FOOD HABITS OF THE MAGELLANIC HORNED OWL (BUBO MAGELLANICUS) IN A COASTAL ISLAND OF PATAGONIA, ARGENTINA
DOI:
https://doi.org/10.58843/ornneo.v28i0.277Keywords:
Brown rat, Darkling beetles, Darwin´s gecko, Leones Island, Patagonia, Trophic ecologyAbstract
Abstract ∙ The Magellanic Horned Owl (Bubo magellanicus) is one of the most common nocturnal raptors in Patagonia. The aim of this note was to analyze the food habits of this species in a small island from the Patagonian Atlantic coast. Four nesting areas and eight adults of Bubo magellanicus were found; 217 pellets plus disaggregated material were collected. We identified 2774 individual prey items. Insects were the most consumed prey (63.56%), followed by reptiles (13.73%), arachnids (10.92%), mammals (10.42%), and birds (1.37%). Our study show B. magellanicus feeding mainly on arthropods and introduced species, a fact that was not previously reported for this species in Patagonia.
Resumen ∙ Hábitos alimenticios del Tucúquere (Bubo magellanicus) en una isla de Patagonia, Argentina El Tucúquere (Bubo magellanicus) es una de las rapaces nocturnas más comunes de la Patagonia. El objetivo de esta nota fue analizar los hábitos alimenticios de esta especie en una pequeña isla de la costa atlántica de la Patagonia. Se encontraron cuatro áreas de nidificación y ocho adultos de Bubo magellanicus y se recolectaron 217 egagrópilas además de material disgregado. Identificamos 2774 individuos presa. Los insectos fueron la presa más consumida (63,56%), seguidos por los reptiles (13,73%), los arácnidos (10,92%), los mamíferos (10,42%) y las aves (1,37%). La relevancia de este estudio reside en que B. magellanicus se alimenta principalmente de artrópodos y especies introducidas, hecho que no se había reportado previamente para esta especie en la Patagonia.
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