Archived 2012-2013 topics: São Francisco Sparrow (Arremon franciscanus): downlist to Least Concern?

This discussion was first published  as part of the 2010 Red List update, but remains open for comment to enable reassessment in 2013. São Francisco Sparrow Arremon franciscanus has a patchy distribution over a wide area of central Bahia and north Minas Gerais, Brazil. It seems to be uncommon to locally fairly common in suitable habitat. It is listed as Near Threatened on the IUCN Red List because it was thought to have a restricted range that approaches the threshold for listing as Vulnerable (<20,000 km2) combined with severely fragmented habitat or occurrence at approximately ten or fewer locations and a continuing decline in its habitat, population size or number of locations/sub-populations. However, this species has been mapped by Natureserve/BirdLife International as having an estimated Extent of Occurrence (EOO) of 56,100 km2, hence it does not appear to approach the IUCN thresholds and appears to warrant downlisting to Least Concern. However, if the species has experienced declines over the past three generations (11 years, BirdLife International unpubl. data) approaching 30% it may warrant listing as Near Threatened under the A criterion (population declines). Given its relatively large range size it seems unlikely that this species will have a population approaching 10,000 mature individuals so it would not qualify as threatened or Near Threatened on population size under the C criterion. Comments on the population trends of this species and its proposed downlisting are welcomed. (This discussion was started as part of the 2010 Red List update)

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  2. Archived 2012-2013 topics: Scaled Ground-cuckoo (Neomorphus squamiger): downlist to Least Concern?
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  4. Archived 2012-2013 topics: Black-throated Babbler (Stachyris nigricollis) and Fluffy-backed Tit-babbler (Macronous ptilosus): downlist both to Least Concern?
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One Response to Archived 2012-2013 topics: São Francisco Sparrow (Arremon franciscanus): downlist to Least Concern?

  1. Fábio Olmos says:

    This species is restricted to the more forest-like formations of the Caatinga (including the “mata seca” of N Minas Gerais and S Bahia, officially considered as part of the Atlantic forest by the Brazilian government…), which are patchy and difficult to map. These are still experiencing huge losses in Minas Gerais ´(over 10,000 ha gone between 2005-2008 according to the mapping carried by SOS Mata Atlantica. By the way, a good tool to estimate actual extent of habitat). Recent records of the species can be found at http://www.wikiaves.com.br/tico-tico-do-sao-francisco (click on the map).

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