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Nahrung adulter und nestjunger Schwarzkehlchen (Saxicola torquata rubicola) einer westfalischen Brutpopulation


Vogelwelt, 1082: 41-57
Nahrung adulter und nestjunger Schwarzkehlchen (Saxicola torquata rubicola) einer westfalischen Brutpopulation
This study in the food of adult and nestling stonechats is based on 1768 faecal samples and 78 collar samples from a Westfalian breeding area. More than 80% of the diet consists of coleoptera, diptera, larvae, hymenoptera and arachnida, which differ in their importance according to the season. It is to render that coleoptera are mainly taken from March to July and in October as the importance of adult lepidoptera, saltatoria, formicida and tipulida in August and September while larvae, diptera, apocrita and symphyta as hemiptera are prey over the whole period from March to October. Structures of the feeding habitat are described. The prey was caught only from the surface of plants and areas which are free of vegetation or out of the air. The food of nestlings and adults is compared. It is proved that nestlings prefer softer diet. The stonechat's food from the investigated area in Westfalia is compared to that of lowland meadows at the Lower Rhine (60 samples) and to data of literature of a heath in Great Britain (Greig-Smith & Quicke 1983). Significant differences in the quantitative composition between the food in pasture ground and heath in spite of a similar offer of food (i.e. groups of prey) can be shown. It is to consider for ecomanagement that the offer of food for stonechats is only to save by pasturing.

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Accession: 021390026



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