Ariundle Oakwood National Nature Reserve, near Strontian, is an important remnant of an ancient coastal oakwood that formerly stretched along the Atlantic coast from Spain and Portugal to Norway. Its trees, mainly sessile oak and pedunculate oak, are strewn with a diverse collection of mosses, liverworts, lichens and epiphytic ferns. The woodland also supports a large invertebrate community, including the rare chequered skipper, pearl bordered fritillary and small pearl bordered fritillary.