IUCN Red List Criteria
| Critically Endangered |
A3cd+4cd |
| Endangered |
A3cd+4cd;C2a(i) |
| Vulnerable |
A3cd+4cd;C2a(i);D1 |
IUCN Red List history
| Year |
Category |
| 2012 |
Critically Endangered |
| 2011 |
Critically Endangered |
| 2010 |
Critically Endangered |
| 2009 |
Critically Endangered |
| 2008 |
Critically Endangered |
| 2004 |
Critically Endangered |
| 2000 |
Critically Endangered |
| 1996 |
Endangered |
| 1994 |
Endangered |
| 1988 |
Threatened |
Species attributes
| Migratory status |
not a migrant |
Forest dependency |
High |
| Land mass type |
continent
shelf island
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
88,900 |
medium |
| Number of locations |
6-10 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
650 |
good |
Estimated |
2011 |
| Population trend |
Decreasing |
medium |
|
- |
| Number of subpopulations |
2-100 |
- |
- |
- |
| Largest subpopulation |
51-250 |
- |
- |
- |
| Generation length (yrs) |
7 |
- |
- |
- |
|
Population justification: The Indonesian population was estimated at 30-100 individuals but has apparently declined. Nationwide coordinated surveys for the species in Cambodia recorded a total of 644individuals in September 2011 (Sum P. and H. Wright in litt. 2012). Based on these survey data, a minimum population of 650 mature individuals seems appropriate, equivalent to at least 970 individuals in total. |
|
Trend justification: The species declined precipitously during the 20th century having been relatively common in the early part of that period. Until very recently its global status has been poorly monitored and there is insufficient evidence to estimate a rate of decline. Widespread habitat conversion is now underway or projected across most of the species's range, which is likely to result in extremely rapid declines in the next 10-20 years. Two of three known sites where the highest numbers have been recorded are currently not under any formal legal protection and are therefore particularly vulnerable to being targeted for conversion. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Cambodia |
Native |
No |
Yes |
|
|
| China (mainland) |
Native |
possibly |
|
|
|
| Indonesia |
Native |
No |
Yes |
|
|
| Laos |
Native |
No |
Yes |
|
|
| Myanmar |
Native |
possibly |
|
|
|
| Thailand |
Native |
Yes |
|
|
|
| Vietnam |
Native |
Yes |
|
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Cambodia |
Ang Tropeang Thmor |
 |
| Cambodia |
Lomphat |
|
| Cambodia |
Mekong River from Kratie to Laos |
|
| Cambodia |
Stung Sen / Santuk / Baray |
|
| Cambodia |
Upper Srepok Catchment |
|
| Cambodia |
Upper Stung Sen Catchment |
|
| Cambodia |
Veal Srongae |
|
| Cambodia |
Western Siem Pang |
|
| Indonesia |
Lahan Basah Mahakam Tengah |
|
| Indonesia |
Lembah Sungai Negara |
|
| Indonesia |
Ulu Barito |
|
| Laos |
Xe Pian |
|
| Vietnam |
Kien Luong |
|
| Vietnam |
Nam Cat Tien |
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Artificial/Terrestrial |
Arable Land |
suitable |
non-breeding |
| Forest |
Subtropical/Tropical Moist Lowland |
major |
resident |
| Grassland |
Subtropical/Tropical Seasonally Wet/Flooded |
major |
resident |
| Wetlands (inland) |
Permanent Freshwater Lakes (over 8ha) |
major |
resident |
| Wetlands (inland) |
Permanent Freshwater Marshes/Pools (under 8ha) |
major |
resident |
| Wetlands (inland) |
Permanent Rivers/Streams/Creeks (includes waterfalls) |
major |
resident |
|
Altitude
|
0 - 0 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Residential & commercial development |
Housing & urban areas |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Rapid Declines |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Agriculture & Aquaculture |
Annual & perennial non-timber crops / Agro-industry farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Rapid Declines |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Agriculture & Aquaculture |
Annual & perennial non-timber crops / Small-holder farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Rapid Declines |
Medium Impact: |
| 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 Decline |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Biological resource use |
Fishing & harvesting aquatic resources / Unintentional effects: (subsistence/small scale) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Rapid Declines |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Biological resource use |
Gathering terrestrial plants / Unintentional effects (species is not the target) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
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 |
Majority (50-90%) |
Very Rapid Declines |
High Impact: 8 |
| Stresses |
|---|
| Species mortality |
|
| Human intrusions & disturbance |
Work & other activities |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Whole (>90%) |
Rapid Declines |
High Impact: 8 |
| Stresses |
|---|
| Species disturbance |
|
| Natural system modifications |
Fire & fire suppression / Trend Unknown/Unrecorded |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Causing/Could cause fluct |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Climate change & severe weather |
Droughts |
Timing |
Scope |
Severity |
Impact |
| Future |
Unknown |
Unknown |
Unknown |
| Stresses |
|---|
| Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion |
|
Utilisation
| Purpose |
Primary form used |
Life stage used |
Source |
Scale |
Level |
Timing |
| Food (human) |
Whole |
Adults and juveniles |
Wild |
Subsistence, National |
Non-trivial |
Recent |
| Pets |
Whole |
Adults and juveniles |
Wild |
International |
Non-trivial |
Recent |
Recommended citation
BirdLife International (2013) Species factsheet: Pseudibis davisoni. Downloaded from
http://www.birdlife.org on 22/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 22/05/2013.
This information is based upon, and updates, the information published in BirdLife International (2000)
Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004)
Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
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