Identifying common seabirds along British sea cliffs

Why British sea cliffs are a seabird city

Britain’s coastline packs extraordinary life into its vertical edges. Between March and August, cliffs from Shetland to Cornwall become noisy cities of feathers and guano. The air smells of salt and fish; the sound is a constant racket of calls and squabbles. For a coastal walker, learning a few field marks turns that blur of wings into a story of individual species, each with its own habits and preferred ledge.

You do not need expensive kit. A pair of 8x42 binoculars, a waterproof jacket and a tide table will do. Walk slowly, stop often, and scan the cliff face in horizontal bands: grassy top, bare rock, narrow ledges, and the water below. Early morning is often best, before the sun moves round and the updraughts change.

Field marks: the cliff-face specialists

Two species define the British cliff experience. Learn them and you will quickly read the rest of the colony.

• Kittiwake: A small, gentle-looking gull with black legs, a yellow bill and pure black wingtips. Listen for its onomatopoeic call — a repeated kitti-wake — which gives the bird its name. Kittiwakes nest on the narrowest ledges, often in dense clusters, and are the first to panic if a predator passes.
• Fulmar: Stocky, grey-and-white, with a stiff-winged glide that looks more like a small albatross than a gull. The giveaway is the tube-shaped nostrils on top of the bill. Fulmars nest on wider ledges and grassy slopes, and defend their patch by spitting foul-smelling oil. Keep your distance unless you want a jacket you will never forget.

Auks: guillemots, razorbills and puffins

The auks are the cliff’s comedians and tightrope walkers. They stand upright on ledges, shuffle in crowds, and dive like little torpedoes. In flight, their whirring wings look almost too small for their bodies.

• Guillemot: Chocolate-brown above and white below, with a thin, pointed bill. Guillemots pack onto open ledges, often shoulder to shoulder, and their pear-shaped eggs roll in a tight circle rather than off the edge.
• Razorbill: Similar size and shape to a guillemot, but blacker, with a thicker, blunt bill crossed by a white line. Razorbills prefer crevices and smaller ledges, and their call is a low, purring growl.
• Puffin: Unmistakable in summer with its rainbow-coloured bill, orange legs and sad clown’s eye. Smaller than the other auks, puffins nest in burrows on grassy clifftops or in rocky crevices. They arrive in April, raise a single chick — a puffling — and leave by early August.

Shags, cormorants and the larger gulls

Below the auks, on lower ledges and rocky stacks, you will find darker, sleeker birds. They often stand with wings held out to dry, looking prehistoric against the spray.

• Shag: Smaller and more elegant than a cormorant, with a bottle-green gloss, a jaunty crest in spring, and a yellow patch at the base of the bill.
• Cormorant: Bigger, heavier, and more bronze-brown. In breeding plumage it shows a white thigh patch. It nests on cliffs but is equally at home on inland lakes.
• Gannet: A flying cross of white and black, with a creamy-yellow head and a dagger bill. Gannets plunge-dive at speed and nest in dense colonies on offshore stacks.
• Great black-backed gull: The largest gull in the world, with a very dark back, pink legs and a heavy bill. It will take eggs and chicks from other nesting birds.

Best seasons for cliff watching

The seabird year has a clear rhythm. Plan your visit around the species you most want to see.

• February to March: Fulmars return to ledges and begin courtship. Guillemots and razorbills arrive to claim sites. The cliffs are still quiet compared with summer.
• April to June: Peak season. Puffins are ashore, kittiwakes are building nests, and every ledge is occupied. Best for photography, but also the most sensitive period for disturbance.
• July to August: Chicks fledge. Guillemot and razorbill chicks jump from ledges at night, guided by their fathers. Puffins leave early; kittiwakes linger into August.
• September to January: Most auks head out to sea. Cliffs belong to shags, cormorants and larger gulls. Winter storms bring divers and sea ducks to sheltered bays, but breeding colonies are empty.

Respectful viewing distances and cliff safety

Seabirds are resilient, but they have limits. Disturbance costs energy, and in cold, wet weather it can kill. The golden rule is simple: if a bird changes its behaviour because of you, you are too close.

• Stay on marked paths. Cliff edges are unstable, and erosion is a real danger. Never approach the edge for a better view.
• Keep 50 metres from nesting ledges where possible, and use binoculars or a zoom lens to fill the frame. For puffins on a clifftop path, 10–15 metres is often enough, but let the birds come to you.
• Keep dogs on a short lead near colonies. A single dog can flush an entire cliff of birds.
• Do not fly drones near seabird colonies. The noise and movement cause panic, and it is illegal to disturb protected species.
• If birds start calling, circling or diving at you, back away slowly and quietly. You have entered their safety zone.

Take your litter home, including food scraps, which attract gulls and rats. With a little care, these noisy, busy cliffs will keep thriving for the next generation of walkers.