Seabirds of the Southern Ocean: Albatrosses, Petrels and the Wind

For most travellers, the seabirds appear before Antarctica does. Somewhere in the Beagle Channel or the first open miles of the Drake Passage, great wings appear off the stern — a wandering albatross banking low across the swells, effortlessly turning without a single wingbeat. From that moment until the ship returns to Ushuaia, the sky above the Southern Ocean is never empty. It is one of the richest seabird theatres on Earth.

The reason is the same as for the whales and the penguins: the Southern Ocean produces extraordinary quantities of food, and seabirds have evolved over millions of years to harvest it efficiently. Understanding the basic cast — albatrosses, petrels, prions, skuas, shearwaters and the rest — takes less effort than it might seem, and it turns the otherwise bewildering black-and-white blur of distant birds into identifiable individuals with distinct lives, strategies and stories.

The albatrosses: mastering wind over water

Eleven species of albatross breed in the Southern Ocean region, from the enormous wandering albatross to the smaller, more numerous black-browed. The wandering albatross is the one most travellers picture: slate-grey and white in adults, with a wingspan that commonly exceeds three metres — the largest of any living bird. It soars by dynamic soaring, a technique of exploiting the speed gradient between fast air high above the waves and slower air at the surface, banking and climbing and banking again without expending energy in powered flight. A wandering albatross can cover 10,000 kilometres in a single foraging trip.

The black-browed albatross is the species most commonly seen following ships across the Drake and around the peninsula. Named for a dark smudge above the eye that gives it a permanently stern expression, it is an agile, fast bird, often seen in groups wheeling behind the vessel in its wake. Where the wanderer is solitary and regal, the black-browed is sociable and competitive. Both are extraordinary, and both are regularly threatened by longline fishing, which is the single largest driver of albatross mortality globally.

Giant petrels: the Southern Ocean's undertakers

The southern giant petrel and northern giant petrel — collectively called 'nellies' by those who know them — are the largest petrels and among the most ecologically important scavengers of the Southern Ocean. At the colonies of South Georgia and the Antarctic Peninsula, they feed on penguin chicks, carrion, offal and anything else available. Their heads and necks, often stained dark with blood, make them aesthetically less appealing than an albatross, but their ecological role as the region's primary scavengers makes them indispensable.

Giant petrels are also powerful predators at sea, taking other seabirds and squid. They are identifiable by size — close to an albatross in wingspan — and a heavy, tubenose bill with a distinctive pale nostril tube. The southern species has two colour morphs: the typical dark-brown bird and a rare white morph that from a distance can be confused with a small albatross. Both species are commonly seen around expedition ships.

Prions, petrels and the rest: the small birds of the ocean

Below the albatrosses and giant petrels, the Drake Passage and Southern Ocean host a fleet of smaller tubenoses — storm petrels, diving petrels, cape petrels and prions — that collectively represent millions of individual birds. The cape petrel, or pintado, is one of the most immediately recognisable: a boldly chequered black-and-white bird that joins ships reliably in the Drake and follows in lively flocks. Its name comes from the Portuguese for 'painted'.

Prions, small and fast and blue-grey, are harder to identify — several similar species flock together — but the sight of thousands of them banking in unison over a heaving swell is one of the Southern Ocean's most characteristic spectacles. Wilson's storm petrel, perhaps the most abundant bird on Earth by some counts, is a tiny, swallow-sized bird with a white rump that flutters low over the surface, dipping its feet as it feeds — appearing fragile for an ocean it inhabits year-round.

Skuas and sheathbills: the land-going opportunists

Two species of skua attend penguin colonies and ship landings in the Antarctic region: the brown skua and the south polar skua. Both are large, aggressive, buff-brown birds, capable of harassing other seabirds into dropping their food and boldly walking through penguin colonies snatching unguarded eggs or chicks. They are the ecosystem's aerial enforcers — essential for keeping colonies healthy by removing the weak and the dead, even if their methods are difficult to watch.

The sheathbill, white and dove-like, is the only land bird native to Antarctica and entirely non-aquatic — it cannot swim or dive. Sheathbills scavenge aggressively around colonies and Zodiac landing sites, and their brazen approach to anything edible makes them a constant presence during shore visits. They are often overlooked in favour of the more glamorous penguins and seals, but their ecological niche is unique, and they are found nowhere else in the world.

How to watch: binoculars, position and patience

A pair of binoculars is the single most valuable tool for seabird watching on an expedition ship. Many of the best sightings happen at distance — a white-chinned petrel rising from a trough, a light-mantled albatross ghosting past the bow — and the naked eye will lose them before they are identified. A 7x or 8x magnification is sufficient; higher powers are hard to stabilise on a moving ship.

Position matters. The stern, downwind of the ship's wake, is where most birds concentrate; the bow is better for birds disturbed ahead of the vessel. Early morning and evening can be particularly active. Ship naturalists on good expedition voyages run deck watches, point out species and help travellers build a working list — by the time you reach the peninsula, a dedicated observer on a Drake crossing might log twenty species or more. The diversity is the surprise; the volume is the memory.