The Loch of Spiggie was formed by a sand-bar cutting off a shallow voe from the sea. Both lochs have slightly brackish waters. The IBA also includes the smaller Loch of Hinwell. The site is important for wintering wildfowl.
BirdLife International (2022) Important Bird Areas factsheet: Lochs of Spiggie and Brow. Downloaded from
http://www.birdlife.org on 29/01/2022.