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Notes on the ecology, conservation and taxonomic status of Hylorchilus wrens

  • Philip W. Atkinson (a1), Mark J. Whittingham (a2), Hector Gomez de Silva Garza (a3), Adam M. Kent (a4) and Ruth T. Maier (a5)...

Summary

Fieldwork conducted in Veracruz and Chiapas, Mexico, between July and December 1991 indicates that the genus Hylorchilus merits retention and that the two forms, H. (sumichrasti) sumichrasti and H. (s.) navai, are good species, based chiefly on this study's discovery of their very different voices. Both are, however, ground-level feeders on invertebrates gleaned from limestone outcrops under closed-canopy forest, and both are at risk from habitat loss. Despite the very restricted range of H. navai and threats to its habitat the population is partially protected and so it is recommended it be allocated IUCN status “Rare”, while H. sumichrasti merits the existing classification “Vulnerable/Rare”.

Los trabajos de campo realizados en Veracruz y Chiapas, México, entre Julio y Diciembre de 1991 indican que el género Hylorchilus merece ser mantenido, y que las dos formas, H. (sumichrasti) sumichrasti y H. (s.) navai, son especies válidas, en base a las diferencias de voz descubiertas en este estudio. Ambas especies se alimentan a nivel del suelo, a base de invertebrados que capturan sobre rocas calizas en áreas de selva cerrada, y ambas están amenazadas por la pérdida de su hábitat. A pesar de que H. navai tiene un área de distribución muy pequeña y de que su hábitat está amenazado, la población está parcialmente protegida y por lo tanto se recomienda que se le considere en la categoría de amenaza “Rara” de la UICN, mientras que H. sumichrasti debe continuar como “Vulnerable/Rara”.

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Copyright

References

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AOU (in prep.) Checklist of the birds of Mexico. Seventh edition. Auk. Supplement no 37.
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Crossin, R. S. and Ely, C. A. (1973) A new race of Sumichrast's Wren from Chiapas, Mexico. Condor 75: 137139.
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Hardy, J. W. and Delaney, D. J. (1987) The vocalizations of the Slender-billed Wren (Hylorchilus sumichrasti): who are its close relatives? Auk 104: 528530.
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Phillips, A. R. (1986) The knowm birds of North and Middle America, part 1. Denver, Colorado: Allan R. Phillips.
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Sibley, C. G. and Monroe, B. L. (1990) Distribution and taxonomy of the birds of the world. New Haven: Yale University Press.

Notes on the ecology, conservation and taxonomic status of Hylorchilus wrens

  • Philip W. Atkinson (a1), Mark J. Whittingham (a2), Hector Gomez de Silva Garza (a3), Adam M. Kent (a4) and Ruth T. Maier (a5)...

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