Data Zone
Taxonomic note
Calonectris diomedea and C. borealis (del Hoyo and Collar 2014) were previously lumped as C. diomedea following Sibley and Monroe (1990, 1993), which was also formerly lumped with C. edwardsii following Hazevoet (1995), contra Brooke (2004).
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 |
|---|---|---|
| 2018 | Least Concern | |
| 2016 | Least Concern | |
| 2015 | Least Concern | |
| 2014 | Least Concern | |
| 2012 | Not Recognised | |
| 2010 | Not Recognised | |
| 2009 | Not Recognised | |
| 2008 | Not Recognised | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | full migrant | Forest dependency | does not normally occur in forest |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 97,600,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 504000-507000 mature individuals | medium | estimated | 2012 |
| Population trend | unknown | - | suspected | - |
| Generation length | 19.3 years | - | - | - |
Population justification: The European population is estimated at 252,000-253,000 pairs, which equates to 504,000-507,000 mature individuals (BirdLife International 2015).
Trend justification:
The trend of the European breeding population is difficult to quantify owing to gaps in the data. However, the largest population (Azores, with c.75% of the European population) is not thought to be declining appreciably. It is therefore unlikely that the species is declining at a rate approaching >30% over ten years or three generations. A population recovery has been reported for the population on Selvagem Grande (Savage Islands, Madeira archipelago), with an estimated increase of 4.6% per year since 1980 (Granadeiro et al. 2006).
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Algeria | extant | native | yes | |||
| Angola | extant | native | yes | |||
| Antigua and Barbuda | extant | native | yes | |||
| Argentina | extant | native | yes | |||
| Bahamas | extant | native | yes | |||
| Barbados | presence uncertain | uncertain | ||||
| Belgium | presence uncertain | uncertain | ||||
| Benin | extant | native | yes | |||
| Bermuda (to UK) | extant | native | yes | |||
| Brazil | extant | native | yes | |||
| Cameroon | extant | native | yes | |||
| Canada | extant | native | yes | |||
| Cape Verde | extant | native | yes | |||
| Congo | extant | native | yes | |||
| Congo, The Democratic Republic of the | extant | native | yes | |||
| Costa Rica | extant | vagrant | ||||
| Côte d'Ivoire | extant | native | yes | |||
| Cuba | presence uncertain | uncertain | ||||
| Denmark | presence uncertain | uncertain | ||||
| Dominica | presence uncertain | uncertain | ||||
| Equatorial Guinea | extant | native | yes | |||
| Faroe Islands (to Denmark) | presence uncertain | uncertain | ||||
| France | extant | native | yes | |||
| French Guiana | extant | native | yes | |||
| Gabon | extant | native | yes | |||
| Gambia | extant | native | yes | |||
| Germany | presence uncertain | uncertain | ||||
| Ghana | extant | native | yes | |||
| Gibraltar (to UK) | extant | native | yes | |||
| Guadeloupe (to France) | extant | vagrant | ||||
| Guinea | extant | native | yes | |||
| Guinea-Bissau | extant | native | yes | |||
| Ireland | presence uncertain | uncertain | ||||
| Liberia | extant | native | yes | |||
| Madagascar | extant | native | yes | |||
| Martinique (to France) | presence uncertain | uncertain | ||||
| Mauritania | extant | native | yes | |||
| Mexico | extant | native | yes | |||
| Montserrat (to UK) | presence uncertain | uncertain | ||||
| Morocco | extant | native | yes | |||
| Mozambique | extant | native | yes | |||
| Namibia | extant | native | yes | |||
| Netherlands | presence uncertain | uncertain | ||||
| New Zealand | extant | vagrant | ||||
| Nigeria | extant | native | yes | |||
| Norway | presence uncertain | uncertain | ||||
| Oman | presence uncertain | uncertain | ||||
| Panama | extant | vagrant | yes | |||
| Poland | presence uncertain | uncertain | ||||
| Portugal | extant | native | yes | yes | ||
| Puerto Rico (to USA) | presence uncertain | uncertain | ||||
| São Tomé e Príncipe | extant | native | yes | |||
| Senegal | extant | native | yes | |||
| Serbia | presence uncertain | uncertain | ||||
| Sierra Leone | extant | native | yes | |||
| South Africa | extant | native | yes | |||
| Spain | extant | native | yes | yes | ||
| St Helena (to UK) | extant | native | yes | |||
| St Kitts and Nevis | presence uncertain | uncertain | ||||
| St Lucia | presence uncertain | uncertain | ||||
| St Pierre and Miquelon (to France) | extant | native | yes | |||
| St Vincent and the Grenadines | presence uncertain | uncertain | ||||
| Suriname | presence uncertain | uncertain | ||||
| Sweden | presence uncertain | uncertain | ||||
| Switzerland | presence uncertain | uncertain | ||||
| Togo | extant | native | yes | |||
| Trinidad and Tobago | presence uncertain | uncertain | ||||
| Turks and Caicos Islands (to UK) | presence uncertain | uncertain | ||||
| Uruguay | extant | native | yes | |||
| USA | extant | native | yes | |||
| Venezuela | extant | vagrant | ||||
| Western Sahara | extant | native | yes |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Caves and Subterranean Habitats (non-aquatic) | Caves | suitable | breeding |
| Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | breeding |
| Marine Intertidal | Rocky Shoreline | major | breeding |
| Marine Neritic | Macroalgal/Kelp | suitable | non-breeding |
| Marine Neritic | Macroalgal/Kelp | major | breeding |
| Marine Neritic | Pelagic | major | breeding |
| Marine Neritic | Pelagic | major | non-breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | non-breeding |
| Marine Neritic | Seagrass (Submerged) | major | breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | non-breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | non-breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | major | breeding |
| Marine Neritic | Subtidal Sandy | suitable | non-breeding |
| Marine Neritic | Subtidal Sandy | major | breeding |
| Marine Neritic | Subtidal Sandy-Mud | major | breeding |
| Marine Neritic | Subtidal Sandy-Mud | suitable | non-breeding |
| Marine Oceanic | Epipelagic (0-200m) | major | non-breeding |
| Marine Oceanic | Epipelagic (0-200m) | major | breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | major | non-breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | major | breeding |
| Rocky areas (eg. inland cliffs, mountain peaks) | major | breeding | |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
|||||||||
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Mus musculus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus rattus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Teira dugesii | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
| Pollution | Excess energy - Light pollution | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
| Sport hunting/specimen collecting | subsistence, national |
Recommended citation
BirdLife International (2024) Species factsheet: Cory's Shearwater Calonectris borealis. Downloaded from
https://datazone.birdlife.org/species/factsheet/corys-shearwater-calonectris-borealis on 27/12/2024.
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 27/12/2024.