Murphy's petrel: where and when to see them

Murphy's petrel is a dark, ocean-ranging gadfly petrel that breeds on remote islands of the subtropical South Pacific. Much of its life unfolds far beyond ordinary coastal viewpoints, and its wide-ranging movements can carry it into the North Pacific. Its understated plumage makes identification challenging against similar petrels. Remote breeding habitat offers some protection from everyday disturbance, but introduced predators can threaten colonies where formerly safe nesting islands become accessible to mammals.

Size

38-41 cm long

Weight

300-450 g

Lifespan

Not reliably established

Status

Least Concern

This petrel travels with the characteristic arcing flight of gadfly petrels, using wind above waves to cover large distances efficiently. It collects food near the sea surface and spends long periods away from land. Breeding birds return to island colonies, where they lay a single egg and share parental duties. Visits to nesting areas are often concentrated in darkness, so daytime coastal presence need not reveal an active colony nearby. Courtship and nesting activities primarily occur at night to avoid predators, with adult birds making regular nocturnal visits to their burrows. After the chick hatches, one parent remains to guard it while the other forages, switching roles periodically.

• The species was formally described in 1949.
• It belongs to Pterodroma, the genus known as the gadfly petrels.
• Nonbreeding birds can travel from South Pacific colonies into the North Pacific.
• Like other petrels, it has tubular nostrils associated with a well-developed sense of smell.

There is no reliable observation season for Polynesia as a whole. Breeding schedules and ocean movements differ among island groups, and relevant colonies are remote. Any travel window should be based on a specific lawful itinerary, weather and current local seabird expertise. For general pelagic birdwatching, the austral summer months (December to February) might offer opportunities for sightings during oceanic transits, particularly in areas with upwellings. However, specific breeding colony visits are highly regulated and only permissible during limited periods, often in the austral winter for some populations.

Its principal habitat is open ocean, with breeding restricted to remote South Pacific islands and atolls. Nests occur on the ground in suitable sheltered sites. Most colonies are inaccessible to ordinary visitors, and routine shore viewing across Polynesia is unlikely. While breeding, birds may be found on high volcanic islands or low-lying coral atolls, often selecting sites with dense vegetation or rock crevices for shelter. Chicks fledge in autumn, after which all birds disperse widely across the Pacific Ocean for their non-breeding phase.

Squid are important prey, alongside fish and crustaceans collected from oceanic waters. Some food may be obtained from organisms available at the surface at night. Detailed feeding information remains limited because birds range widely through remote marine environments. Prey items are typically soft-bodied, such as squid and gelatinous zooplankton, which are often found in surface waters. These petrels employ surface-seizing and shallow-plunge methods to capture food, rather than deep diving.

Common name

Murphy's petrel

Scientific name

Pterodroma ultima

Animal group

Birds

Size

38-41 cm long

Weight

300-450 g

Lifespan

Not reliably established

Status

Least Concern

Identification

It is a largely uniform dark gray-brown petrel with a paler chin and subtle pale underwing areas, but separation from other dark gadfly petrels usually requires expert views. Distinguishing features include a relatively short, stout bill and a dark 'M' pattern across the upperwings when viewed from above, though this can be difficult to discern at sea. The pale chin patch is often inconspicuous unless birds are seen at close range in good light.