La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The occurence of the Barn Swallow Hirundo rustica in northern Bielefeld and it's dependence on different environmental factors.
Auteurs :	Daniel Luehr, Auteur ; Moritz Groeschel, Auteur
Type de document :	Article
Dans :	Vogelwarte (44(4) NOV 2006)
Article en page(s) :	229-232
Langues:	Allemand
Résumé :	In the present study, a census of breeding pairs of Barn Swallows Hirundo rustica was conducted in a suburban area of Bielefeld (Germany, Northrhein-Westfalia). Relations between environmental factors and the appearance of breeding pairs were examined. The study showed that the nearby occurrence of cattle or horse husbandry, of grassland or water was strongly coupled with the presence of breeding Barn Swallows. This is probably due to the increased food supply in the form of insects present in these areas. The decrease of breeding pairs may be attributed to the disappearance of animal husbandry and the associated well structured cultural landscape with rich insect supply, particularly during bad weather periods.

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