Visiting Coastal Seabird Colonies: What to Know Before You Go

Why Seabird Colonies Are Worth the Trip

Nothing in birding quite compares to standing near a seabird colony in full breeding season. The noise is overwhelming, a wall of sound from thousands of birds calling, squabbling, and communicating with their mates and chicks. The air is thick with birds wheeling overhead. The smell is, honestly, powerful. And the sheer density of life packed into a small area of cliff face, island, or beach is something you have to experience in person to fully appreciate.

Seabird colonies host species you simply cannot see anywhere else. Atlantic Puffins, Northern Gannets, Razorbills, Common Murres, Black-legged Kittiwakes, and dozens of tern and gull species gather in numbers ranging from hundreds to hundreds of thousands at their breeding sites. Many of these birds spend the rest of the year far out at sea where birders cannot reach them. The colony is your window into their lives.

The Best Seabird Colonies in North America

Atlantic Coast

Machias Seal Island off the coast of Maine is the most accessible Atlantic Puffin colony in the United States. Boat tours from Cutler, Maine, land on the island in small groups, and you can sit in blinds just feet from nesting puffins, Razorbills, and Arctic Terns. The season runs from June through early August, with peak activity in late June and July.

Eastern Egg Rock, also in Maine, is the famous site where Stephen Kress pioneered the Project Puffin restoration program. Boat tours circle the island and you can observe puffins, terns, and other nesting seabirds from the water. Landing is restricted to researchers.

Cape St. Mary's Ecological Reserve in Newfoundland, Canada, offers one of the most spectacular gannet colonies on the continent. A short walk from the parking area brings you to a cliff edge overlooking Bird Rock, where thousands of Northern Gannets nest so close you can almost touch them. It is a breathtaking and easy-to-reach colony.

Pacific Coast

The Farallon Islands off San Francisco host the largest seabird colony south of Alaska, but public access is prohibited. You can take pelagic boat trips that pass near the islands and observe birds from the water. The Channel Islands in Southern California are more accessible, with Anacapa Island offering close-range views of nesting Western Gulls, Brown Pelicans, and Scripps's Murrelets on ranger-led tours.

Protection Island in Washington state is closed to public landing but visible from nearby kayak routes. It hosts the largest nesting colony of Rhinoceros Auklets in the Lower 48, along with Tufted Puffins, Pigeon Guillemots, and Glaucous-winged Gulls.

What to Bring

Binoculars are essential. An 8x42 or 10x42 pair handles the wide range of distances you encounter at colonies, from cliff-top views of birds hundreds of feet below to close encounters at eye level. A spotting scope adds value at colonies where the nesting areas are distant, but it can be cumbersome on boat trips or narrow cliff paths.

A camera with at least a 300mm lens captures the action well at most colonies. On boat-based visits, a faster shutter speed of 1/2000 second or more compensates for the rolling deck. Waterproof clothing is non-negotiable for boat trips and coastal cliff sites where fog and spray are constant companions.

Sunscreen and a hat matter more than you expect. Seabird colonies are often on exposed, treeless islands or cliff tops where the sun and wind are relentless. Bring water and snacks, there are no concession stands on a remote island. Seasickness medication is worth taking preemptively if you are prone to motion sickness, because pelagic boat trips in open ocean swells can be rough.

How to Watch Without Causing Harm

Seabird colonies are ecologically fragile, and human disturbance during nesting can have devastating consequences. A single careless visitor walking through a tern colony can cause mass nest abandonment, exposing eggs and chicks to predators and lethal sun exposure. Gulls and predatory birds actively patrol colony edges, waiting for exactly this kind of disruption.

Stay on marked trails and behind designated barriers at all colony sites. Never approach nesting birds more closely than the posted distance limits allow. If no distance is posted, a minimum of 50 feet from the nearest nest is a reasonable default, though more is always better. If birds are visibly agitated, calling alarm notes, performing distraction displays, or dive-bombing you, you are too close. Back away immediately.

On boat-based colony visits, the captain controls the approach distance. Trust their judgment and resist asking them to get closer. Many seabird colonies have legally mandated buffer zones enforced by wildlife agencies, and boat operators who violate them risk losing their permits.

The Conservation Picture

Seabird populations worldwide are declining faster than almost any other bird group. Overfishing reduces their food supply. Introduced predators like rats and cats devastate island colonies. Plastic pollution kills birds through ingestion and entanglement. Climate change shifts ocean temperatures and disrupts the fish stocks seabirds depend on.

Visiting a seabird colony supports conservation directly. Entrance fees and tour revenues fund habitat protection and predator removal programs. Your presence as a paying visitor demonstrates the economic value of intact seabird habitat to local communities and policymakers. And the experience of witnessing a thriving colony tends to turn casual observers into lifelong advocates for marine conservation.

If the coast is too far for now, track seabird migration and coastal bird movement from home with our Migration Tracker. Knowing when species are moving helps you plan future trips to catch colonies at their peak.