Heteronetta atricapilla is a chordate, or more specifically a bird, in the Anatidae family.

Heteronetta atricapilla is commonly known (its common name) as the Black-Headed Duck in English.

Heteronetta atricapilla is classified as least concern by the IUCN Red List of Threatened Species, the world's most comprehensive inventory of the global conservation status of plant and animal species maintained by the International Union for Conservation of Nature and Natural Resources.

Species Authority: The species authority, or the name(s) of scientist(s) or person(s) who first described Heteronetta atricapilla is (Merrem, 1841) (IUCN Red List).

Summary: [an error occurred while processing this directive] (Wikipedia).

Country Distribution: Heteronetta atricapilla is found in the following countries:

Argentina, Bolivia, Brazil, Chile, Falkland Islands (Malvinas) [vag], Paraguay, Uruguay (IUCN Red List).

Biome(s)/Ecosystem(s): IUCN lists the following as biomes for Heteronetta atricapilla: Terrestrial; Freshwater (IUCN Red List).

Major Habitat(s): 5.4 Wetland - Bogs, Marshes, Swamps, Fens, Peatlands
5.5 Wetland - Permanent Freshwater Lakes (over 8ha) (IUCN Red List).

Range: Heteronetta atricapilla breeds in central Chile (Santiago to Valdivia), western Paraguay (Boquern 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). This species has a large range, with an estimated global Extent of Occurrence of 2,000,000 km. The global population size has not been quantified, but the species is not believed to approach the thresholds for the population size criterion of the IUCN Red List (i.e. less than 10,000 mature individuals in conjunction with appropriate decline rates and subpopulation qualifiers), even though the species is described as 'uncommon' in at least parts of its range (Stotz et al. 1996). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e. declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern. (IUCN Red List).

CONSERVATION STATUS

Red List Category & Criteria: Heteronetta atricapilla is listed as LC ver 3.1 (2001) (IUCN Red List).

Year Assessed: Heteronetta atricapilla's status was assessed in 2004 (IUCN Red List).

Assessor: Heteronetta atricapilla's Red List status was evaluated by BirdLife International (IUCN Red List).

Red List Evaluator: The Red List Evaluator for Heteronetta atricapilla is listed by IUCN as Ekstrom, J. & Butchart, S. (BirdLife International Red List Authority) (IUCN Red List).

Red List Rational / Justification : Heteronetta atricapilla is listed by IUCN for the following: Heteronetta atricapilla breeds in central Chile (Santiago to Valdivia), western Paraguay (Boquern 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). This species has a large range, with an estimated global extent of occurrence of 2,000,000 km. The global population size has not been quantified, but the species is not believed to approach the thresholds for the population size criterion of the IUCN Red List (i.e., less than 10,000 mature individuals in conjunction with appropriate decline rates and subpopulation qualifiers), even though the species is described as 'uncommon' in at least parts of its range (Stotz et al. 1996). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern. (IUCN Red List).

Red List History: Heteronetta atricapilla was listed on the IUCN Red List of Threatened Species in 1988 (IUCN Red List).

Data Sources for IUCN data: The following is a list of citations from the IUCN web site for Heteronetta atricapilla:

Baillie, J. and Groombridge, B. (compilers and editors) 1996. 1996 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland.

Bird Reference Citations. The numbers inserted in the text accounts above (usually in bold) refer to references. For further details on these references, click on the BirdLife International link above to go to the specific species account on the BirdLife web site. In some cases, particularly in the taxonomic notes, the references are cited using the author names. Details for these can be found on the BirdLife International web site at the following two places:
For References from A–L.
For References from M–Z.

BirdLife International. 2000. Threatened Birds of the World. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, U.K.

BirdLife International. 2004 Threatened Birds of the World 2004. CD-ROM. BirdLife International, Cambridge, U.K.

Collar, N.J., Crosby, M.J. and Stattersfield, A.J. 1994. Birds to Watch 2. The World List of Threatened Birds BirdLife International. Page Bros (Norwich) Ltd, U.K.

(IUCN Red List).

Links: IUCN Red List Profile for Heteronetta atricapilla (IUCN Red List).

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