The mild climate favours Hiberno-Lusitanian species, such as the Kerry slug, which are to be found in south-west Ireland and the Iberian peninsula. The Kerry slug thrives in the forest's oak trees, and is a "selection feature" of the Special Area of Conservation. Another example of a Lusitanian species to be found in the forest is the Strawberry Tree (Arbutus unedo).Glengarriff Woods Nature Reserve,
