Great Red Sedge
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 1,166
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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
Leafminer
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 1,163
Crescent
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 1,151
Rim lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 1,138
Jagged Notchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,104
Tortricid moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 1,100
Sea Scalewort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,079
Pseudisothecium interludens
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,066
Ash Bark Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,065
Grey Pug
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 1,057
Lesser Whipwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,012
Pearl-band Grass Veneer
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 1,011
Blunt Cord-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 979
Twiggy Spear-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 971
Pinion-streaked Snout
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 930
Smooth ground beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 926
Rove beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 925
Pontania pedunculi
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 915
Dark-barred Tortrix
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 909
Megasternum concinnum
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 907
Campion
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 904
Dyschirius globosus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 899
Northern Deep-brown Dart
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 896
Common Flat-body
- Group
- Butterflies and moths
- Peak month
- March
- Records since 2000
- 895
Kurokawia runcinata
- Group
- Lichens
- Peak month
- July
- Records since 2000
- 866
Barred Red
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 834
Grass Rivulet
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 834
Treble Bar
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 834
Rove beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 824
Clover Seed Weevil
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 811
Puss Moth
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 803
Northern White-tailed Bumblebee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 795
Yellow-faced Blowfly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 789
Rove beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 788
Marbled Bell
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 781
Thistle Rust
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 776
Cinerous Pearl
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 770
Spring Squill
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 762
Wheat Flea Beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 746
Juniper Prongwort
- Group
- Liverworts
- Peak month
- June
- Records since 2000
- 743
Northern Spinach
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 727
Large Wainscot
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 725
Red Wasp
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 708
Cluster Cup Rust
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 679
Small White-line Dart
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 665
Puccinia obscura
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 657
Heath Fingerwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 618
Puccinia hieracii
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 613