La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	[Occurrence of the Bank Swallow Riparia riparia in the district of Dachau and its adjoining districts from 1896 to 2000]
Auteurs :	Hans-Joachim Hage, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (40(1) April, 2001)
Article en page(s) :	31-45
Résumé :	The results of this study is based on bibliographical references, oral information by local people and ornithologists as well as the author's observations during the last 20 years. Around 1900, there used to be only one natural habitat for the Bank Swallow, therefore all colonies which can be found nowadays in the study area are directly correlated to human activities in nature. Today this is the extraction of sand and gravel in quarries. In 2000 the number of breeding couples amounts to 1012+-15% in the area covered by this study, 591+-15% of which can be found in the district of Dachau itself. The future prospects of Riparia riparia in this region seem to be rather negative due to three main factors: 1) continous quarrying during the breeding season, 2) deliberate destruction of the breeding holes by quarry owners, fishermen, sunbathing people and children and 3) authorities demanding recultivation after the end of quarrying, which often destroys completely the fauna and flora of the habitat.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...