Noss is located on the east coast of the island of Bressay, to the east of mainland Shetland in northern Scotland. The site comprises high cliffs of Old Red Sandstone that reach 180 m. The steeper eastern part of the island is covered with maritime grassland and Calluna/Eriophorum heath, whilst lower land to the west is semi-intensified grassland. The horizontal bedding planes of the sandstone cliffs result in a high density of ledges suitable for nesting seabirds and accordingly the site supports large numbers of auks, gulls and Gannet Morus bassanus. On moorland areas large numbers of Great SkuaCatharacta skua breed. The seabirds nesting on Noss feed outside the SPA in the immediately surrounding waters, as well as further away in the North Sea.