British Seabirds, the complete guide

Britain hosts internationally important seabird populations: 8 million breeding seabirds, half the world's Manx shearwaters, half its gannets. Here's what to see and where.

UK seabirds are a global story. The cliffs of the north and west are stuffed with breeding auks, gannets, fulmars, kittiwakes from May to August. Late summer pelagics serve up shearwaters and petrels driven north by Atlantic storms. Autumn sea-watching from headlands is one of British birding's most thrilling activities.

The breeding spectacle (May–August)

Gannet

Britain holds ~60% of the world population. Biggest colonies: Bass Rock (East Lothian, ~75,000 pairs: see them at near-touch distance from boat tours), Grassholm (Pembrokeshire), Ailsa Craig (Firth of Clyde), Bempton Cliffs.

Atlantic Puffin

The icon. Best easy access: Skomer (Pembrokeshire), Bempton (Yorkshire), Farne Islands (Northumberland). Handa (NW Scotland) for the most dramatic setting. Mid-June to mid-July is peak.

Razorbill, Guillemot, Kittiwake, Fulmar

Same colonies as puffin. Razorbill is the smaller, blacker-looking auk; guillemot is the chocolate-brown one. Kittiwake is the gentle gull on cliff ledges saying its own name.

Manx Shearwater

Half the world breeds in Wales (Skomer + Skokholm) and Rum (Inner Hebrides). Returns to burrows after dark to avoid gull predation. Stay overnight on Skomer for the spectacle.

Storm Petrel + Leach's Petrel

Tiny tube-noses. Storm Petrel breeds on remote islands (Mousa Broch in Shetland; St Kilda; Skellig Michael in Ireland). Leach's much rarer.

Pelagic specialties (July–September)

For the deep-water wanderers, you need a boat or the right wind:

Cory's Shearwater, Great Shearwater: Mediterranean / South Atlantic visitors. Best seen on Scilly pelagics.
Sooty Shearwater: long-distance migrant from southern hemisphere. Off western coasts after gales.
Wilson's Storm Petrel: early Sept off SW; dedicated pelagics.
Sabine's Gull: pelagic gull; passage off Cornish + Welsh headlands.

Sea-watching from land

Long-distance birds can be picked up from headlands in onshore winds. Best UK sites:

Pendeen / Porthgwarra (Cornwall): SW gales drive Atlantic seabirds inshore.
Berry Head (Devon): south coast equivalent.
Spurn (Yorkshire): east-coast benchmark.
Flamborough Head (Yorkshire): paired with Bempton for full coverage.
Strumble Head (Pembrokeshire): Welsh headland, brilliant in NW gales.

Tick every British seabird

Most seabirds are uncommon-to-epic in the dex (5-25 pts each). Pelagic specialties are legendary tier (100 pts).

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