SEEN - SE European Bird Migration Network
Study of migratory divide in the Reed Warbler (Acrocephalus scirpaceus) - an invitation to co-operation
Petr Prochazka
Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Kvetna 8,
CZ-60365 Brno, Czech Republic

Populations of migratory bird species often differ with respect to the location of their wintering grounds and therefore travel in distinct migratory directions. A region in which two populations showing different migratory directions meet is called a migratory divide. A classic example is the migratory divide between SW- and SE-migrating White Storks Ciconia ciconia. Similar divide is assumed also for the Reed Warbler Acrocephalus scirpaceus in Central Europe. In spite of the massive ringing effort of reedbed passerines, the latter divide has not yet been clearly demarcated. In the proposed study a combination of different approaches will try to identify the migratory divide in the Reed Warbler. The project will adopt both traditional methods (analysis of ringing recoveries, morphology, orientation cages experiments) and modern approaches (molecular markers, stable isotopes, blood parasites). The data can be then also used to measure migratory connectivity, to analyse the phylogeographic population structure and perhaps to reconstruct the post-glacial colonisation of Europe by the Reed Warbler. All people willing to participate in the project are warmly welcome and asked to contact the project coordinator.
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