Projekte
    zurück

    Publikationen

    

    Zbinden, N., V. Keller & H. Schmid (2005)

    Bestandsentwicklung von regelmässig brütenden Vogelarten der Schweiz 1990-2004.

    Further information

    Ornithol. Beob. 102: 271–282

    Contact

    niklaus.zbinden@vogelwarte.ch

    PDF

    Download

    Abstract

    Population trends are presented for regular breeding birds with a population size of at least 50 breeding pairs. Population indices were calculated on the basis of results from different monitoring programmes, mainly the common breeding bird monitoring programme and the monitoring programme for rare species, which collects observations in a semi-standardised way. Population trends were calculated for the fifteen-year period 1990 to 2004 and for the five-year period 2000 to 2004. 87 (58 %) of a total of 151 evaluated species showed a significant trend for the fifteen-year and/or the five-year period: 46 species increased over 15 years and 24 decreased. The group of species showing a decrease in both periods contains mainly species that winter south of the Sahara and at the same time experience habitat loss in the breeding range. Several species considered threatened and near-threatened on the 2001 Swiss Red List continued to decline during the last five years, in particular Northern Lapwing Vanellus vanellus, Common Redstart Phoenicurus phoenicurus, Whinchat Saxicola rubetra and Willow Warbler Phylloscopus trochilus;. The species with the strongest increases, Red-crested Pochard Netta rufina, Yellow-legged Gull Larus cachinnans and Rook Corvus frugilegus, colonised Switzerland only in the course of the 20th century.
    Keywords: Switzerland, breeding birds, population trend.