Nationally important populations of breeding waders are present in the Outer Hebrides, including common redshank, dunlin, lapwing and ringed plover. The islands also provide a habitat for other important species such as corncrake, hen harrier, golden eagle and otter. Offshore, basking shark and various species of whale and dolphin can often be seen, and the remoter islands' seabird populations are of international significance. St Kilda has 60,000 northern gannets, amounting to 24% of the world population; 49,000 breeding pairs of Leach's petrel, up to 90% of the European population; and 136,000 pairs of puffin and 67,000 northern fulmar pairs, about 30% and 13% of the respective UK totals. Mingulay is an important breeding ground for razorbills, with 9,514 pairs, 6.3% of the European population.