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Bachman's Sparrows Use Burrows and Palmetto Clumps as Escape Refugia from Predators (Individuo de Aimophila aestivalis utiliza guarida en palma para refugiarse contra depredadores)

Tylan F. Dean and Peter D. Vickery
Journal of Field Ornithology
Vol. 74, No. 1 (Winter, 2003), pp. 26-30
Published by: Wiley on behalf of Association of Field Ornithologists
Stable URL: http://www.jstor.org/stable/4131084
Page Count: 5
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Bachman's Sparrows Use Burrows and Palmetto Clumps as Escape Refugia from Predators (Individuo de Aimophila aestivalis utiliza guarida en palma para refugiarse contra depredadores)
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Abstract

We documented Bachman's Sparrows (Aimophila aestivalis) entering natural burrows on six different occasions on a dry prairie in central Florida. Use of burrows was apparently an attempt to escape potential predators. Although Bachman's Sparrows were usually flushed from grass-dominated microsites, they preferred to fly to palmetto clumps (Serenoa repens) that had burrows rather than palmetto clumps lacking burrows. This behavior has inherent risks because these burrows are often used by a variety of animals, including predators of small passerines. /// Documentamos a un individuo de Aimophila aestivalis entrando en seis ocasiones a una guarida natural en un palmeto en un área caracterizada como pradera seca en la parte central de Florida. La guarida se utilizó, aparentemente, para escapar de depredadores potenciales. Aunque los pinzones de Bachman fueron espantados de áreas dominadas por yerbas, estos preferían moverse a palmares de Serenoa repens que tuvieran guaridas o huecos entre pencas, que a palmares que no las tuvieran. Ésta conducta envuelve riesgo porque dichas guaridas son comúnmente utilizadas por otros animales incluyendo depredadores de aves pequeñas.

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