Polynesian storm petrelNesofregetta fuliginosaWhere and when to see them

The Polynesian storm petrel is a relatively large, long-legged storm petrel of the tropical Pacific. Despite its name, its scattered range extends beyond Polynesia, with historical records from Fiji among other island groups. It spends most of its life at sea and comes ashore mainly to breed on remote islands. Introduced predators and the vulnerability of small nesting populations make it a serious conservation concern rather than a routine coastal sighting.

Size

25–28 cm body length

Weight

Not reliably established

Lifespan

Not reliably established

Status

Endangered

At sea, this storm petrel flies low over the surface, using buoyant wingbeats and its long legs while picking up food. Birds may patter with their feet as they feed. Nesting takes place in sheltered ground cavities or crevices on remote islands, with adults generally returning under darkness. Their inconspicuous nocturnal attendance makes colonies difficult to confirm, and apparent absence from a casual daytime visit says little about breeding occupancy. Courtship displays and pair bonding likely occur at sea before birds return to their breeding islands. Once at the colony, adults are highly secretive, minimizing their above-ground activity to avoid diurnal predators. Chicks are fed regurgitated stomach oil, a high-energy food source, until they fledge and disperse to sea.

• It is the only living species in the genus Nesofregetta.
• Its broad feet contribute to a distinctive surface-pattering feeding style.
• Plumage varies, including darker individuals that are especially challenging to identify.
• Like other storm petrels, it lays a single egg per nesting attempt.

A reliable Fiji shore-observation season is not established. Regional dry-season travel conditions do not demonstrate that this scarce oceanic bird will be within view of land. Planning should rely on recent verified records and specialist advice, not a presumed tropical breeding calendar. While specific breeding seasons can vary by island, most breeding activity tends to occur during the austral summer months. However, the exact timing can be asynchronous across the vast range, and birds may be present in Fiji waters year-round outside of any breeding cycle. Optimal viewing from research vessels or dedicated pelagic trips would require targeting specific oceanic foraging grounds rather than coastal areas.

The species is primarily pelagic, using warm Pacific waters and remote islands for breeding. Nesting sites require sheltered cavities and protection from introduced predators. Accessible Fiji shorelines are not established routine viewing locations, and historical island records need contemporary verification. This species ranges across the tropical and subtropical Pacific, with a significant portion of its breeding distribution within the French Polynesian archipelago. They show a preference for small, often volcanic, uninhabited islands with dense vegetation cover or rocky terrain. The pelagic zone they frequent extends far offshore, making sightings near larger landmasses or shipping lanes uncommon.

Small fish, squid and marine crustaceans are taken at or near the sea surface. Like other storm petrels, it exploits scattered oceanic food patches rather than feeding on land. Detailed diet information is limited and may vary between breeding areas and seasons. Prey items are typically snatched from the surface or just below, often involving a 'pattering' or 'walking on water' feeding technique. They are opportunistic feeders, taking advantage of upwellings or other oceanographic features that concentrate food. The diet likely includes myctophids (lanternfish) and small squid, which often rise closer to the surface at night.

Common name

Polynesian storm petrel

Scientific name

Nesofregetta fuliginosa

Animal group

Birds

Size

25–28 cm body length

Weight

Not reliably established

Lifespan

Not reliably established

Status

Endangered

Identification

Its unusually long legs, broad feet, large size and pale underparts in typical birds help separate it from smaller dark storm petrels, although plumage variation complicates identification. The relatively large size for a storm petrel, along with its often pale belly and underwing coverts, are key distinguishing features. Look for its distinctive buoyant flight, often described as 'butterfly like,' which contrasts with the more direct flight of other petrel species. Its long legs often trail behind the tail in flight, a useful characteristic to observe with good optics.