Archived 2010-2011 topics: Sincorá Antwren (Formicivora grantsaui): newly described and Near Threatened?

Sincorá Antwren Formicivora grantsaui was recently described by Gonzaga et al. (2007) from the Serra do Sincorá, on the eastern escarpments of the Chapada Diamantina, Central Bahia, eastern Brazil.

In this range, F. grantsaui has been documented by specimens or voice recordings from several sites between 850 m and 1100 m at four localities, although it occurs more extensively within the area bounded by these records (see attached range map): Morro do Pai Inácio, in the municipality of Palmeiras; the valley of the Rio Ribeirão, in the municipality of Lençóis; Vale do Paty and near Igatu, both in the municipality of Andaraí; and the valley of the Rio Cumbuca and other sites around the town of Mucugê (Gonzaga et al. 2007). It has a small estimated Extent of Occurrence of just 3,300 km2 but it remains relatively poorly known within this range. Given the altitudinal range and habitat of the species it is perhaps unlikely that it faces immediate threats and therefore may best be classified as Near Threatened under criterion B1 of the IUCN Red List, with a small range but not meeting the qualifiers for listing as Endangered (<5,000 km2 AND a severely fragmented and declining population/range). However, if its habitat is considered threatened and declines are thought likely the species would qualify under a higher category of threat. Other restricted-range species of the Cadeia do Espinhço are typically considered Vulnerable or Near Threatened under criterion B1 depending on the threats to their habitats.

Comments on the attached map, recent records and threats to the species’s habitat are welcomed:

Gonzaga, L. P. Carvalhaes, A. M. P. and Buzzetti, D. R. C. (2007) A new species of Formicivora antwren from the Chapada Diamantina, eastern Brazil (Aves: Passeriformes: Thamnophilidae). Zootaxa 1473: 25–44.

Formicivora grantsaui range map

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1 Response to Archived 2010-2011 topics: Sincorá Antwren (Formicivora grantsaui): newly described and Near Threatened?

  1. Ciro Albano says:

    It’s at least Near Threatened; although locally common; the restrict habitat where it occurs is not totally safe as fires can be a serious threat (in 2008 more than 50% of the Chapada Diamantina National Park was burn).

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