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The study of foraging behavior is useful to understand how birds use the environment and what factors play an important role In habitat selection. We evaluated the maneuvers used to capture prey and the selection of foraging microhabitat by the White-crested Elaenia (Elaenia albiceps chilensis), a very abundant migratory bird In Patagonian forests during spring and summer. Behavioral observations were made in mixed forests of Cohlue (Nothofagus dombeyi) and Cypress (Austrocedrvs chilensis). We compared patterns between forests that experienced tree extraction of the first species to others in which no human alterations took place. In both forests conditions, White-crested Elaenlas mainly used sally-hovering to capture prey and to a lesser extent glean and sally-strike. The most commonly used substrate for prey capture was the foliage. The foraging microhabitat selected in both sites was the canopy, and Coihue trees. The rest of the vegetation profile and other species of trees and shrubs were used less than expected by chance. It Is thought that birds that capture their prey by hovering are not constrained by the structure of the vegetation; however, White-crested Elaenlas selected specific foraging microhabitats, suggesting that other environmental variables, such as differences In food supply, could drive the foraging behavior of this species. Coihue trees extraction in the past did not change the foraging behavior of White-crested Elaenias, and it could be negative for populations that eventually face alteration of native evergreen forests of Patagonia. © The Neotropical Ornithological Society.


Documento: Artículo
Título:Foraging behavior and microhabitat selection of the white-crested Elaenia (Elaenia albiceps chilensls) in patagonia forests
Autor:Chust, L.; Cueto, V.R.; Navarro, C.G.; Bravo, S.P.
Filiación:Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Piso 4, Pabellón 2, C1428EHA, Buenos Aires, Argentina
Palabras clave:Argentina; Elaenia albiceps chilensis; Foraging behavior; Frugivore-insectivore birds; Microhabitat selection; Neotropical austral migrants; White-crested Elaenia
Página de inicio:313
Página de fin:323
Título revista:Ornitologia Neotropical
Título revista abreviado:Ornitol. Neotrop.


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---------- APA ----------
Chust, L., Cueto, V.R., Navarro, C.G. & Bravo, S.P. (2012) . Foraging behavior and microhabitat selection of the white-crested Elaenia (Elaenia albiceps chilensls) in patagonia forests . Ornitologia Neotropical, 23(3), 313-323.
Recuperado de [ ]
---------- CHICAGO ----------
Chust, L., Cueto, V.R., Navarro, C.G., Bravo, S.P. "Foraging behavior and microhabitat selection of the white-crested Elaenia (Elaenia albiceps chilensls) in patagonia forests " . Ornitologia Neotropical 23, no. 3 (2012) : 313-323.
Recuperado de [ ]
---------- MLA ----------
Chust, L., Cueto, V.R., Navarro, C.G., Bravo, S.P. "Foraging behavior and microhabitat selection of the white-crested Elaenia (Elaenia albiceps chilensls) in patagonia forests " . Ornitologia Neotropical, vol. 23, no. 3, 2012, pp. 313-323.
Recuperado de [ ]
---------- VANCOUVER ----------
Chust, L., Cueto, V.R., Navarro, C.G., Bravo, S.P. Foraging behavior and microhabitat selection of the white-crested Elaenia (Elaenia albiceps chilensls) in patagonia forests . Ornitol. Neotrop. 2012;23(3):313-323.
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