Na H-Eileanan Siar

The Outer Hebrides () or Western Isles ( gd, Na h-Eileanan Siar or or ("islands of the strangers"); sco, Waster Isles), sometimes known as the Long Isle/Long Island ( gd, An t-Eilean Fada, links=no), is an island chain off the west coast of mainland Scotland. The islands are geographically coextensive with , one of the 32 unitary council areas of Scotland. They form part of the archipelago of the Hebrides, separated from the Scottish mainland and from the Inner Hebrides by the waters of the Minch, the Little Minch, and the Sea of the Hebrides. Scottish Gaelic is the predominant spoken language, although in a few areas English speakers form a majority.

Most of the islands have a bedrock formed from ancient metamorphic rocks, and the climate is mild and oceanic. The 15 inhabited islands have a total population of and there are more than 50 substantial uninhabited islands. The distance from Barra Head to the Butt of Lewis is roughly .

There are various important prehistoric structures, many of which pre-date the first written references to the islands by Roman and Greek authors. The Western Isles became part of the Norse kingdom of the ', which lasted for over 400 years, until sovereignty over the Outer Hebrides was transferred to Scotland by the Treaty of Perth in 1266. Control of the islands was then held by clan chiefs, principal amongst whom were the MacLeods, MacDonalds, Mackenzies and MacNeils. The Highland Clearances of the 19th century had a devastating effect on many communities, and it is only in recent years that population levels have ceased to decline. Much of the land is now under local control, and commercial activity is based on tourism, crofting, fishing, and weaving.

Sea transport is crucial, and a variety of ferry services operate between the islands and to mainland Scotland. Modern navigation systems now minimise the dangers, but in the past the stormy seas have claimed many ships. Religion, music and sport are important aspects of local culture, and there are numerous designated conservation areas to protect the natural environment.

Geography

The islands form an archipelago whose major islands are Lewis and Harris, North Uist, Benbecula, South Uist, and Barra. Lewis and Harris has an area of Haswell-Smith (2004) p. 289 and is the largest island in Scotland and the third-largest in the British Isles, after Great Britain and Ireland. It incorporates Lewis in the north and Harris in the south, both of which are frequently referred to as individual islands, although they are connected by land. The island does not have a single name in either English or Gaelic, and is referred to as "Lewis and Harris", "Lewis with Harris", "Harris with Lewis" etc.Thompson (1968) p. 13

The largest islands are deeply indented by arms of the sea such as Loch Ròg, Loch Seaforth and Loch nam Madadh. There are also more than 7,500 freshwater lochs in the Outer Hebrides, about 24% of the total for the whole of Scotland."Botanical survey of Scottish freshwater lochs"
SNH Information and Advisory Note Number 4. Retrieved 1 January 2010. North and South Uist and Lewis, in particular, have landscapes with a high percentage of fresh water and a maze and complexity of loch shapes. Harris has fewer large bodies of water but has innumerable small lochans. Loch Langavat on Lewis is long, and has several large islands in its midst, including Eilean Mòr. Although Loch Suaineabhal has only 25% of Loch Langavat's surface area, it has a mean depth of and is the most voluminous on the island. Of Loch Sgadabhagh on North Uist it has been said that "there is probably no other loch in Britain which approaches Loch Scadavay in irregularity and complexity of outline." Loch Bì is South Uist's largest loch and at long it all but cuts the island in two.

Much of the western coastline of the islands is machair, a fertile low-lying dune pastureland. Lewis is comparatively flat, and largely consists of treeless moors of blanket peat. The highest eminence is Mealisval at in the south west. Most of Harris is mountainous, with large areas of exposed rock and Clisham, the archipelago's only Corbett, reaches in height. North and South Uist and Benbecula (sometimes collectively referred to as The Uists) have sandy beaches and wide cultivated areas of machair to the west and virtually uninhabited mountainous areas to the east. The highest peak here is Beinn Mhòr at . The Uists and their immediate outliers have a combined area of . This includes the Uists themselves and the islands linked to them by causeways and bridges. Barra is in extent and has a rugged interior, surrounded by machair and extensive beaches.

The scenic qualities of the islands are reflected in the fact that three of Scotland's forty national scenic areas (NSAs) are located here. The national scenic areas are defined so as to identify areas of exceptional scenery and to ensure its protection from inappropriate development, and are considered to represent the type of scenic beauty "popularly associated with Scotland and for which it is renowned". The three NSA within the Outer Hebrides are:

*South Lewis, Harris and North Uist National Scenic Area covers the mountainous south west of Lewis, all of Harris, the Sound of Harris and the northern part of North Uist.
*An area of the south west coast of South Uist is designated as the ''South Uist Machair National Scenic Area''.
*The archipelago of St Kilda is also listed as an NSA, alongside many other conservation designations.

Flora and fauna

Much of the archipelago is a protected habitat, including both the islands and the surrounding waters. There are 53 Sites of Special Scientific Interest of which the largest are Loch an Duin, North Uist () and North Harris (). South Uist is considered the best place in the UK for the aquatic plant Slender Naiad, which is a European Protected Species.

There has been considerable controversy over hedgehogs on the Uists. Hedgehogs are not native to the islands but were introduced in the 1970s to reduce garden pests. Their spread posed a threat to the eggs of ground-nesting wading birds. In 2003 Scottish Natural Heritage undertook culls of hedgehogs in the area, but these were halted in 2007; trapped animals are now relocated to the mainland.

Nationally important populations of breeding waders are present in the Outer Hebrides, including common redshank, dunlin, lapwing and ringed plover. The islands also provide a habitat for other important species such as corncrake, hen harrier, golden eagle and otter. Offshore, basking shark and various species of whale and dolphin can often be seen, and the remoter islands' seabird populations are of international significance. St Kilda has 60,000 northern gannets, amounting to 24% of the world population; 49,000 breeding pairs of Leach's petrel, up to 90% of the European population; and 136,000 pairs of puffin and 67,000 northern fulmar pairs, about 30% and 13% of the respective UK totals. Mingulay is an important breeding ground for razorbills, with 9,514 pairs, 6.3% of the European population.

The bumblebee ''Bombus jonellus'' var. ''hebridensis'' is endemic to the Hebrides and there are local variants of the dark green fritillary and green-veined white butterflies. The St Kilda wren is a subspecies of wren whose range is confined to the islands whose name it bears.

Population

The islands' total population was 26,502 at the 2001 census, and the 2011 figure was 27,684. During the same period Scottish island populations as a whole grew by 4% to 103,702. The largest settlement in the Outer Hebrides is Stornoway on Lewis,"Factfile:Population"
. . Retrieved 20 July 2013. which has a population of about 8,100.

The population estimate for 2019 was 26,720 according to a Comhairle nan Eilean Siar report which added that "the population of the Outer Hebrides is ageing" and that "young adults ..leave the islands for further education or employment purposes". Of the total population, 6,953 people reside in the "Stornoway settlement Laxdale (Lacasdal), Sandwick (Sanndabhaig) and Newmarket" with the balance distributed over 280 townships.

In addition to the major North Ford (') and South Ford causeways that connect North Uist to Benbecula via the northern of the Grimsays, and another causeway from Benbecula to South Uist, several other islands are linked by smaller causeways or bridges. Great Bernera and Scalpay have bridge connections to Lewis and Harris respectively, with causeways linking Baleshare and Berneray to North Uist; Eriskay to South Uist; , and the southern Grimsay to Benbecula; and Vatersay to Barra."Get-a-map"
Ordnance Survey. Retrieved 1–15 August 2009."Fleet Histories"
Caledonian MacBrayne. Retrieved 3 August 2009. This means that all the inhabited islands are now connected to at least one other island by a land transport route.

Uninhabited islands

There are more than fifty uninhabited islands greater in size than in the Outer Hebrides, including the Barra Isles, Flannan Isles, Monach Islands, the Shiant Islands and the islands of . In common with the other main island chains of Scotland, many of the more remote islands were abandoned during the 19th and 20th centuries, in some cases after continuous habitation since the prehistoric period. More than 35 such islands have been identified in the Outer Hebrides alone. On Barra Head, for example, Historic Scotland have identified eighty-three archaeological sites on the island, the majority being of a pre-medieval date. In the 18th century, the population was over fifty, but the last native islanders had left by 1931. The island became completely uninhabited by 1980 with the automation of the lighthouse.

Some of the smaller islands continue to contribute to modern culture. The "Mingulay Boat Song", although evocative of island life, was written after the abandonment of the island in 1938 and Taransay hosted the BBC
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