Dusky Sound has no permanent human residents. It does, however, have a great many permanent animal ones — and unlike most places in the world where wildlife and people coexist, the wildlife here has not learned to be afraid. The seals look at you with mild curiosity. The oystercatchers carry on regardless. The cormorants simply ignore you. This is what a coastline looks like when it has never been hunted from the sea, and it is extraordinary.

We took the tender out on several occasions specifically to observe and photograph — circling Seal Island, drifting alongside the bird colonies, watching the interactions between species that share these rocky outcrops with remarkable equanimity. What follows is our account of each.

The New Zealand fur seal is the most commonly encountered marine mammal in Fiordland, and Dusky Sound hosts a substantial population across its many rocky outcrops and islets. Their history in these waters is inseparable from the history of European exploration — and exploitation — in the South Pacific.

Captain James Cook was the first European to enter Dusky Sound, anchoring here for seven weeks in 1773 during his second voyage aboard HMS Resolution. Cook's journals describe fur seals hauled out on every rock in vast numbers. Within two decades, that observation had become a commercial blueprint: the first sealing gangs arrived in the 1790s and the slaughter that followed was systematic and staggering. British, American, and Australian vessels worked the New Zealand coast throughout the early 1800s, and it is estimated that over 3 million fur seals were killed nationally in under 50 years. In Fiordland alone, populations that had numbered in the tens of thousands were essentially wiped out. By the 1830s, the industry had collapsed simply because there were no seals left to kill.

Protection came in 1894 under the Animals Protection Act — one of the earliest wildlife protection laws in New Zealand's history. Recovery was extraordinarily slow. The animals had been gone from many of their traditional haul-out sites for two to three generations, and recolonisation required animals to rediscover and establish new colonies from scratch. Dusky Sound, so remote that it was rarely visited even after protection, likely served as one of the refugia from which recovery radiated outward. Today New Zealand fur seals number well over 100,000 animals, and Fiordland remains one of their strongholds. What we are seeing on these rocks is not just wildlife — it is a slow-motion comeback that has taken over a century.

Unlike true seals, fur seals have external ear flaps and can rotate their hind flippers forward to walk on land — which they do with surprising agility on even steep, wet rock. Their thick double-layered fur (the dense underfur that made them so valuable to sealers) traps air and provides exceptional insulation in the cold Fiordland water. On land, they thermoregulate by raising a flipper to catch the breeze — the aquatic equivalent of a dog panting in the sun.

Pups are born between November and January, which means by February many of the young animals we encountered were only weeks or months old — still gaining confidence in the water, still shadowing their mothers along the rock edges. The bulls by contrast are self-possessed to the point of arrogance. One large male on the main seal rock barely registered our presence from five metres, rising onto his foreflippers, taking a long look, and then settling back into exactly the position he'd been in before. The look said everything: this is my rock, and you are a brief inconvenience.

The variable oystercatcher is found only in New Zealand, and "variable" refers to its plumage rather than its temperament — individuals range from entirely black to pied (black and white), with every combination in between. What doesn't vary is the vivid orange-red bill and the red eye-ring, which make the bird immediately recognisable at distance even when it's tucked against the rocks.

Māori knew the tōrea well. Its distinctive piping call — one of the more piercing sounds on any New Zealand coastline — made it both a marker of coastal habitats and a subject of proverb. The species was never hunted to serious depletion, but mainland populations have suffered in the modern era from introduced predators such as stoats, rats, and ferrets, which prey heavily on eggs and chicks. In Fiordland, where the predator burden is lower and human disturbance essentially nil, the birds behave with a confidence that is now unusual on the New Zealand mainland. A population of roughly 5,000 birds exists nationally, and it is slowly recovering as predator control programmes extend further along the coast.

Their bill is a precision tool for a specific job: prising open shellfish. The laterally compressed tip is designed to be inserted into a partially open mussel or oyster and twisted, cutting the adductor muscle before the animal can close. It is fast, efficient, and clearly very satisfying — oystercatchers are among the most purposeful-looking birds we encountered, every movement deliberate and unhurried. They share rocks with the fur seals with no apparent mutual concern, each species occupying its own niche with the easy indifference of animals that have no natural predators worth worrying about.

The spotted shag is another New Zealand endemic and one of the most visually striking birds in Fiordland. In breeding plumage they develop a double crest and a dramatic blue-green eye-ring, and even outside of breeding season the spotted flanks and yellow feet make them worth a second look. They nest colonially on cliff faces and rocky outcrops — exactly the sort of real estate that Dusky Sound provides in abundance.

Shags and cormorants have an unusually long fossil record in New Zealand. Several extinct species are known from subfossil deposits, some of them flightless — a trajectory that New Zealand's isolated, predator-free environment encouraged across many bird lineages before the arrival of Polynesian settlers around 1280 AD and European settlers five centuries later. The spotted shag itself was not heavily exploited, but its cliff-nesting colonial habits made it vulnerable to disturbance, and mainland breeding colonies have declined significantly with coastal development. In Fiordland, nesting on inaccessible rock faces above deep water, they remain largely as Cook and his crew would have found them — numerous, loud, and thoroughly indifferent to visiting vessels.

Cook's naturalist on the second voyage, Johann Reinhold Forster, was the first European to formally describe many of Fiordland's bird species, collecting specimens in Dusky Sound in 1773. The spotted shag was among them. The scientific name Phalacrocorax punctatus — "bald crow, spotted" — dates from that period, and the type specimens Forster collected are still held in European museum collections today.

Unlike most seabirds, cormorants and shags do not have fully waterproof feathers. This is not a design flaw — it is intentional. Waterlogged feathers reduce buoyancy and allow the birds to dive and pursue fish at depth far more efficiently than a bird with a dry, air-trapped plumage could manage. The trade-off is that they must dry their wings after every dive, which is why you always see shags standing on rocks with wings extended — not basking, but actively drying. It is an ancient and peculiar-looking habit that is easy to mistake for posturing. It is in fact simply engineering.

The red-billed gull — the tarāpunga — is a small, quick-eyed bird that seems to be everywhere at once. They are opportunists of the highest order, alert to any activity that might yield a meal: a dive from the tender, a fishing line over the side, any disturbance to the water surface that might bring something edible to the top.

Tarāpunga feature in Māori oral tradition as markers of the coast and harbingers of fish schools — their behaviour when feeding over baitfish schooled near the surface was well understood by Māori fishermen as a reliable indicator of where to cast a line. The bird's Māori name varies slightly by region, with akiaki used in some areas and tarāpunga more widely across the South Island. In Fiordland, where Māori maintained seasonal mahinga kai (food-gathering) sites, the gulls would have been a constant presence around any fishing or shellfish gathering activity — much as they remain today.

In Fiordland they are abundant and seemingly untroubled by the population declines that have affected mainland colonies, where introduced predators, habitat loss, and the collapse of inshore fish stocks have taken a steady toll. The national population has fallen by an estimated 50% since the 1960s on the mainland. Here, far from urban coastlines and fishing pressure, the birds behave as they always have — bold, noisy, and thoroughly opportunistic. The one that hitched a ride on the tender's bow before departing with what it clearly considered appropriate dignity illustrated all of those qualities at once.

What Dusky Sound holds, collectively, is a picture of what coastal Fiordland has always been: abundant, layered, entirely indifferent to human schedules. The seals haul out on the same rocks as the shags. The oystercatchers pick their way among them. The gulls wheel overhead on the lookout for an opportunity. None of it requires our presence, and none of it was altered by it. We were observers here, which felt exactly right.