A small island with rugged coasts, steep cliffs, boulder-screes, and grass slopes. Land-uses include sheep-grazing.
The island holds internationally important seabird colonies, with c.130,000 pairs of breeding seabird, including Rissa tridactyla (36,900 pairs) and Uria aalge (29,600 individuals).
BirdLife International (2019) Important Bird Areas factsheet: Stóra Dímun. Downloaded from http://www.birdlife.org on 21/03/2019.