EN
White-winged Duck Asarcornis scutulata



Taxonomy

Taxonomic note
Asarcornis scutulata (del Hoyo and Collar 2014) was previously placed in the genus Cairina.

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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- A2cd+3cd+4cd;C2a(i) A2cd+3cd+4cd;C2a(i);D1

Red List history
Year Category Criteria
2016 Endangered A2cd+3cd+4cd;C2a(i)
2013 Endangered A2cd+3cd+4cd;C2a(i)
2012 Endangered A2cd+3cd+4cd;C2a(i)
2008 Endangered A2c,d; A3c,d; A4c,d; C2a(i)
2006 Endangered
2004 Endangered
2000 Endangered
1996 Endangered
1994 Endangered
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - continent
Land-mass type - shelf island
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,120,000 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor estimated 2007
Population trend Decreasing medium suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 50-79 - - -
Decline (10 years/3 generation past and future) 50-79 - - -
Number of subpopulations 2-100 - - -
Largest subpopulations 1-89 - - -
Generation length (yrs) 7.8 - - -

Population justification: There has not been a comprehensive analysis of recent records, but estimates of c.450 in India (A. Choudhury in litt. 2007), (although it may be lower than this estimate [H. Yahya in litt. 2016]) low hundreds in Myanmar and c.100 in Cambodia (J. C. Eames in litt. 2007) combined with an earlier estimate of 150 in Indonesia suggest that the species's population may precautionarily be considered to lie within the band 250-999 mature individuals. This equates to 375-1,499 individuals in total, rounded here to 350-1,500 individuals.

Trend justification: This species's population is suspected to have decreased very rapidly owing to the widespread loss, degradation and disturbance of lowland riverine habitats. Resultant small and fragmented populations are susceptible to hunting - opportunistic collection of eggs and chicks - and other stochastic events.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Bangladesh N Extant Yes
Bhutan U Extant
Cambodia N Extant Yes
India N Extant Yes
Indonesia N Extant Yes
Laos N Extant Yes
Malaysia N Possibly Extinct Yes
Myanmar N Extant Yes
Thailand N Extant Yes
Vietnam N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Vietnam Ke Go
Vietnam Dak Dam
Vietnam Nam Cat Tien
Bangladesh Pablakhali Wildlife Sanctuary
Indonesia Rawa Tapus
Indonesia Rawa Lunang
Indonesia Bukit Tigapuluh
Indonesia Kerumutan
Indonesia Rawa Pesisir Pantai Barat Tapanuli Selatan (Angkola)
Indonesia Berbak
Indonesia Sembilang
Indonesia Gunung Leuser
Indonesia Trumon - Singkil
Indonesia Way Kambas
Indonesia Bukit Barisan Selatan
Indonesia Ujung Kulon
Myanmar Hukaung Valley
Myanmar Nam Sam Chaung
Myanmar Chatthin
Myanmar Htamanthi
Myanmar Bumphabum
Thailand Nam Nao
Thailand Phu Khieo
Thailand Thung Yai - Naresuan
Indonesia Rawa Tulang Bawang
Laos Xe Khampho / Xe Pian
Cambodia O Skach
Cambodia Chhep
Laos Upper Xe Kaman
Laos Dong Khanthung
Cambodia Upper Srepok Catchment
Cambodia Snoul / Keo Sema / O Reang
Laos Nakai Plateau
Myanmar Tanai River
Vietnam Yok Don
India D'Ering Memorial Wildlife Sanctuary
India Dibang Reserve Forest and adjacent areas
India Itanagar Wildlife Sanctuary
India Kane Wildlife Sanctuary
India Magu Thingbu
India Manabum and Tengapani Reserve Forests
India Mehao Wildlife Sanctuary
India Namdapha - Kamlang
India Namsangmukh - Borduria
India Pakhui or Pakke Wildlife Sanctuary
India Papum Reserve Forest
India Barail Range
India Behali Reserve Forest
India Dhansiri Reserve Forest
India Dibru - Saikhowa Complex
India Dum Duma, Dangori and Kumsong Reserve Forests
India East and North Karbi Anglong Wildlife Sanctuaries
India Garampani, Nambor and Doigrung
India Gibbon (Hollongapar) Sanctuary
India Innerline, Katakal and Barak Reserve Forests
India Jamjing and Sengajan
India Jatinga
India Langting-Mupa Reserve Forest
India Lumding - Marat Longri
India Nameri National Park
India Sonai-Rupai Wildlife Sanctuary
India Subansiri
India Tirap - Burhidihing
India Upper Dihing (East) Complex
India Upper Dihing (West) Complex
India Balpakram Complex
India Saipung
India Jiri - Makru Wildlife Sanctuary
India Zeilad Lake Sanctuary
India Palak Dil
India Intaki National Park
India The Chapories of Lohit Reserve
India Lumding Reserve Forest
Cambodia Mondulkiri - Kratie Lowlands
Laos Xe Pian
Thailand Sai Yok
Laos Xe Khampho
Myanmar Upper Chindwin River: Kaunghein to Padumone Section
India Namtok, Namheik, Nampong and Manmao
India Tirap-Paktai and Namphai
India Marat Longri Wildlife Sanctuary
India Innerline (West) and Katakhal Reserve Forests
India Barail Wildlife Sanctuary
India Kamlang Wildlife Sanctuary and Reserve Forest
India Innerline (East) and Barak Reserve Forests
India Namdapha National Park
India Barail Range forests

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) major resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) major resident
Altitude 0 - 1400 m Occasional altitudinal limits (max) 1705 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
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
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Human intrusions & disturbance Work & other activities Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Species disturbance, Ecosystem degradation
Natural system modifications Dams & water management/use - Dams (size unknown) Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Pollution Domestic & urban waste water - Type Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Species mortality
Residential & commercial development Commercial & industrial areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2020) Species factsheet: Asarcornis scutulata. Downloaded from http://www.birdlife.org on 05/12/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 05/12/2020.