Artikel-Suche

Weggler, M., Y. Schwarzenbach & M. Widmer

Stabiler Lokalbestand und langjährig benutzte Brutplätze beim Eisvogel Alcedo atthis am Hochrhein.

2015

112

251–258

Key words
(von 1994 bis 2006 vergeben)

Bestand, Bestandsdichte, Besetzungshäufigkeit des Brutplatzes, Jahresbruten, Brutverluste, Brutaktivität, Zahl der Eistage, Optimalhabitat

Schlagwort_Vogelart
(wissenschaftlich)

Alcedo atthis

Schlagwort_Vogelart
(deutsch)

Eisvogel

Katon Schaffhausen, Kanton Zürich, Neuhausen, Rheinsfelden, Schweiz

deutsch

Abhandlung

Stable local population of the Common Kingfisher Alcedo atthis at the Upper Rhine and long-term use of breeding sites. – Over 13 years, the local breeding population and breeding localities of Common Kingfishers Alcedo atthis were monitored along a 30.8 km river stretch at the Upper Rhine. The local breeding population varied between 5 and 7 pairs. No correlation was found between the size of the local population and the number of ice days in the previous winter. Kingfishers occupied repeatedly the same 10 breeding localities, some of them for over 13 consecutive years. Based on the high occupation rate of breeding sites, the study area appears to be an optimal habitat. The described situation contrasts with the general picture of a species with high fluctuation in numbers and constantly changing breeding sites. We attribute this to habitat features typical for rivers with buffered flood regimes. The conservation of these highly attractive, durable nest sites should have priority in species action plans.