Birdsong field guide
Southern Giant-Petrel
Macronectes giganteus
The Southern Giant-Petrel is a massive, opportunistic seabird often called the 'vulture of the sea' due to its predatory and scavenging nature. It is the largest member of the petrel family, characterized by its robust build and powerful, tube-nosed bill.
What it sounds like
Harsh, guttural croaks and wheezes on the ground, and low-frequency rattles or braying sounds during social displays.
Reference call, compare with what you heard
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Field notes
- Distinguished from the similar Northern Giant-Petrel by its pale green bill tip rather than a reddish one.
- Exhibits two distinct color phases: a dark morph and a rarer white morph that is almost entirely white with scattered black spots.
- Possesses an exceptional sense of smell for a bird, used to locate carrion and nesting colonies across vast oceanic distances.
- It is the only petrel capable of walking effectively on land, which it uses to stalk and hunt prey at penguin and seal colonies.
- Has a specialized 'tube-nose' (naricorn) that allows it to excrete excess salt and track wind-borne scents.
Habitat
Pelagic waters, ice floes, and rocky coastal breeding sites on sub-Antarctic islands.
Range
Circumpolar across the Southern Ocean, ranging from the Antarctic continent to the subtropical waters of South America, Africa, and Australia.
Similar & commonly confused birds
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