Data Zone
Justification of Red List category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size is estimated at 25,001-110,000 individuals (Wetlands International 2023), which equates to 16,700-73,300 mature individuals. This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 13.3% within its mapped range over the past three generations (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). The overall population trend is considered to be decreasing over three generations (16.35 years) (Wetlands International 2023).
Trend justification
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Pteronetta hartlaubii has a widespread distribution in Mali, Guinea, Sierra Leone, Liberia, Côte d'Ivoire, Ghana, Nigeria, Sudan, Cameroon, Central African Republic, Equatorial Guinea, Gabon, Congo, Democratic Republic of Congo, Uganda and Angola.
The species is found in forested areas, in particular in secluded marshes and pools within dense, swampy, lowland tropical evergreen forest and gallery forest. It is also found along small rivers and streams in well-wooded savanna areas, and is recorded from salt pans in Congo and Cameroon (F. Dowsett-Lemaire and R. Dowsett in litt. 2005). It requires areas of open water such as large rivers or lakes on which to moult (Madge and Burn 1988). The species is sedentary throughout its range and only local movements have been recorded (Scott and Rose 1996). It is likely to breed between August and November, although this is not certain as no nest has ever been found in the wild (Scott and Rose 1996). The species is normally encountered dispersed in pairs or small groups during both the breeding and non-breeding seasons, but it is known to aggregate into larger flocks (> 30 birds) on open water whilst undergoing moult (Madge and Burn 1988). The species generally feeds nocturnally (Kear 2005b), its diet consisting of aquatic invertebrates (insects, arachnids, crustaceans and molluscs), seeds and roots (F. Dowsett-Lemaire in litt.1999, del Hoyo et al. 1992). No nest has ever been found in the wild, however observations from captive populations suggest that nest sites are most likely to be in tree holes and hollow trees or occasionally on the ground amongst dense cover (Madge and Burn 1988, Kear 2005b).
The primary threat to this species is habitat loss due to forest destruction (Scott and Rose 1996). Other threats include hunting, increases in slash-and-burn cultivation, water pollution from mining and poison-fishing, and hydrological changes owing to logging (Holbech 1992, Holbech 1996, W. R .J. Dean in litt. 1999). However, in Cameroon and Nigeria, it appears to survive even in very disturbed areas (P. Hall in litt. 1999, M. Languy in litt. 2000, H. Rainey in litt. 2003) and the Central Africa populations are not considered to be threatened (F. Dowsett-Lemaire and R. Dowsett in litt. 2005). The species is hunted and traded at traditional medicine markets in Nigeria (Nikolaus 2001).
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Hartlaub's Duck Pteronetta hartlaubii. Downloaded from
https://datazone.birdlife.org/species/factsheet/hartlaubs-duck-pteronetta-hartlaubii on 22/11/2024.
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 22/11/2024.