Wildlife on the Isle of Wight

Biodiversity on the biosphere island

The Isle of Wight supports a remarkable variety of wildlife for its size, a diversity recognised by its designation as a UNESCO Biosphere Reserve in 2019. The island's habitats include chalk downland, ancient woodland, heathland, wetland, soft coastal cliffs, beaches, seagrass beds and the surrounding Solent waters, each supporting its own community of plants and animals.

The red squirrel is the island's most celebrated species, surviving here in numbers that have been lost across almost all of mainland England. The Solent barrier prevents the invasive grey squirrel from establishing, and the island's woodlands, particularly Parkhurst Forest, support a thriving population. Red squirrels are regularly seen in gardens, parks and woodland across the island.

The chalk downland of the central ridge is one of the richest habitats in lowland England for wildflowers and butterflies. Pyramidal orchids, bee orchids, horseshoe vetch, thyme and scabious flower in the short turf grazed by sheep and cattle. The butterflies that depend on these plants include the Adonis blue, the chalkhill blue, the dark green fritillary and the Glanville fritillary, which in mainland Britain is found only on the Isle of Wight's southern cliffs.

The Glanville fritillary is a species of particular significance. This butterfly, with its distinctive orange and black chequered wings, breeds on the warm, south-facing landslips and undercliffs of the island's southern coast. The Isle of Wight is the only place in mainland Britain where it is reliably found, and the colony here is of national conservation importance.

The island's coastline provides habitat for seabirds, waders and wildfowl. The marshes at Brading and Newtown are managed by the RSPB and the National Trust respectively, and both are important sites for birdwatching. Curlew, lapwing, little egret, brent geese, oystercatcher and redshank are among the species seen on the island's estuaries and marshes.

In the surrounding waters, seagrass beds provide habitat for seahorses, cuttlefish and juvenile fish. Dolphins, porpoises and seals are occasionally seen in the Solent and around the island's coast. The island's marine environment is an integral part of the Biosphere Reserve and is the subject of ongoing conservation and monitoring work.

The island's wildlife is a source of pride and a draw for visitors. Nature reserves, wildlife walks and the island's natural history societies provide access and information for those who want to explore the biodiversity that makes the Isle of Wight one of the most ecologically important areas in southern England.

The island's designation as a UNESCO Biosphere Reserve provides a framework for balancing conservation with sustainable development, and the wildlife is a central element of that balance. The island's nature reserves, managed by the RSPB, the National Trust, the Hampshire and Isle of Wight Wildlife Trust and the Isle of Wight Council, provide protected spaces where habitats are maintained and species are monitored. Volunteer wildlife recorders and citizen scientists contribute to the knowledge base, tracking populations and reporting sightings that help conservationists understand the health of the island's ecosystems. For residents, the wildlife is part of the daily experience of island life, from the red squirrel in the garden to the skylark singing over the downs. For visitors, the chance to see species that are rare or absent on the mainland is a genuine draw.