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Boschert, M.

Auftreten des Drosselrohrsängers Acrocephalus arundinaceus in kleinen Schilfgebieten am badischen Oberrhein und Hochrhein.

2016

113

321–326

Key words
(von 1994 bis 2006 vergeben)

Lebensraum, Habitatgrösse, Besiedlung, Dichte, Schilfröhricht

Schlagwort_Vogelart
(wissenschaftlich)

Acrocephalus arundinaceus

Schlagwort_Vogelart
(deutsch)

Drosselrohrsänger

Oberrhein, Hochrhein, Baden-Württemberg, Deutschland

deutsch

Abhandlung

Occurrence of the Great Reed Warbler Acrocephalus arundinaceus in small reed beds in the Upper Rhine and High Rhine Valley in the Baden region. – The Great Reed Warbler is a critically endangered breeding bird in Baden-Württemberg with currently 50–90 territories. One of the main areas of distribution is located in the Upper Rhine plains of the northern Baden region. In the last years Great Reed Warblers were observed again in the southern Upper Rhine plains, and since at least 2015 also in the northern Upper Rhine plains, especially in the lowlands of the tributaries. They were observed in small reed beds of (10) 50 to 200 m2 at the maximum with dense stands at the water’s edge. The reed beds were situated next to ditches (two cases), artificially made small standing water bodies (four cases) and a river (two cases). Breeding was confirmed in one case, suspected in two, and in three cases singing birds and couples were present for some time. However, it remains open whether this is a temporary occurrence or a new development and whether the Great Reed Warbler in Western Central Europe also colonizes smaller reed patches, as it does especially in Eastern Central Europe. Possibly these observations, as others made in similar habitats, are not given the necessary attention. Following these observations during the breeding period 2013–2015, more efforts should be made to find out whether the species will appear in other small-size reed patches also in the coming years and eventually permanently colonize them.