Amaurospiza moesta 

Scope: Global

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Cardinalidae

Scientific Name: Amaurospiza moesta
Species Authority: (Hartlaub, 1853)
Common Name(s):
English Blackish-blue Seedeater
Taxonomic Source(s): SACC. 2006. A classification of the bird species of South America. Available at: #
Taxonomic Notes: Recent mitochondrial genetic data show that the genus Amaurospiza is not a member of the Emberizidae and instead indicate strong support for placement in the Cardinalidae (AOU 2009, SACC 2008).

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Symes, A. & Butchart, S.
Contributor(s): Mazar Barnett, J. & Straube, F.
Facilitator/Compiler(s): Butchart, S., Gilroy, J., Sharpe, C J
This species is listed as Near Threatened as it is suspected to be declining moderately rapidly throughout its range as a result of habitat loss and degradation.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Amaurospiza moesta occurs in south-east Brazil (south Espírito Santo, south-east Minas Gerais, east São Paulo, Paraná, Santa Catarina, north Rio Grande do Sul, and Tocantins, with one historical record from south Maranhão), east Paraguay (Canindeyú, Caazapá, Itapúa and Alto Paraná) and north-east Argentina (Misiones) (Storer 1989, Ridgely and Tudor 1989, Brooks et al. 1993, Sick 1993, Lowen et al. 1996, Pacheco et al. 2007). In Brazil, it is relatively common in the Serra do Mar and Paraná (F. C. Straube in litt. 1991), but very local elsewhere (Ridgely and Tudor 1989). In Argentina, it is locally common, especially in the highlands (Benstead et al. 1993, J. Mazar Barnett in litt. 1999), but it is rare in Paraguay, even at the few sites where it has been recorded (Storer 1989, Brooks et al. 1993, Lowen et al. 1996, Madroño and Esquivel 1997).

Countries occurrence:
Argentina; Brazil; Paraguay
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:605000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):1600
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The global population size has not been quantified, but this species is described as 'rare and patchily distributed' (Stotz et al. 1996).

Trend Justification:  Although data on trends are lacking, slow to moderate population declines are suspected owing to continuing habitat loss and degradation within parts of the range.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:UnknownContinuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No
No. of individuals in largest subpopulation:100

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits lowland and montane Atlantic forest up to 1,600 m. It is particularly found where there is extensive Chusquea or Guadua spp. bamboo stands (Ridgely and Tudor 1989, Lowen et al. 1996, Parker et al. 1996) but is possibly less dependent on bamboo flowerings than Temminck's Seedeater Sporophila falcirostris (F. C. Straube in litt. 1991, Lowen et al. 1996).

Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):3.8
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): There are still extensive tracts of montane forest, particularly in São Paulo, but lowland Atlantic forest has been severely degraded and is now threatened by urbanisation, industrialisation, agricultural expansion, colonisation and associated road-building (Dinerstein et al. 1995).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
Conservation Actions Proposed
Monitor populations at known sites to determine population trends and rates of range contraction. Conduct ecological studies to determine precise habitat requirements and levels of tolerance of habitat degradation and fragmentation. Grant protection to areas of suitable habitat.

Citation: BirdLife International. 2012. Amaurospiza moesta. The IUCN Red List of Threatened Species 2012: e.T22723559A38136499. . Downloaded on 26 October 2016.
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