Most of Shetland is covered in blanket bog mainly consisting of peat, one of the rarest wildlife habitats in the world. Construction of the Shetland Gas Plant (SGP) required the stripping of a layer of this peat. Early surveys of the area proposed for SGP and its associated pipelines recorded significant numbers of otters living and breeding in the area. The import pipeline landfall was shown to be a particularly important area, with two otter (lutra lutra) families living there. The area is also home to numerous species of nesting birds.