The RSPB nature reserve of Copinsay has a vast seabird colony that includes guillemots, kittiwakes, puffins and razorbills.
The reserve consists of the uninhabited main island of Copinsay, three smaller islets of Corn Holm, Ward Holm, Black Holm and the Horse of Copinsay. More than 1,000 pairs of fulmars nest on Copinsay, which has nearly a mile of vertical cliffs up to 76 m high.
The cliffs also attract around 20,000 guillemots, 700 razorbills, 600 puffins and about 4,500 pairs of kittiwakes. Black guillemots and shags also nest here and there are great black-backed gull colonies.
In autumn, a colony of around 2,000 grey seals comes ashore to pup. Copinsay was bought as a memorial to the naturalist James Fisher.