Santa Marta Warbler (Myiothlypis basilica): Revise global status?

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1 Response to Santa Marta Warbler (Myiothlypis basilica): Revise global status?

  1. Neither population density nor population trends have been estimated for this species. There is no information that may suggest that density estimates for this species are comparable to other congeners such as M. nigrocristata or M. luteoviridis. However, this species is rather rare and hence it is presumed to occur at lower densities than other Myiothlypis.

    A recent evaluation of the risk of extinction of Santa Marta Warbler suggest that remaining habitat would cover 462 km2 (Renjifo et al. 2016), and therefore, the AOO that appears in Annex 1 is at best, an overestimation. The AOO of this species is probably below 500 km2, and it has not yet been reported to occur in more than 1o localities (Córdoba-Córdoba 2016, Renjifo et al. 2016). Given that native forest above 2000 m asl is still severely fragmented on the Santa Marta Mountains and that forest cover seems not to be increasing throughout its range, the species should not be downlisted until convincing evidence of a reverting declining trend–in its population, AOO or habitat quality–is documented.

    References:
    ** Córdoba-Córdoba, S. (2016). Myiothlypis basilica. In Libro rojo de las aves de Colombia vol. II: especies acuáticas de ecosistemas abiertos y secos, tierras altas del Darién, Sierra Nevada de Santa Marta e insulares (L. M. Renjifo, A. M. Amaya-Villarreal, J. Burbano-Girón, and J. Velásquez-Tibatá, Editors). Editorial Pontificia Universidad Javeriana, and Instituto de investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia.
    ** Renjifo, L. M., A. M. Amaya-Villarreal, J. Burbano-Girón, and J. Velásquez-Tibatá (Editors) (2016). Libro rojo de las aves de Colombia vol. II: especies acuáticas de ecosistemas abiertos y secos, tierras altas del Darién, Sierra Nevada de Santa Marta e insulares. Editorial Pontificia Universidad Javeriana, and Instituto de investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia.

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