals
- Peak month
- May
- Records since 2000
- 28,426
Whinchat
- Group
- Birds
- Peak month
- September
- Records since 2000
- 28,416
Great Skua
- Group
- Birds
- Peak month
- September
- Records since 2000
- 28,354
Selfheal
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 28,118
Black Guillemot
- Group
- Birds
- Peak month
- May
- Records since 2000
- 27,934
Yarrow
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 27,652
Common Ragwort
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 27,539
Black Darter
- Group
- Dragonflies and damselflies
- Peak month
- August
- Records since 2000
- 26,741
Parasitic Jaeger
- Group
- Birds
- Peak month
- September
- Records since 2000
- 26,147
Merlin
- Group
- Birds
- Peak month
- October
- Records since 2000
- 26,138
Swan's-neck Thyme-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 25,888
Cuckooflower
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 25,770
Red Crossbill
- Group
- Birds
- Peak month
- October
- Records since 2000
- 25,473
Cuckoo-spit Insect
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 25,331
Neat Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 24,718
Wall Screw-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 24,717
Spear Thistle
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 24,682
Small Garden Bumble Bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 24,422
Common Bird's-foot-trefoil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 24,100
Garden Snail
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 23,914
Bifid Crestwort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 23,907
Heather
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 23,828
Eurasian Woodcock
- Group
- Birds
- Peak month
- January
- Records since 2000
- 23,674
Red Clover
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 23,504
Short-eared Owl
- Group
- Birds
- Peak month
- January
- Records since 2000
- 23,364
Hedgehog
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 23,362
Common Red Soldier Beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 23,196
Broom Fork-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 23,139
Common Grasshopper-Warbler
- Group
- Birds
- Peak month
- April
- Records since 2000
- 23,015
Creeping Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 22,321
Redshank [moss]
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 21,994
Willow Ptarmigan
- Group
- Birds
- Peak month
- April
- Records since 2000
- 21,736
Heath Plait-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 21,593