La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Diet of Kestrels Falco tinnunculus on grazed coastal meadows.
Auteurs :	Niels M. Schmidt, Auteur ; Hanne Hubertz, Auteur ; Henrik Olsen, Auteur
Type de document :	Article
Dans :	Dansk Ornitologisk Forenings Tidsskrift (96(4) 2002)
Article en page(s) :	171-175
Langues:	Anglais
Résumé :	The diet of Kestrels on a grazed coastal meadow in Denmark was investigated by pellet analysis. Compared to the availability of small mammal species, Kestrels showed a preference for field voles Microtus agrestis which made up 80% of the prey numbers. Common shrew Sorex araneus, pygmy shrew S. minutus, and water vole Arvicola terrestris were also found. Three grazing intensities were investigated of which the high grazing treatment resulted in low prey densities and the low grazing treatment in intermediary prey densities, compared to the ungrazed control areas. The fraction of field voles, however, was largest in areas with grazing of low intensity, and prey on the ungrazed areas may have been less accessible to Kestrels due to an extensive vegetation cover, so grazing at low intensity could be more beneficial for Kestrels than either no grazing or grazing at high intensity.

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