Data Zone
Taxonomic note
Sarkidiornis melanotos and S. sylvicola (del Hoyo and Collar 2014) were previously lumped as S. melanotos following Sibley and Monroe (1990, 1993), and prior to that had been split as S. melanotos and S. sylvicola in Collar and Andrew (1988). Original note from Illustrated Checklists: Usually considered conspecific with S. sylvicola (see related note/s). Monotypic.
Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2023. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 8. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v8_Dec23.zip.
| 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 | full migrant | Forest dependency | does not normally occur in forest |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 53,300,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 60000-227000 mature individuals | - | - | 2023 |
| Population trend | decreasing | - | suspected | - |
| Generation length | 8.63 years | - | - | - |
Population justification: The global population size is estimated at 90,000-340,000 individuals (Wetlands International 2023), which equates to 60,000-227,000 mature individuals. The overall population trend is suspected to be decreasing over three generations (25.89 years) (Wetlands International 2023).
Trend justification: .
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Angola | extant | native | yes | |||
| Bangladesh | extant | native | yes | |||
| Benin | extant | native | yes | |||
| Botswana | extant | native | yes | |||
| Burkina Faso | extant | native | yes | |||
| Burundi | extant | native | yes | |||
| Cambodia | extant | native | yes | |||
| Cameroon | extant | native | yes | |||
| Central African Republic | extant | native | yes | |||
| Chad | extant | native | yes | |||
| China (mainland) | extant | native | yes | |||
| Congo | extant | native | yes | |||
| Congo, The Democratic Republic of the | extant | native | yes | |||
| Côte d'Ivoire | extant | native | yes | |||
| Eritrea | extant | native | yes | |||
| Eswatini | extant | native | yes | |||
| Ethiopia | extant | native | yes | |||
| Gabon | extant | native | yes | |||
| Gambia | extant | native | yes | |||
| Ghana | extant | native | yes | |||
| Guinea | extant | native | yes | |||
| Guinea-Bissau | extant | native | yes | |||
| India | extant | native | yes | |||
| Japan | extant | vagrant | ||||
| Kenya | extant | native | yes | |||
| Laos | extant | native | yes | |||
| Lesotho | extant | native | yes | |||
| Liberia | extant | native | yes | |||
| Madagascar | extant | native | yes | |||
| Malawi | extant | native | yes | |||
| Mali | extant | native | yes | |||
| Mauritania | extant | native | yes | |||
| Mozambique | extant | native | yes | |||
| Myanmar | extant | native | yes | |||
| Namibia | extant | native | yes | |||
| Nepal | extant | native | yes | |||
| Niger | extant | native | yes | |||
| Nigeria | extant | native | yes | |||
| Oman | extant | vagrant | ||||
| Pakistan | possibly extinct | native | yes | |||
| Rwanda | extant | native | yes | |||
| São Tomé e Príncipe | extant | vagrant | ||||
| Senegal | extant | native | yes | |||
| Sierra Leone | extant | native | yes | |||
| Somalia | extant | native | yes | |||
| South Africa | extant | native | yes | |||
| South Sudan | extant | native | yes | |||
| Sri Lanka | possibly extinct | native | yes | |||
| Sudan | extant | native | yes | |||
| Tanzania | extant | native | yes | |||
| Thailand | extant | native | yes | |||
| Togo | extant | native | yes | |||
| Uganda | extant | native | yes | |||
| Vietnam | extant | native | yes | |||
| Zambia | extant | native | yes | |||
| Zimbabwe | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Cambodia | Ang Tropeang Thmor |
| India | Bardha Dam |
| India | Kunthur - Kallur Lakes |
| Mali | Séri |
| Mauritania | Gâat Mahmoûdé |
| Niger | Ayorou |
| Senegal | Djoudj wetlands |
| South Sudan | Sudd (Bahr-el-Jebel system) |
| Zambia | Kafue Flats |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Aquatic & Marine | Artificial/Aquatic - Irrigated Land (includes irrigation channels) | suitable | breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Irrigated Land (includes irrigation channels) | suitable | non-breeding |
| Artificial/Terrestrial | Arable Land | suitable | breeding |
| Artificial/Terrestrial | Arable Land | suitable | non-breeding |
| Artificial/Terrestrial | Pastureland | suitable | breeding |
| Artificial/Terrestrial | Pastureland | suitable | non-breeding |
| Grassland | Subtropical/Tropical Seasonally Wet/Flooded | suitable | breeding |
| Grassland | Subtropical/Tropical Seasonally Wet/Flooded | suitable | non-breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | non-breeding |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | breeding |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | non-breeding |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | breeding |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | non-breeding |
| Wetlands (inland) | Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha) | suitable | breeding |
| Wetlands (inland) | Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha) | suitable | non-breeding |
| Altitude | 0 - 3400 m | 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 | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Viral/prion-induced diseases - Avian Influenza Virus (H5N1 subtype) | Timing | Scope | Severity | Impact | ||||
| Future | Minority (<50%) | Rapid Declines | Low Impact: 4 | ||||||
|
|||||||||
| Natural system modifications | Dams & water management/use - Large dams | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
| Pollution | Agricultural & forestry effluents - Herbicides and pesticides | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Knob-billed Duck Sarkidiornis melanotos. Downloaded from
https://datazone.birdlife.org/species/factsheet/knob-billed-duck-sarkidiornis-melanotos on 27/11/2024.
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 27/11/2024.