Resumo

LAVARIEGA, Mario C. et al. Richness and conservation of birds in southwestern of Oaxaca. Huitzil [online]. 2020, vol.21, n.2, e591.  Epub 17-Out-2022. ISSN 1870-7459.  https://doi.org/10.28947/hrmo.2020.21.2.470.

The Mexican Pacific watershed in southwest Oaxaca is home to a great diversity of birds that has been little studied. We present an inventory and analysis of the birdlife of that region, collected through transects, mist nets and non-systematic observations, in 12 locations distributed in four vegetation types (sub-deciduous forest, riparian vegetation, areas subject to agricultural management and dry deciduous forest). We counted 120 species, corresponding to 39 families and 19 orders. Of the total number of species 72% were permanent residents and 24% winter residents. Categorized by their diet terrestrial insectivores (52%) were more abundant, followed by carnivores (20%) and terrestrial herbivores (15%). The highest number of species (68%) was associated with riparian vegetation. In this region of Oaxaca occurs 16% of the bird richness of Mexico, including nine species endemic or quasiendemic to Mexico, and 12 species that are classified into national or international risk categories, such as the Muscovy Duck (Cairina moschata), Lilac-crowned Parrot (Ama­ zona finschi), Yellow-headed Parrot (Amazona oratrix) and Bell’s Vireo (Vireo bellii). We recommend the protection of riparian vegetation and forests as the best strategy for the conservation of the avifauna.

Palavras-chave : risk category; endemism; trophic guild; checklist; Pacific coast lowland.

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