Resumen

ZUNIGA, Alfredo H.  y  MARTIN SUBERCASEAUX, Francisco. Comparison of the diet of the Chimango Caracara (Milvago chimango) and the Burrowing Owl (Athene cunicularia) in a peri-urban site of central Chile. Huitzil [online]. 2020, vol.21, n.2, e588.  Epub 17-Oct-2022. ISSN 1870-7459.  https://doi.org/10.28947/hrmo.2020.21.2.497.

Trophic differentiation among raptors plays an essential role in their coexistence, a situation­ that becomes especially problematic when there is a transformation of the habitat, leading to changes in the availability of resources. In December 2018 we exa­ mined the diet of Milvago chimango and Athene cunicularia in central Chile, in an area close to a landfill in Montenegro. We collected 226 pellets of M. chimango and 68 pe­ llets of A. cunicularia, and observed that both species concentrated a high proportion of their prey around arthropods (mainly class Insecta, with 54% and 64% for M. chiman­ go and A. cunicularia, respectively), with variations in the consumption of the different orders and families in each case. Both raptors had differences in the consumption of birds (5.36% for M. chimango and 1.42% for A. cunicularia) and mammals­ (2.53% for M. chimango and 7.13% for A. cunicularia). Both species also showed a high dietary overlap (S = 0.94). The spatial and hunting differences of each species have resulted in mechanisms that would explain their coexistence in the study area.

Palabras llave : arthropods; central Chile; dietary overlap; garbage; pellets.

        · resumen en Español     · texto en Español     · Español ( pdf )