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Bühlmann, J., S. Lüscher & M. Müller

Bestandsveränderung des Mittelspechts Dendrocopos medius im Kanton Thurgau 2005–2015.

2018

115

1–10

Key words
(von 1994 bis 2006 vergeben)

Verbreitung, Siedlungsdichte, Bestandsentwicklung, Bestandsveränderungen, Eichenförderung, Forstwirtschaft

Schlagwort_Vogelart
(wissenschaftlich)

Dendrocopos medius

Schlagwort_Vogelart
(deutsch)

Mittelspecht

Thurgau, Zürich, Schweiz

deutsch

Abhandlung

Population trend of the Middle Spotted Woodpecker Dendrocopos medius in the canton of Thurgau 2005–2015. – In 2005, oak forests of the canton of Thurgau were searched for the first time for Middle Spotted Woodpeckers. In 2015, we surveyed the same forests and some new locations using the same method. A total of 244 territories of Middle Spotted Woodpeckers were found, and the population has increased by 119 territories or 95 % since 2005. However, the increase in the canton of Thurgau was only about half as large as in the canton of Zurich. The low population density in the central part of the Seerücken is a cause for concern, with populations at Mammern and Härdli showing the only declines observed. As a result, the Seerücken is still only weakly connected with the populations in western Thurgau. In the forest reserves and areas for promotion of oaks, and their surroundings, we found 123 territories in 2015, which corresponds to about half of the population. Measures such as the establishment of forest reserves, for example in floodplains, and of areas for promotion of oaks should be continued. Another important aspect is the further promotion of deadwood that may serve woodpeckers for searching food and for the construction of nesting caves.