Dept. of Biology, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121, EEUU | Laboratorio de Investigaciones Ecológicas de las Yungas, CC 34, 4107 Yerba Buena, Tucumán, Argentina
John G. Blake
Dept. of Biology, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121, EEUU | Laboratorio de Investigaciones Ecológicas de las Yungas, CC 34, 4107 Yerba Buena, Tucumán, Argentina
Rougès, Mercedes, and John G. Blake. 2001. “Capture Rates and Diets of Understory Birds in Parque Biológico Sierra De San Javier, Tucumán”. El Hornero 16 (1): 7-15. https://doi.org/10.56178/eh.v16i1.909.
We used mist nets to sample birds in the understory of second-growth and mature forest within Parque Biológico Sierra de San Javier, Tucumán. Birds were sampled during the dry season (three samples from April to August 1994) and during the wet season (December 1994). We captured 343 birds representing 29 species. Two to six species accounted for from 54 to 88% of all birds captured (178 captures in second-growth, 165 in mature forest). Turdus rufiventris and Arremon flavirostris were the most frequently captured species overall. Capture rates were high (from 20 to over 40 birds captured per 100 mist-net-hours) in both habitats; total capture rate and captures of individual species varied more among samples in second-growth than in mature forest. Information on diets (fecal samples) was obtained from 178 birds. Invertebrates dominated samples collected during the dry season; occurrence of fruit in the diet increased during the wet season, paralleling the phenology of fruit production. Results are compared to those obtained during a similar study conducted in Parque Nacional El Rey, Salta.
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