Unofficial RoostWiki···
Rookery
Black Oystercatcher, a uncommon bird in Roost
  • Black Oystercatcher, profile

    Profile

  • Black Oystercatcher, in flight

    In flight

Cranes & Waders

Black Oystercatcher

Haematopus bachmani

  • uncommon
  • 40 km/h
  • Least Concern

Pacific Coast specialist that pries limpets off wave-pounded rocks. Looks like a goth in a high-vis vest.

Population
~8,900–11,000 individuals rangewide (Partners in Flight independently estimates ~10,000 breeding birds, corroborating this order of magnitude)
Habitat
Rocky intertidal shorelines — sea islets, jetties, breakwaters, and gravel/cobble beaches free of tall vegetation — where it forages on mussel- and barnacle-covered rocks exposed at low tide
Fun fact
Because it feeds almost exclusively on rocky-shore shellfish, the Black Oystercatcher is treated by biologists (Partners in Flight rates it 15/20 on the Continental Concern Score) as a keystone indicator species for the health of the Pacific intertidal ecosystem.
Range
Pacific coast of North America, from the Aleutian Islands and southern Alaska south through British Columbia, Washington, Oregon, and California to Baja California, Mexico; largely year-round resident with only short-distance post-breeding movement
Diet
Marine intertidal invertebrates — chiefly mussels and limpets, also chitons, barnacles, crabs, sea urchins, isopods, and marine worms — pried or hammered open with its strong, laterally flattened bill
Size
0.46 m
Wingspan
0.81 m
Lifespan
6 years

More Cranes & Waders

The next 12 of the 100 in the collection, after this one.