| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
|
medium |
Estimated |
2005 |
| Population trend |
Decreasing |
medium |
|
- |
| Number of subpopulations |
|
- |
- |
- |
| Largest subpopulation |
|
- |
- |
- |
| Generation length (yrs) |
15.1 |
- |
- |
- |
|
Population justification: The western sub-population (B. p. pavonina) was estimated to number c.15,000 individuals in 2004, and the eastern sub-population (B. p. ceciliae) is less well-known, though estimated at 28,000-55,000 individuals in the same year. |
|
Trend justification: The western sub-population (B. p. pavonina) is estimated to have declined from 15,000-20,000 individuals in 1985 to 15,000 individuals in 2004 (Beilfuss et al. 2007). Although the eastern sub-population may have undergone a more substantial decline (50,000-70,000 individuals in 1985 to 28,000-55,000 individuals in 2004), the accuracy of initial and current counts are questionable hence a trend based on this data is not advisable (Beilfuss et al. 2007; T. Dodman in litt. 2009). Therefore, based on data from B. p. pavonina populations alone, the species is estimated to have declined between 0-25% from 1985-2004. Given the uncertainty around these estimates, we provisionally estimate a worst-case decline of 30-49% over 45 years (three generations), though the true figure may be higher depending on the status of B. p. ceciliae. |
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Artificial/Aquatic & Marine |
Irrigated Land (includes irrigation channels) |
suitable |
resident |
| Artificial/Aquatic & Marine |
Seasonally Flooded Agricultural Land |
suitable |
resident |
| Artificial/Aquatic & Marine |
Water Storage Areas (over 8ha) |
suitable |
resident |
| Artificial/Terrestrial |
Arable Land |
suitable |
resident |
| Grassland |
Subtropical/Tropical Dry |
suitable |
non-breeding |
| Grassland |
Subtropical/Tropical High Altitude |
suitable |
non-breeding |
| Grassland |
Subtropical/Tropical Seasonally Wet/Flooded |
major |
resident |
| Marine Coastal/Supratidal |
Coastal Freshwater Lakes |
suitable |
resident |
| Savanna |
Dry |
suitable |
resident |
| Wetlands (inland) |
Bogs, Marshes, Swamps, Fens, Peatlands |
suitable |
resident |
| Wetlands (inland) |
Permanent Freshwater Lakes (over 8ha) |
suitable |
resident |
| Wetlands (inland) |
Permanent Freshwater Marshes/Pools (under 8ha) |
suitable |
breeding |
| Wetlands (inland) |
Permanent Inland Deltas |
major |
resident |
| Wetlands (inland) |
Permanent Rivers/Streams/Creeks (includes waterfalls) |
suitable |
resident |
| Wetlands (inland) |
Seasonal/Intermittent Freshwater Lakes (over 8ha) |
suitable |
resident |
| Wetlands (inland) |
Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha) |
suitable |
breeding |
|
Altitude
|
0 - 0 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 |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Agriculture & Aquaculture |
Livestock farming & ranching / Small-holder grazing, ranching or farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Energy production & mining |
Oil & gas drilling |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Unknown |
Unknown |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Biological resource use |
Fishing & harvesting aquatic resources / Persecution/control |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Unknown |
Unknown |
Unknown |
| Stresses |
| Species mortality |
|
| Biological resource use |
Hunting & trapping terrestrial animals / Intentional use (species is the target) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Species mortality |
|
| Human intrusions & disturbance |
War, civil unrest & military exercises |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Unknown |
Unknown |
Unknown |
| Stresses |
| Indirect ecosystem effects |
|
| Natural system modifications |
Dams & water management/use / Abstraction of surface water (unknown use) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Natural system modifications |
Dams & water management/use / Dams (size unknown) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Natural system modifications |
Fire & fire suppression / Increase in fire frequency/intensity |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Unknown |
Unknown |
Unknown |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Pollution |
Agricultural & forestry effluents / Herbicides and pesticides |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion, Species mortality |
|
| Pollution |
Industrial & military effluents / Type Unknown/Unrecorded |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
| Climate change & severe weather |
Droughts |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Ecosystem degradation, Ecosystem conversion |
|
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
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