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 | Near Threatened | C1; D2 |
| 2016 | Near Threatened | C1; D2 |
| 2012 | Near Threatened | C1;D2 |
| 2010 | Near Threatened | C1, D2 |
| 2008 | Near Threatened | C1, D2 |
| 2004 | Near Threatened | |
| 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) | 24,300,000 km2 | medium |
| Number of locations | 7 | - |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 13800 mature individuals | medium | estimated | 2015 |
| Population trend | decreasing | poor | suspected | 1942-2010 |
| Generation length | 19.3 years | - | - | - |
| Number of subpopulations | 1 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: A full island survey during the 2015 breeding season resulted in 6,312 breeding pairs counted on Raso and a further 3,500 birds on Branco (Biosfera unpubl. data). This is equivalent to c.24,000 individuals in total.
Trend justification: The population is suspected to have declined over the past 67.5 years (three generations) owing to uncontrolled levels of harvest, which took place on the main breeding colonies until 2009.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Brazil | extant | native | yes | |||
| Cape Verde | extant | native | yes | |||
| Mauritania | extant | native | ||||
| Morocco | extant | native | ||||
| Senegal | extant | native | yes | yes | ||
| Spain | extant | vagrant | ||||
| Uruguay | extant | native | yes | |||
| USA | extant | vagrant |
| Country/Territory | IBA Name |
|---|---|
| Cape Verde | Bafador-Baca |
| Cape Verde | Braco Cagarra - Piram |
| Cape Verde | Branco Islet Integral Natural Reserve |
| Cape Verde | Coastal cliffs between Porto Mosquito and Baia do Inferno |
| Cape Verde | Cruzinha Natural Park |
| Cape Verde | Ilhéu de Curral Velho - marine |
| Cape Verde | Ilhéu de Curral Velho and adjacent coastal area |
| Cape Verde | Ponta Costa |
| Cape Verde | Rabo de Junco Islet Natural Reserve Reserva |
| Cape Verde | Raso / São Nicolau - marine |
| Cape Verde | Raso Islet Integral Natural Reserve |
| Senegal | Northern Senegal shelf break |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Marine Neritic | Macroalgal/Kelp | major | non-breeding |
| Marine Neritic | Macroalgal/Kelp | major | breeding |
| Marine Neritic | Pelagic | major | non-breeding |
| Marine Neritic | Pelagic | major | breeding |
| Marine Neritic | Seagrass (Submerged) | major | breeding |
| Marine Neritic | Seagrass (Submerged) | major | non-breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | non-breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | major | breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | major | non-breeding |
| Marine Neritic | Subtidal Sandy | major | non-breeding |
| Marine Neritic | Subtidal Sandy | major | breeding |
| Marine Neritic | Subtidal Sandy-Mud | major | non-breeding |
| Marine Neritic | Subtidal Sandy-Mud | major | 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 | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Past, Unlikely to Return | Majority (50-90%) | Slow, Significant Declines | Past Impact | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
Recommended citation
BirdLife International (2024) Species factsheet: Cape Verde Shearwater Calonectris edwardsii. Downloaded from
https://datazone.birdlife.org/species/factsheet/cape-verde-shearwater-calonectris-edwardsii on 22/11/2024.
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 22/11/2024.