Data Zone
Taxonomic note
Haematopus ater (del Hoyo and Collar 2014) was previously split as H. ater and H. bachmani following Sibley and Monroe (1990, 1993).
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2024 | Least Concern | |
| 2016 | Least Concern | |
| 2014 | Least Concern | |
| 2012 | Not Recognised | |
| 2008 | Not Recognised | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | not a migrant | Forest dependency | does not normally occur in forest |
| Land-mass type | Average mass | 555 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 48,500,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 49,500,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 21300-89300 mature individuals | poor | estimated | 2023 |
| Population trend | unknown | - | - | - |
| Generation length | 15.7 years | - | - | - |
Population justification: The global population size is estimated at 32,000-134,000 individuals (Wetlands International 2023), which equates to 21,300-89,300 mature individuals. The overall population trend is unknown (Wetlands International 2023).
Trend justification: .
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Argentina | extant | native | yes | |||
| Canada | extant | native | yes | |||
| Falkland Islands (Malvinas) | extant | native | yes | |||
| Mexico | extant | native | yes | |||
| Peru | extant | native | yes | |||
| Uruguay | extant | vagrant | ||||
| USA | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Canada | Cleland Island and Southeast Clayoquot Sound |
| Canada | Kyuquot Channel Islets |
| Canada | Moore and Byers Islands and Banks |
| USA | Chiniak Bay |
| USA | Kigul Islets Colonies |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Marine Intertidal | Mud Flats and Salt Flats | suitable | non-breeding |
| Marine Intertidal | Rocky Shoreline | major | resident |
| Marine Intertidal | Shingle and/or Pebble Shoreline and/or Beaches | suitable | resident |
| Marine Intertidal | Tidepools | major | resident |
| Altitude | 0 - 150 m | Occasional altitudinal limits |
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Blackish Oystercatcher Haematopus ater. Downloaded from
https://datazone.birdlife.org/species/factsheet/blackish-oystercatcher-haematopus-ater on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 22/12/2024.