Fetlar is one of the northernmost of the Shetland Islands in northern Scotland. The SPA comprises a range of habitats including species-rich heathland, marshes and lochans, cliffs and rocky shores. The principal areas of importance for birds are the northernmost part of the island and the south-western peninsula of Lamb Hoga. Most of the north of the island is vegetated by heathland and relatively species-poor grasslands owing to the influence of underlying serpentine-base-rich rocks. In wetter areas, small lochs and sedge-rich mires are present. Around the coasts are floristically rich maritime grasslands and heathlands. Lamb Hoga has heather moorland with areas of Cottongrass Eriophorum spp. dominated blanket bog. Fetlar SPA is of importance for a number of northern breeding waders, as well as breeding seabirds, which nest especially on the moorlands as well as in some of the other wetlands.