1Department of Wildlife Diseases, Leibniz Institute for Zoo and Wildlife Research, Alfred‑Kowalke‑Straße 17, 10315 Berlin, Germany
2Institute for Ecological Chemistry, Plant Analysis and Stored Product Protection, Julius Kühn-Institut, Königin‑Luise‑Straße 19, 14195 Berlin, Germany
3Wiesenweihenschutz Brandenburg, Hauptstraße 11, 14913 Rohrbeck, Germany
4Department of Animal Behaviour, Bielefeld University, Morgenbreede 45, 33615 Bielefeld, Germany
5BioConsult SH, Schobüller Straße 36, 25813 Husum, Germany
6Arbeitsgemeinschaft Biologischer Umweltschutz/Biologische Station Soest, Teichstraße 19, 59505 Bad Sassendorf, Germany
7Independent, Bützow, Germany
8Müskens Fauna, van Nispenstraat 4, 6561 BG Groesbeek, The Netherlands
9Förderverein Vogelschutzwarte Neschwitz, Park 4, 02699 Neschwitz, Germany
10Natuurplaza, P.O. Box 1413, NL‑6501 BK Nijmegen, The Netherlands
11Department Chemicals, Umweltbundesamt, Wörlitzer Platz 1, 06844 Dessau‑Roßlau, Germany
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