Selective consumption of rodents by the Variable hawk Geranoaetus polyosoma (Accipitriformes: Accipitridae) in the Atacama Desert, northern Chile

By

Muñoz-Pedreros, Andrés
Norambuena, Heraldo V.
Gil, Claudia
Rau, Jaime R.

Type

Article

Date of Publication

2020-12-7

Original Publication

Zoologia

Volume

37

Pages

1--6

Subjects

Diet , predation , Red-backed Hawk , trophic ecology.

Contributed by

Pensoft Publishers

Language

English

Published by

Curitiba, PR, Brasil Sociedade Brasileira de Zoologia [2009]-

Identifiers

DOI: https://doi.org/10.3897/zoologia.37.e55615

 

Abstract

Geranoaetus polyosoma(Quoy & Gaimard, 1824) is a diurnal raptor widely distributed in South America. Although the trophic ecology of this bird has been more studied in the southern extreme of its range, little information is available on its dietary response to prey supply in desert environments. In the present study, we report on the trophic ecology ofG. polyosomain a sub-urban desert zone in northern Chile, with the following objectives: (1) to quantitatively describe its diet and (2) to determine its dietary selectivity in response to prey supply in the study area. The diet ofG. polyosomaconsisted mainly of rodents (97.2%). A greater preference (p < 0.05) was observed for the following large prey items (> 19.5 g): two native rodent species,Phyllotis xanthopygus(Waterhouse, 1837) andEligmodontia puerulus(Philippi, 1896); and two introduced rodent species:Rattus rattus(Linnaeus, 1769) andR. norvegicus(Berkenhout, 1769).