BirdLife Species Factsheet for Brazilian Black-tyrant Brazilian Black-tyrant Knipolegus franciscanus is a dry forest species associated with limestone outcrops at most known locations. It is currently listed as Near Threatened as it was believed to have a declining population which is restricted to ten locations within a moderately small Extent of Occurrence (25,800 km2), thus approaching the thresholds for classification as Vulnerable under criterion B. Recent remapping of the species’s range based on the data presented in Marini et al. (2010) suggests that the EOO is much larger than was previously estimated (606,100 km2 – see attached map, range as previously mapped is in yellow, revised range in red), which means that it no longer approaches the thresholds for classification as Vulnerable under criterion B – if no other criteria are met or nearly met then it would appear sensible to downlist the species to Least Concern. Comments on this proposed status change are welcomed. Reference: Marini, M. A., Barbet-Massin, M., Lopes, L. E. and Jiguet, F. (2010) Predicting the occurrence of rare Brazilian birds with species distribution models. Journal of Ornithology 151(4): 857-866.
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Five most recent topics
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- Okarito Brown Kiwi (Apteryx rowi): Downlist to Vulnerable?
- Northern Brown Kiwi (Apteryx mantelli): downlist to Vulnerable?
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- The Batman of Vietnam March 30, 2017