Macronectes halli
The Northern Giant Petrel, Macronectes halli, is a formidable and iconic seabird of the Southern Ocean, often dubbed the 'vulture of the sea' due to its scavenging habits. This large tubenose measures 80-95 cm in length with an impressive wingspan of 185-205 cm, distinguishing it as one of the largest petrels globally. Its plumage is generally dark grayish-brown, with a noticeably paler, often whitish, head and neck that contrasts with its darker body, a key field mark for identification. The...
This species is primarily pelagic, spending most of its life over the open ocean. It breeds colonially or solitarily on subantarctic islands at sea level.
The diet is highly opportunistic, consisting mainly of carrion (marine mammals, seabirds), fish discards from fishing vessels, krill, and cephalopods. They also actively predate on penguins, small petrels, and other injured or vulnerable seabirds by surface-seizing or shallow plunging.
Northern Giant Petrels are diurnal and highly opportunistic, spending their days foraging across vast stretches of ocean or congregating around food sources. Their foraging strategy combines scavenging on carrion, such as seal and whale carcasses, with active predation on penguins, other seabirds...
The Northern Giant Petrel has a circumpolar distribution in the Southern Ocean, extending north into subtropical waters during its non-breeding phase. Breeding occurs on numerous subantarctic islands between 46° and 55° S. Key breeding sites include South Georgia, Crozet, Kerguelen, Macquarie, Au...
Least Concern
- Northern Giant Petrels are one of only two species in the genus Macronectes, often referred to as the 'vultures of the sea' for their scavenging habits. - They possess a unique tubular nostril structure atop their bill, characteristic of all Procellariiformes, which helps them excrete excess sa...