South Stack gets the headlines. Puffins in April, guillemots packed onto ledges, the lighthouse postcard shot. It deserves every visitor it draws. But if you’ve already done the Ellin’s Tower pilgrimage — or you’re the sort of birder who’d rather have a hide to yourself — Anglesey (Ynys Môn) holds half a dozen sites that rival it for species count, if not for Instagram appeal.
This is a guide to the quieter corners. The lagoons where Sandwich terns wheel in their thousands. The mudflats that pull in passage waders like a magnet. The woodland edge where you’ll hear a grasshopper warbler reeling before you ever spot it. Bring your bins, pack a flask, and leave the crowds at the lighthouse.
Cemlyn Bay — the tern colony
The shingle ridge at Cemlyn curves around a brackish lagoon on Anglesey’s northern coast, creating one of Britain’s most important breeding sites for Sandwich terns. From May through July, the colony swells to over 2,000 pairs, their harsh kirrick calls carrying across the water. Arctic terns nest here too, along with common terns and a scattering of black-headed gulls.
The site is managed jointly by the National Trust and the North Wales Wildlife Trust. A circular walk (about 1.5 miles) follows the shingle bank on the seaward side, giving views into the lagoon without disturbing the nesting birds. The western hide — a simple wooden structure — offers the best angles in early morning light. Bring a scope if you have one; the terns fish constantly, plunging into the lagoon and emerging with sand eels.
Practical notes: Park at the small car park at the Cemlyn Bay end of the minor road from Tregele (LL67 0DL). The shingle is loose and uneven — sturdy footwear helps. Dogs are prohibited during the breeding season (April–August). No facilities on site; the nearest café is back in Cemaes.
Malltraeth Cob and the Cefni Estuary
Where the Afon Cefni meets the Malltraeth Sands, a causeway (the Cob) separates the tidal estuary from the Malltraeth Pool inland. This junction of habitats pulls in an exceptional range of species across the year.
In winter, the estuary hosts curlew, redshank, oystercatcher, and grey plover in the hundreds. Wigeon and teal gather on the pool. Little egrets — still a relative novelty in North Wales when the first pair bred in 2002 — are now a daily sight. The Cob itself makes a natural viewing platform; you can scan both the estuary and the pool from the roadside.
Spring and autumn bring passage migrants. Spotted redshank, greenshank, and wood sandpiper turn up on the mudflats. Wheatears line the fence posts. Overhead, hobbies chase dragonflies in September. The pool occasionally pulls in something rarer — a spoonbill in May, a Temminck’s stint in late spring.
Practical notes: The A4080 crosses the Cob; there’s a small layby on the southern side where you can park and scan. For longer walks, the Anglesey Coastal Path runs along the estuary edge north towards Newborough (Niwbwrch). The Joiners Arms in Malltraeth village serves food and keeps binoculars-friendly hours.
RSPB Valley Wetlands
Tucked behind RAF Valley, this reserve rarely makes the tourist guides. That’s a mistake. The RSPB’s Valley Wetlands (Cors Ddyga) comprises shallow pools, reedbeds, and wet grassland that support breeding lapwing, redshank, and — in good years — bittern. The booming call of a male bittern carrying across the reeds in early spring is worth the drive alone.
Three hides overlook the main pool. The southern hide gives the best reed-edge views; the northern hide is better for open water and wildfowl. In winter, expect gadwall, shoveler, teal, and occasional smew. In summer, the air fills with sedge warblers and reed buntings. Cetti’s warbler, once a rarity in Wales, now breeds here — listen for its explosive song bursting from the willow scrub.
Practical notes: The reserve entrance is off the minor road between Valley and Llanfihangel yn Nhowyn — follow signs for the RSPB car park (LL65 3NT). Entry is free for RSPB members; small charge for non-members. The paths are flat and accessible, though some sections flood after heavy rain.
Penmon and the Fedw Fawr Headland
Most visitors come to Penmon for the priory or the views of Puffin Island (Ynys Seiriol). Birders come for the sea passage.
From the headland at Fedw Fawr, you can watch seabirds moving through the Menai Strait and around the island’s eastern tip. In autumn, Manx shearwaters stream south in their thousands. Gannets dive offshore. Skuas harry the terns. On a good day in September, you’ll tick razorbill, guillemot, kittiwake, and — if luck holds — a sooty shearwater or great skua.
Winter brings divers. Red-throated divers are regular; great northern divers turn up most years. Eiders bob in the shallows. The rocky shoreline holds purple sandpiper and turnstone from November onwards.
Practical notes: Drive to the end of the Penmon road (£5 toll for the final stretch to the point; pay at the machine). The headland is exposed — wind funnels through hard even on calm days. A bench by the old pilot station makes a decent seawatch spot. Bring layers.
Newborough Warren and Llyn Rhos-ddu
Newborough Forest and its adjoining dune system are better known for red squirrels and walks to Llanddwyn Island. But the wetland pools scattered through the warren hold their own rewards.
Llyn Rhos-ddu, a small pool on the forest’s eastern edge, pulls in passage waders in spring and autumn — greenshank, green sandpiper, and occasionally something scarcer. Water rail breed in the reedy fringes; listen for their pig-like squeals at dusk. In winter, the pool attracts goldeneye and goosander.
The dunes themselves support skylarks and meadow pipits in summer. Short-eared owls quarter the grassland in winter months, hunting voles at last light. Walk the boardwalk trail from the main car park, then loop south towards the warren — the further you get from the car park, the quieter it gets.
Practical notes: Pay and display parking at Newborough Beach car park (LL61 6SG) — charges apply year-round. The forest paths are well-maintained; the dune paths are sandy and slower going. Bring a head torch if you’re staying for owls.
Timing your visit
Each site has its season. May through July for the Cemlyn terns. August through October for wader passage at Malltraeth. Winter for divers at Penmon and bitterns at Valley. Spring migration (late April to mid-May) rewards the patient at any of these spots.
Early morning is almost always best — fewer walkers, better light, more active birds. An hour before sunset works too, especially for owls and for roosting waders on the estuary.
South Stack will always draw the crowds. It should — it’s spectacular. But Anglesey’s birdwatching runs deeper than one cliffside. Walk the Cob at Malltraeth on a grey November morning, scope trained on the mudflats, and you’ll understand why the serious birders keep coming back.