Snow PetrelPagodroma niveaWhere and when to see them

The snow petrel is an entirely white Antarctic seabird with black eyes and a small black bill. Closely associated with sea ice, it travels between marine feeding grounds and nests hidden in rocky cavities. Some colonies lie surprisingly far inland, requiring long journeys to reach food. Its clean plumage can make it difficult to follow against snow or bright ice, while its graceful flight is often conspicuous against dark cliffs and water.

Size

30-40 cm long; 75-95 cm wingspan

Weight

240-460 g

Lifespan

Not reliably established

Status

Least Concern

Snow petrels fly with quick wingbeats and buoyant glides, often moving low above ice-strewn water. At breeding colonies, pairs occupy sheltered rock cavities and exchange soft calls. Both parents share incubation of a single egg and later feed the chick. When threatened at a nest, adults or chicks can eject defensive stomach oil, a strong reason to keep well away from occupied crevices. Snow petrels exhibit colonial breeding, often forming small to large colonies in remote and inaccessible locations. During foraging flights, they often skim the water surface, performing graceful, arcing maneuvers. Adults display strong fidelity to their breeding sites, returning to the same nests year after year.

• It is one of the few birds recorded breeding deep inland in Antarctica.
• A pair normally lays a single egg.
• Defensive stomach oil can foul an intruder's plumage.
• Like other petrels, it has tubular nostrils on its bill.

November through March is the main practical Antarctic visitor window and overlaps the breeding period. Birds can be encountered near suitable ice habitat during these months, but route, visibility and changing pack ice strongly influence opportunities for distant observation. Prime viewing opportunities occur during the austral summer when adults are actively breeding, from November to March. Early season expeditions may witness courtship and nest selection, while later trips offer chances to see chicks being fed. Weather conditions and sea ice extent can greatly influence accessibility to their typical habitats.

The species uses Antarctic pack ice, ice edges and nearby cold ocean waters. Nesting takes place in rock cracks, boulder fields and cliffs on coastal sites and inland nunataks. Suitable cavities offer protection from wind, snow accumulation and potential predators. The species shows a high affinity for sea ice, often found far into the pack ice zone. Its preference for ice makes it one of the most southerly breeding birds, with some colonies over 300 kilometers inland. They create nests in sheltered spots within rocky outcrops on remote islands and the Antarctic continent.

Antarctic silverfish, krill and other small marine animals form much of the diet. Birds collect prey around openings and edges in sea ice and may also scavenge. Food availability shifts with ice conditions and access to productive feeding areas. Snow petrels filter surface water for prey using lamellae inside their bills, a method particularly effective for krill. They are opportunistic feeders and have been observed foraging near seals and whales, capitalizing on disturbed prey. Their diet composition can vary geographically and seasonally depending on the abundance of prey species.

Common name

Snow Petrel

Scientific name

Pagodroma nivea

Animal group

Birds

Size

30-40 cm long; 75-95 cm wingspan

Weight

240-460 g

Lifespan

Not reliably established

Status

Least Concern

Identification

Its completely white plumage combined with black eyes and a small black bill separates the snow petrel from other Antarctic petrels and from the stockier, pigeonlike sheathbills. The snow petrel's completely white body plumage, including underwings, distinguishes it from the partially white plumage of other petrel species like the Cape petrel. Its short, black, conical bill and small, dark eyes are key features, providing a stark contrast against its pristine white feathers. Juveniles resemble adults, but may have a faint dusky wash on the head and neck.