Identifying Common Seabirds on a Coastal Walk

There is something quietly thrilling about a coastal walk once you know what you are looking at. The same stretch of shingle or clifftop that seems empty in January can hold half a dozen species in the space of a hundred metres, and the difference between a satisfying walk and a baffling one is usually just a handful of shapes, colours and calls learned and remembered.

This guide is about the birds you will actually meet on a typical British coastline — not the rarities, but the everyday characters that make coastal birdwatching rewarding all year round.

Read the coast before you read the birds

Where you stand matters as much as what you carry. Different parts of the shore hold different birds, and the tide dictates everything.

• Rocky shores and headlands — oystercatchers, turnstones, rock pipits and, in summer, the clamour of cliff-nesting seabirds.
• Estuaries and mudflats — curlews, redshanks, dunlin and shelduck, often in large roosting flocks.
• Sandy beaches and dunes — sanderling chasing the surf, ringed plovers on shingle, terns fishing offshore.
• Open sea — gannets, fulmars and, in winter, divers and grebes sitting low on the water.

Timing your walk around low tide gives you the widest feeding areas and the best chance of waders close in. For cliff colonies, any state of tide works — but a rising tide pushes fish closer to shore, which often brings feeding gannets and terns within binocular range.

Shoreline waders: learn the silhouette

Silhouette is your fastest identification tool. Get the bill shape and leg colour first, then worry about plumage.

The oystercatcher is unmistakable: a plump black-and-white bird with a long orange-red bill and pink legs, piping a loud, insistent kleep-kleep as it clatters over the rocks. It is one of the few waders that will happily feed on mussel beds in full view, hammering shells open with that chisel of a bill.

The curlew is our largest wader, brown and streaked, with a spectacularly long down-curved bill. Its call — a rising, bubbling cur-lee, then a rippling trill — is one of the most atmospheric sounds on a British estuary. Look also for the smaller whimbrel in spring, which gives a neat seven-note whistle rather than a bubbling song.

Smaller birds reward patience. Ringed plovers run in short, fidgety bursts across shingle, stopping abruptly as if switched off; look for the black band around the breast and orange legs. Turnstones are stocky and busy, flipping weed and pebbles with a short, slightly upturned bill, often in noisy little groups. Sanderling, pale and almost sparrow-like, sprint along the tideline like clockwork toys, chasing the retreating wave and fleeing the next.

And do not overlook the redshank, with its bright orange-red legs and restless, teetering manner. It is often the first bird to raise the alarm, yelping tew-tew-tew before everything else on the mudflat lifts into the air.

Gulls, terns and the ones people overlook

Most visitors dismiss gulls as "just seagulls", which is a shame, because four or five species are genuinely easy to separate once you know what to check.

• Herring gull — pink legs, heavy build, grey back. The classic seaside gull, and the one that will steal your chips.
• Lesser black-backed gull — noticeably darker grey-black back, yellow legs, slimmer and more elegant.
• Great black-backed gull — the largest gull in the world, with a very dark back and a brutish bill. It bullies everything else on the beach.
• Common gull — smaller and gentler, round-headed, greenish-yellow legs. Despite the name, it is not especially common.
• Black-headed gull — small, with a chocolate-brown hood in summer (not black) and bright red legs.

Terns are the real prize on a summer walk. Sandwich terns have a black bill with a yellow tip; common terns a red bill with a black tip; Arctic terns a blood-red bill and long tail streamers. Watch them hover, drop, and rise with a silver fish gleaming in the bill.

Cliffs and the open sea

On a summer clifftop, the birds are often below you, which is a gift. Stand well back from the edge, use binoculars, and scan the ledges slowly.

The gannet is the showstopper: a big white bird with black wingtips, a creamy-yellow head and a two-metre wingspan. Watch for its plunge dive — a folded, arrow-straight fall into the water from a great height, followed by a satisfying splash.

Fulmars glide past on stiff, straight wings, looking like miniature albatrosses, and their tube-nosed bill is a giveaway. Kittiwakes are dainty little gulls with black wingtips and yellow bills, constantly calling their name from the cliff face. On the ledges themselves, guillemots stand upright in chocolate-brown rows, while razorbills show a thick black bill with a neat white line. And then there is the puffin — smaller than you expect, whirring past on frantic wings with that absurd, wonderful bill.

Let the calls do half the work

You will hear far more than you see, especially in mist or against a bright sea. Learn five calls well and your identification rate will double:

• Oystercatcher — a shrill, repeated piping, carrying far across the bay.
• Curlew — the bubbling, haunting cur-lee.
• Kittiwake — a rhythmic, three-syllable kitti-wake from the cliffs.
• Gannet — a harsh, grating croak around colonies.
• Redshank — the estuary alarm clock, tew-tew-tew.

A phone app or a pocket guide with sound recordings is time well spent before you go. Even better: sit still on a sea wall for twenty minutes and simply listen.

Kit, timing and coasting kindly

You do not need much. A pair of 8x42 binoculars suits most coastal viewing, with a spotting scope a bonus for distant rafts and cliff ledges. Take a windproof layer, because a headland in June can feel like February, and check a tide table before you set out.

Most importantly, give the birds room. Keep to paths on clifftops, keep dogs on a short lead where birds are nesting or roosting, and never walk into a high-tide roost — the birds need that energy for the next feed, not for flying away from you. Take your litter home, including the bits that are not yours.

Do that, and the coast gives back generously: a turnstone on a winter groyne, a gannet folding into the sea, a curlew calling across an empty estuary at dusk. Learn a few shapes and a few calls, and every coastal walk becomes a conversation.