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Description |
Geographic Range [top]
Range Description: Anas gibberifrons occurs in Indonesia and East Timor, where it is known from SE Borneo (Kalimantan), S Sumatra, Java, Bali, Lombok, Sumbawa, Sumba, Flores, Lembata, Roti and Sulawesi (including Togian Is, Salayar, Muna, Buton and Sula Is), Timor and Wetar; perhaps also on Ambon, Kai and Tanimbar (Carboneras et al. 2013).
Countries occurrence:
Native:
Indonesia; Timor-Leste
Continuing decline in area of occupancy (AOO): Unknown
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 788000
Continuing decline in extent of occurrence (EOO): Unknown
Extreme fluctuations in extent of occurrence (EOO): No
Continuing decline in number of locations: Unknown
Extreme fluctuations in the number of locations: No
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: The population was estimated at 10,000-100,000 individuals in Wetlands International (2014).
Trend Justification: There are no trend data, but the population is suspected to be undergoing moderately rapid declines as a result of to hunting pressure and habitat degradation.
Current Population Trend: Stable
Additional data:
?Number of mature individuals: 6700-67000 ?Continuing decline of mature individuals: Unknown
?Extreme fluctuations: No ?Population severely fragmented: No
?Continuing decline in subpopulations: Unknown
?Extreme fluctuations in subpopulations: No ?All individuals in one subpopulation: No
Habitat and Ecology [top]
Habitat and Ecology: Uses a variety of wetlands and also found on rivers, with large concentrations sometimes recorded in mangrove swamps; has also been observed on sea (Carboneras et al. 2013).
Systems: Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat: Unknown
Generation Length (years): 6.6
Movement patterns: Not a Migrant
Congregatory: Congregatory (and dispersive)
Threats [top]
Major Threat(s): Hunting and the conversion and degradation of river and mangrove habitat are presumably the primary threats.
Conservation Actions [top]
Conservation Actions: Conservation and research actions underway
No targeted actions are known.
Conservation and research actions proposed
Conduct further surveys to clarify its distribution and status. Instigate regular monitoring of selected key populations. Conduct long-term ecological studies to establish management requirements. Afford protected status to key sites. Promote strict enforcement of hunting regulations and minimise encroachment, disturbance and habitat degradation in all protected areas supporting populations.
Citation: BirdLife International. 2014. Anas gibberifrons. The IUCN Red List of Threatened Species 2014: e.T22727271A40813459. http://dx.doi.org/10.2305/IUCN.UK.2014-2.RLTS.T22727271A40813459.en. Downloaded on 15 January 2016.
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