Diet of the Great Horned Owl Bubo virginianus (Strigidae) on the western slopes of the Antisana volcano, Ecuador

Authors

DOI:

https://doi.org/10.18272/reo.v11i1.3328

Keywords:

Cricetidae, Natural History, paramo, pellet, Phyllotis haggardi, prey selection, rodents, small mammals, trophic ecology

Abstract

The Great Horned Owl (Bubo virginianus) is the largest nocturnal bird of prey in the Neotropics. In Ecuador, its ecology is little known. We collected 89 pellets and 38.2 g of disintegrated material in the perch of two adult individuals, in the paramos of the western slopes of the Antisana volcano. We identified 197 preys belonging to seven taxa. Phyllotis haggardi was the most common prey (61%), and Sylvilagus andinus was the one that contributed the greatest biomass (84.9%). Phyllotis haggardi, Cryptotis osgoodi, and Microryzomys altissimus were previously unlisted prey in this owl's diet. B. virginianus in the paramos of the western slopes of the Antisana volcano showed a specialist diet and a selective foraging strategy.

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References

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Published

2025-07-02

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How to Cite

Rios, M. C., & Cadena-Ortiz, H. (2025). Diet of the Great Horned Owl Bubo virginianus (Strigidae) on the western slopes of the Antisana volcano, Ecuador. Revista Ecuatoriana De Ornitología, 11(1), 59-65. https://doi.org/10.18272/reo.v11i1.3328

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