Archived 2011-2012 topics: Restinga Antwren (Formicivora littoralis): downlist to Endangered?

Initial deadline for comments: 31 January 2012 [note that this has been moved back by about two months].

BirdLife species factsheet for Restinga Antwren

Restinga Antwren Formicivora littoralis is endemic to a tiny area of Rio de Janeiro state, Brazil, where it inhabits coastal scrub, including restinga vegetation. It is currently listed as Critically Endangered on the basis that it was thought to have an extremely small range, with an Area of Occupancy (AOO) estimated at only 9 km2, in which its habitat is severely fragmented, with on-going declines taking place in its Extent of Occurrence (EOO), AOO, area, extent and/or quality of habitat and number of mature individuals.

Surveys conducted in 2005-2007 have, however, located the species over a wider area and this has led to revisions in its range size (Mattos et al. 2009). On the basis of the new survey results, the species’s AOO is estimated at 148 km2 by Mattos et al. (2009), suggesting that it should be downlisted to Endangered under criterion B2.

Remapping of the species’s range by BirdLife, with reference to the data provided by Mattos et al. (2009), has resulted in a new EOO estimate of c.280 km2. It is thus proposed that the species be downlisted to Endangered under criteria B1a+b(ii,iii); B2a+b(ii,iii), on the basis that it is still considered to have a very small and severely fragmented range, and declines are on-going in the AOO and area, extent and/or quality of habitat, at least.

Updated BirdLife range map for Restinga Antwren (click on map to see larger version)


Mattos, J. C. F., Vale, M. M., Vecchi, M. B. and Alves, M. A. S. (2009) Abundance, distribution and conservation of the Restinga Antwren Formicivora littoralis. Bird Conserv. Int. 19: 392-400.

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2 Responses to Archived 2011-2012 topics: Restinga Antwren (Formicivora littoralis): downlist to Endangered?

  1. Joe Taylor says:

    The following comments were sent by Maria Alice dos Santo Alves on 30 November 2011:

    About the text it looks all right, as it follows our paper Mattos et al. 2009. However, the map needs changes. For example in the west part of the range the species is actually restricted only to approximatelly few hundred meters from the beach line. Even in the map of Mattos et al. it is a bit over this distance. In the map you presented, the area was much over. Please follow the map of our article as much as possible. In Saquarama (SAQ) municipality the species does not occur surrouding the laggons.
    For the occurence, please expand the line from Araruama Laggon to Tucuns (Armação dos Búzios municipality), according to the map of Mattos et al. 2009, even knowing that lacuns can occur in the range.
    Thank you very much for the opportunity to make comments for this species.

  2. Nothing to add to Dr. Alves’ comments and the text is precise. All data suggest wit confidence that this species should be downlisted to Endangered.

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