Gruney is a small, uninhabited island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 in Shetland, Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. It lies north of the Northmavine

Northmavine

Northmavine is a peninsula of Shetland in Scotland. It is in the north west of the island, and contains the villages of Hillswick, Ollaberry, and North Roe...

 peninsula of the Shetland Mainland

Shetland Mainland

The Mainland is the main island of Shetland, Scotland. The island contains Shetland's only burgh, Lerwick, and is the centre of Shetland's ferry and air connections....

, from which it is separated by the Gruney Sound

Sound (geography)

In geography a sound or seaway is a large sea or ocean inlet larger than a bay, deeper than a bight and wider than a fjord; or it may be defined as a narrow sea or ocean channel between two bodies of land ....

.

Gruney has a population of Leach's petrels, one of just two in Shetland. It is not a National Nature Reserve, but the RSPB has a management agreement with the owners. The island is also home to a lighthouse

Lighthouse

A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....

.