South Stack Cliffs RSPB reserve

South Stack Cliffs RSPB reserve sits on Holy Island in north-west Anglesey, Wales. It is a nature reserve run by the Royal Society for the Protection of Birds, facing the small islet of South Stack. The Anglesey Coastal Path crosses the reserve, and an information centre occupies Elin’s Tower. The cliffs drop steeply to the Irish Sea, offering wide views of the water and sky. The reserve’s geology includes hard volcanic rock and softer sedimentary layers. Wind and waves have carved the cliffs into dramatic shapes over centuries. The reserve is best known for its seabird colonies. Puffins, razorbills, guillemots, kittiwakes and fulmars nest on the ledges each spring. Rare birds such as choughs, peregrine falcons and kestrels also breed here. Visitors sometimes spot rare vagrants like the black lark or grey catbird. The cliffs host a small yellow flower, the Spathulate fleawort, found nowhere else in the world. Silver-studded blue butterflies appear in spring, and Hebridean and Manx sheep graze to keep the grass short. A visitor walks the coastal path to the lighthouse and down to the cliffs. The information centre in Elin’s Tower explains the wildlife and geology. From the cliffs, seabirds circle over the sea below. The wind carries the calls of kittiwakes and guillemots. Sheep graze on the slopes, helping to maintain the open landscape. The reserve shows how cliffs, birds and rare plants come together in one place.