Wilson's Storm-Petrel illustration
Birdsong field guide

Wilson's Storm-Petrel

Oceanites oceanicus

A small, soot-colored pelagic bird characterized by a prominent white rump and a unique habit of 'walking' on the ocean surface while foraging.

What it sounds like

Generally silent at sea; at nesting colonies, it produces raspy, rhythmic chattering and soft, repetitive 'gr-gr-gr' vocalizations.

Reference call, compare with what you heard
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Rec. Fabrice Schmitt · ChileCC BY-NC-SAXeno-canto

Field notes

  • It is one of the most numerous bird species on Earth, with a population estimated in the tens of millions.
  • The species performs 'pattering,' using its yellow-webbed feet to strike the water surface while hovering to stir up plankton.
  • Despite its small size, it undertakes a massive transequatorial migration from Antarctic breeding grounds to the North Atlantic and Pacific.
  • It possesses a highly developed olfactory sense, allowing it to locate food sources like krill by smelling dimethyl sulfide emissions.
  • The bird is named after Alexander Wilson, the 'Father of American Ornithology,' who first described the species.
Habitat
Pelagic open oceans; nests on rocky crevices and ice-free cliffs of Antarctic and sub-Antarctic islands.
Range
Global maritime distribution, breeding in the Southern Ocean and migrating to all major oceans except the Arctic.

Similar & commonly confused birds

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