Meet the pigeon guillemot: the black-and-white auk with scarlet feet that nests in shoreline crevices and hunts sculpins through kelp beds.
The pigeon guillemot (Cepphus columba) is the kelp coast's most charming auk: a compact black seabird with a wing patch of purest white, brilliant scarlet feet, and a thin, piping whistle that carries across quiet coves. Where its relatives the murres and puffins commute far offshore to feed, the pigeon guillemot stays home — foraging in nearshore water, frequently inside and around kelp beds, and nesting in the crevices of shoreline cliffs and talus, sometimes within metres of a walking path. It is, for anyone watching wildlife from a kayak or a headland between Alaska and California, the seabird most likely to be your intimate companion for an hour.
| Scientific name | Cepphus columba |
| Common names | Pigeon guillemot; "sea pigeon" in older coastal usage |
| Range | North Pacific coasts and islands, from Alaska and the Aleutians south to central California |
| Habitat | Inshore waters, kelp beds and rocky shoreline; nests in cliff crevices, talus and burrows |
| Size | Around 30–35 cm long with a wingspan near 55–60 cm; half a kilogram or less |
| Lifespan | Long — well over a decade is common for auks of this build |
| Diet | Bottom and nearshore fishes: sculpins, blennies, gunnels, sand lance — plus crustaceans |
| Reproduction | Two eggs per clutch, laid in a hidden crevice; both parents provision the chicks |
In breeding plumage the pigeon guillemot is unmistakable once you know the pattern: satin-black body, a bold white oval wing patch broken by dark lines, bright coral-red legs, and — when it calls — a startling scarlet-red mouth lining to match. In winter the bird pales to mottled grey-white, a winter ghost of itself that fools beginning birders into reporting strange grebes.
Two confusions are routine. Black guillemots are the Atlantic and Arctic relative — nearly identical in pattern but rarely overlapping south of Alaska. And common murres, which share kelp-coast water, are bigger, longer-billed and utterly different in gesture: murres raft in dense grey crowds far from shore, guillemots dabble in twos and threes along the rocks. Behaviour is the field mark: when in doubt, look for the bird that stays near the kelp.
Flight style helps too. Guillemots beat rapidly and low, whirring over the water on small wings — auks have traded aerial efficiency for underwater wings, and every flight looks like hard work with a purpose.
Most Pacific alcids are open-water birds: assess them at sea, you must visit their breeding colonies to see them at all. The pigeon guillemot reverses the pattern. Its whole life runs along the shoreline — foraging within a short swim of the coastline, resting on water beneath cliffs, nesting inside the cliffs themselves. That makes it, ecologically, the auk of the kelp forest edge: the species whose feeding ground, loafing water and nesting ground can all lie inside the same small cove.
Kelp beds suit it for several reasons. The understory and the rock-and-sand margins of kelp reefs hold the small bottom fish — tidepool and saddleback-type sculpins, blennies, gunnels, juvenile greenling — that the guillemot picks from the substrate with quick, agile dives. Kelp-structure water is often calmer and clearer than the open coast, improving both swimming economy and vision. And kelp beds abut the kind of complex, crevice-rich rocky shoreline it needs for nesting, compressing its whole annual geography into one habitat mosaic.
Divers can vouch for the effect: pigeon guillemots are one of the few birds you can encounter underwater, flying over the reef among the kelp on wings and stroking feet, hunting the bottom like a russet-flippered sculpin of the air.
The pigeon guillemot nests where the coast offers cavities: cracks and slots in cliff faces, spaces among boulder talus, empty burrows, and — in the modern economy of the shoreline — culverts, pipes and harbour infrastructure, anywhere dark and predator-resistant within waddling distance of the sea. Nests are often remarkably close together and close to people; along quiet west-coast waterfronts, birds slip in and out of sea walls all summer with impunity.
The two-egg clutch is itself a signature: most auks lay one large egg on a narrow ledge. Two eggs is affordable only if the nest is safe from rolling, and the crevice nest provides exactly that. Both parents incubate, and both feed the chicks, commuting home with crossways-held fish in the bill — the classic auk postcard. Chicks fledge by jumping from the crevice to the sea at night, a lemming-scale leap like all auks commit to, then swim offshore under parental escort to learn the shore from the water side.
For all its cliff-nesting austerity, the pigeon guillemot is gregarious. Birds gather in small "water dances" in the waters below colonies — chasing, splashing, trilling — and are loud with it: that high, reeling whistle is among the signature sounds of a calm morning on the Olympic coast, at Puget Sound or in a Haida Gwaii cove. If you paddle a kayak quietly along a rocky shore in June and hear whistling around you, you are already among guillemots.
The pigeon guillemot's inshore loyalty, which makes it so wonderful to watch, also makes it an early-warning bird. It depends on small, nearshore fish communities and clean coastal water, and it nests where shoreline development, oil spills and introduced predators — especially rats and raccoons on islands — bite hardest. Population counts across parts of the Salish Sea and the outer coast have prompted close monitoring of several local populations. Its shoreline-cavity nesting habit makes it a practical beneficiary of coastal stewardship: predator-free islands, protected coves and working harbours tolerate it just fine if the crevices remain and the rats don't.
Along almost any rocky Pacific coast from Alaska to central California in the breeding season: cliff bases, quiet coves, harbour breakwaters, kelp-lined shorelines. Kayaks and waterfront promenades are excellent platforms; your best odds are calm mornings from May through August within sight of nesting cliffs.
A breeding pigeon guillemot is much smaller and blacker, with a bold white wing patch and bright red legs; a common murre is bigger, dark-brown-and-white, longer-billed and typically far offshore in dense rafts. In winter the guillemot pales to mottled white-grey — look for the wing patch and the small, low-to-the-water whirring flight.
Mostly small bottom and nearshore fish: sculpins, gunnels, blennies, sand lance in season, plus crustaceans. They dive to the substrate and pick prey off rock and sand — feeding right at the interface where kelp-bed edges meet open bottom.
Often. Any dark, predator-safe cavity within commuting distance of the sea is candidate real estate: crevice, culvert, wall slot. Coastal towns and ports frequently host guillemot nests in seawalls, and the birds manage fine around boat traffic so long as nest sites stay rat-free and undisturbed.
It varies by region — some outer-coast populations hold well, while parts of the Salish Sea have drawn close monitoring attention. The consistent pressures are nearshore prey fluctuations, oil and water-quality impacts, and introduced predators on nesting islands. Protected rocky shoreline with clean water is exactly the habitat they need.
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