La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Diet of Short-eared Owl Asio flammeus at winter roosting sites.
Auteurs :	Holger Meinig, Auteur ; Michael Kuhn, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (123(3) 2002)
Article en page(s) :	149-153
Résumé :	The Short-eared Owl Asio flammeus occurs in Germany during winterly invasions and, appart from regular breeding sites on the North Sea islands, in the inner country only as an irregular breeding bird. Two series of pellets from 1979 and winter 1995/96 from the Erftkreis (Northrhine-Westphalia) were analysed (Tab. 1). The main prey species was the Common Vole Microtus arvalis with 94.2% (n = 188) and 97.2% (n = 1009). The analyses of winter pellets published by other authors show also very high portions of Common Voles in the diet of the Short-eared Owl (between 72.9 and 100 %). The decline, or in some federal states the total failure, of breeding activities of the Short-eared Owl during the past 20 years, even after winterly invasions, is explained by drainage measures and intensification of the agricultural land use. Thus, even for the Common Vole it has become impossible to reach high densities over large areas.

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