Data Zone
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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | A2bcd |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Vulnerable | A2bcd |
| 2012 | Vulnerable | A2bcd+3bcd+4bcd |
| 2008 | Vulnerable | A2b,c,d; A3b,c,d; A4b,c,d |
| 2006 | Vulnerable | |
| 2004 | Vulnerable | |
| 2000 | Vulnerable | |
| 1994 | Lower Risk/Near Threatened | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | low |
| Land-mass type |
shelf island |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 887,000 km2 | medium |
| Number of locations | 11-100 | - |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 3300-6700 mature individuals | medium | estimated | 2005 |
| Population trend | decreasing | good | suspected | - |
| Rate of change over the past 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
| Generation length | 6.6 years | - | - | - |
| Number of subpopulations | 2-100 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: A total of 4,632 individuals were counted in the Asian Waterbird Census in 2004, and 4,428 in 2005 (D. Li in litt. 2005). The total population is likely to fall between 5,000-10,000 individuals, roughly equating to 3,300-6,700 mature individuals.
Trend justification: A steep population decline was evident by the mid-1970s, with high numbers recorded at only a few sites in the following decade. Subsequent local extinctions and near-disappearances have occurred in several significant sites, owing to exceptionally high levels of hunting and trapping, conversion of natural wetlands, mangrove destruction and the recent extensive use of pesticides on rice-fields. This species's population is suspected to be undergoing a rapid and continuing decline in line with these impacts.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Japan | extant | vagrant | yes | |||
| Philippines | extant | native | yes | |||
| Taiwan, China | extant | vagrant | yes |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | resident |
| Marine Coastal/Supratidal | Coastal Brackish/Saline Lagoons/Marine Lakes | suitable | resident |
| Marine Neritic | Macroalgal/Kelp | suitable | resident |
| Marine Neritic | Seagrass (Submerged) | suitable | resident |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | resident |
| Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | resident |
| Marine Neritic | Subtidal Sandy | suitable | resident |
| Marine Neritic | Subtidal Sandy-Mud | suitable | resident |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | resident |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | resident |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | resident |
| Altitude | 0 - 400 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Agriculture & aquaculture | Marine & freshwater aquaculture - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Rapid Declines | Medium Impact: 7 | ||||||
|
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| Pollution | Agricultural & forestry effluents - Herbicides and pesticides | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Philippine Duck Anas luzonica. Downloaded from
https://datazone.birdlife.org/species/factsheet/philippine-duck-anas-luzonica 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.