Sibhinis, Siobhanais or Shivinish. is one of the Monach Islands

Monach Islands

Not to be confused with Heysker/Hyskeir or HaskeirThe Monach Islands, also known as Heisker , are an island group west of North Uist in the Outer Hebrides of Scotland...

, lying between Ceann Iar

Ceann Iar

Disambiguation: "Ceann Iar" is a common Scottish placename meaning Western HeadlandCeann Iar is one of the Monach Isles/Heisgeir, to the west of North Uist in the Outer Hebrides. It is a slender island, approximately a mile, or two kilometres long.-Geography:Ceann Iar is the second largest of the...

 and Ceann Ear

Ceann Ear

Disambiguation: "Ceann Ear" is a common Scottish placename meaning Eastern HeadlandCeann Ear is the largest island in the Monach or Heisgeir group off North Uist in north west Scotland. It is in size and connected by sandbanks to Ceann Iar via Sibhinis at low tide. It is said that it was at one...

. It is tidal, and connected at low tide to Ceann Iar by Fadhail Shibhinis, and to Ceann Ear by Faodhail Chinn Ear. It is 16m at its highest point. It is said that it was at one time possible to walk all the way to Baleshare

Baleshare

Baleshare is a flat tidal island in the Outer Hebrides of Scotland.Baleshare lies to the south-west of North Uist. Its economics and community were boosted by the building of a causeway in 1962. The 350m causeway was built by William Tawse Ltd. The island is extremely flat by Hebridean standards,...

, and on to North Uist

North Uist

North Uist is an island and community in the Outer Hebrides of Scotland.-Geography:North Uist is the tenth largest Scottish island and the thirteenth largest island surrounding Great Britain. It has an area of , slightly smaller than South Uist. North Uist is connected by causeways to Benbecula...

, five miles away at low tide. In the 16th century, a large tidal wave was said to have washed this away.