Black Oystercatcher illustration
Birdsong field guide

Black Oystercatcher

Haematopus bachmani

A large, soot-black shorebird distinguished by its long, bright red bill and piercing yellow eyes, specialized for life on rocky Pacific coasts.

What it sounds like

A series of loud, piercing, high-pitched whistles such as 'klee-up' or a rapid, staccato 'pip-pip-pip'.

Reference call, compare with what you heard
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Rec. Barry Edmonston · CanadaCC BY-NC-SAXeno-canto

Field notes

  • Their laterally compressed bill acts as a specialized chisel for prying limpets and mussels from rocks.
  • Despite their common name, they rarely consume oysters, preferring a diet of mussels, limpets, and chitons.
  • They are considered a keystone indicator species for the ecological health of the rocky intertidal zone.
  • Chicks are semi-precocial and are taught specific foraging and shell-opening techniques by their parents for several months.
  • They are largely non-migratory shorebirds that often maintain the same coastal territories year-round.
Habitat
Rocky intertidal shorelines, wave-swept beaches, and coastal islands.
Range
Pacific coast of North America, ranging from the Aleutian Islands to Baja California.

Similar & commonly confused birds

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