Heteronetta atricapilla


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Heteronetta atricapilla
Species Authority: (Merrem, 1841)
Common Name(s):
English Black-headed Duck

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ekstrom, J., Butchart, S., Harding, M.
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <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 trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Geographic Range [top]

Range Description: This species breeds in central Chile (Santiago to Valdivia), western Paraguay (Boquerón and Presidente Hayes) and northern Argentina (south to Buenos Aires) (del Hoyo et al. 1992, Madge and Burn 1988, Hayes 1995). It is partially migratory with southern populations moving north to Bolivia, south Brazil and Uruguay in the austral winter; northern breeding populations are largely sedentary (del Hoyo et al. 1992, Madge and Burn 1988).
Argentina; Bolivia, Plurinational States of; Brazil; Chile; Paraguay; Uruguay
Falkland Islands (Malvinas)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: (Kear 2005)
Population Trend: Stable

Habitat and Ecology [top]

Systems: Terrestrial; Freshwater

Citation: BirdLife International 2012. Heteronetta atricapilla. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 03 September 2015.
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