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Marti, J.

Habitat und Bestand der Heckenbraunelle Prunella modularis im Kanton Glarus.

2018

115

81–90

Key words
(von 1994 bis 2006 vergeben)

Verbreitung, Brutgebiet, Höhenverteilung, Habitatwahl, Lebensraum, Waldgesellschaft, Reviere, Dichte, Bestand

Schlagwort_Vogelart
(wissenschaftlich)

Prunella modularis

Schlagwort_Vogelart
(deutsch)

Heckenbraunelle

Glarus, Schweiz

deutsch

Abhandlung

Habitat and population of the Dunnock Prunella modularis in the canton of Glarus (Switzerland). – In the canton of Glarus on the northern edge of the Swiss alps, 58 study plots with an area of 1 km2 each were searched for singing Dunnocks in 2015 and 2016. Of the total of 899 observed territories, 33 % were in coniferous forest, 8 % in broad-leaved forest, 11 % in mixed forest, 23 % at meadows or pastures with scattered trees, and 24 % in shrubs of alder Alnus viridis. Only 11 territories were found below 1000 m a.s.l. The highest densities were observed between 1350 and 1850 m, with a maximum of 33 territories in a single 1-km2 plot. Highest densities were 7.0 territories/10 ha in coniferous forest, 5.2 territories/10 ha in mixed forest, 4.5 territories/10 ha each in alder shrubs and broad-leaved forest, and 1.4 territories/10 ha at pastures. The estimated total population of Dunnocks in the canton of Glarus (685 km2) was 5200 to 6000 territories. Overall densities were thus higher than in similar regions like Vor­arlberg and the Pays d’Enhaut, which may indicate that, for the Dunnock, the canton of Glarus offers particularly suitable conditions in forest habitats, topography, or climate.