French: Huîtrier noir German: Klippenausternfischer Spanish: Ostrero negro americano
Straits of Magellan
Subspecies and Distribution
H. a. bachmani
Audubon, 1838 – W Aleutian Is (Kiska I) through S Alaska (including Round I), W Canada and W USA to NW Mexico (Los Coronados Is and Baja California). Outside breeding season, mostly concentrated between S British Columbia and Baja California.
H. a. ater
Vieillot, 1825 – N Peru (Lambayeque) S through Chile to Tierra del Fuego and N up Atlantic coast to SC Argentina (Chubut); Falkland Is. Outside breeding season some move N to extreme N Peru, NE Argentina and probably Uruguay.
43–45·5 cm; 585–850 g (nominate), male 555–648 g, female 618–750 g (race bachmani); wingspan c. 80 cm. Heavily built, all-dark... read more
Most-frequently heard call a repeated over-slurred piping whistle, “peep” or “kleep”. During... read more
Breeds on pebble and shell beaches. Outside breeding season occurs on shingle and rocky shores, as... read more
Food and feeding
Very few data for South American nominate, which is known only to feed mainly on mussels and limpets on rocky shores. Diet of race ... read more
In nominate race, laying mostly starts in Nov, in Tierra del Fuego; late Oct to late Jan, on Falkland Is; May–Jun in N America (race... read more
Mainly sedentary. Birds breeding in extreme S (Tierra del Fuego) move an unknown distance N after... read more
Status and conservation
Not globally threatened (Least Concern). Occurs at fairly low density throughout range and is considered a species of high conservation concern in both USA and Canada, but... read more
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