Wilding, Stuart (20 June 2008) "Gearraidh Dubh" Geograph. Retrieved 21 August 2009.
geohack.toolforge.org
For example, Haswell-Smith (2004) treats Eileanan Iasgaich (grid referenceNF785186) as a single island of 50 ha, although during some high tides it becomes several tidal islets - none of which are ever connected to the "mainland" of South Uist.