Facts
- Records since 2000
- 313,746
- Species recorded
- 4,690
- Nation
- Scotland
- Type of area
- Island area
Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0)
Most recorded species in Na h-Eileanan Siar
| # | Species | Group | Peak month | Records here |
|---|---|---|---|---|
| 1 | Corn Crake Crex crex | Birds | June | 13,665 |
| 2 | Eurasian Oystercatcher Haematopus ostralegus | Birds | May | 7,188 |
| 3 | Northern Lapwing Vanellus vanellus | Birds | May | 5,719 |
| 4 | Herring Gull Larus argentatus | Birds | April | 4,742 |
| 5 | Common Redshank Tringa totanus | Birds | April | 4,411 |
| 6 | European Starling Sturnus vulgaris | Birds | May | 4,139 |
| 7 | Meadow Pipit Anthus pratensis | Birds | October | 4,004 |
| 8 | Mew Gull Larus canus | Birds | January | 3,779 |
| 9 | Great Black-backed Gull Larus marinus | Birds | October | 3,499 |
| 10 | Graylag Goose Anser anser | Birds | April | 3,434 |
| 11 | Common Ringed Plover Charadrius hiaticula | Birds | May | 3,275 |
| 12 | Hooded Crow Corvus cornix | Birds | May | 3,048 |
| 13 | Dunlin Calidris alpina | Birds | September | 2,957 |
| 14 | Rock Pigeon Columba livia | Birds | April | 2,938 |
| 15 | Mallard Anas platyrhynchos | Birds | April | 2,612 |
| 16 | White Wagtail Motacilla alba | Birds | April | 2,556 |
| 17 | Common Raven Corvus corax | Birds | April | 2,482 |
| 18 | Eurasian Skylark Alauda arvensis | Birds | May | 2,407 |
| 19 | Black-headed Gull Chroicocephalus ridibundus | Birds | January | 2,387 |
| 20 | House Sparrow Passer domesticus | Birds | May | 2,324 |
| 21 | Eurasian Curlew Numenius arquata | Birds | October | 2,306 |
| 22 | Northern Wheatear Oenanthe oenanthe | Birds | April | 2,297 |
| 23 | Northern Gannet Morus bassanus | Birds | July | 2,062 |
| 24 | Eurasian Blackbird Turdus merula | Birds | May | 2,035 |
| 25 | Common Snipe Gallinago gallinago | Birds | October | 2,008 |
| 26 | Gray/Purple Heron Ardea cinerea | Birds | May | 1,862 |
| 27 | Barn Swallow Hirundo rustica | Birds | May | 1,843 |
| 28 | Eurasian Wren Troglodytes troglodytes | Birds | April | 1,817 |
| 29 | European Shag Phalacrocorax aristotelis | Birds | October | 1,793 |
| 30 | Arctic Tern Sterna paradisaea | Birds | May | 1,706 |
| 31 | Tufted Duck Aythya fuligula | Birds | April | 1,676 |
| 32 | Moss Carder Bee Bombus muscorum | Bees, wasps and ants | August | 1,632 |
| 33 | Great Cormorant/European Shag Phalacrocorax carbo | Birds | January | 1,554 |
| 34 | Common Buzzard Buteo buteo | Birds | April | 1,534 |
| 35 | Mute Swan Cygnus olor | Birds | April | 1,519 |
| 36 | Common Eider Somateria mollissima | Birds | May | 1,466 |
| 37 | European Stonechat Saxicola rubicola | Birds | October | 1,440 |
| 38 | Red-breasted Merganser Mergus serrator | Birds | January | 1,394 |
| 39 | European Robin Erithacus rubecula | Birds | April | 1,331 |
| 40 | Lesser Black-backed Gull Larus fuscus | Birds | August | 1,310 |
| 41 | Eurasian Collared-Dove Streptopelia decaocto | Birds | May | 1,306 |
| 42 | Ruddy Turnstone Arenaria interpres | Birds | October | 1,259 |
| 43 | Dark Arches Apamea monoglypha | Butterflies and moths | July | 1,251 |
| 44 | Sanderling Calidris alba | Birds | September | 1,197 |
| 45 | European Goldfinch Carduelis carduelis | Birds | April | 1,192 |
| 46 | European Golden-Plover Pluvialis apricaria | Birds | October | 1,191 |
| 47 | Red-throated Loon Gavia stellata | Birds | October | 1,179 |
| 48 | Eurasian Wigeon Mareca penelope | Birds | January | 1,139 |
| 49 | Common Loon Gavia immer | Birds | January | 1,107 |
| 50 | Rock Pipit Anthus petrosus | Birds | October | 1,101 |
| 51 | Song Thrush Turdus philomelos | Birds | May | 1,047 |
| 52 | Northern Fulmar Fulmarus glacialis | Birds | July | 1,034 |
| 53 | Twite Linaria flavirostris | Birds | October | 1,012 |
| 54 | Common Chaffinch Fringilla coelebs | Birds | April | 995 |
| 55 | Short-eared Owl Asio flammeus | Birds | January | 973 |
| 56 | Eurasian Linnet Linaria cannabina | Birds | April | 967 |
| 57 | Black Guillemot Cepphus grylle | Birds | May | 964 |
| 58 | Large Yellow Underwing Noctua pronuba | Butterflies and moths | August | 949 |
| 59 | Great Skua Stercorarius skua | Birds | September | 943 |
| 60 | Common Cuckoo Cuculus canorus | Birds | May | 939 |