Fischer, Luisa http://orcid.org/0000-0002-4074-7198
Möller Palau-Ribes, Franca
Kipper, Silke
Weiss, Michael
Landgraf, Conny
Lierz, Michael
Funding for this research was provided by:
Justus-Liebig-Universität Gießen
Article History
Received: 15 January 2021
Revised: 28 June 2021
Accepted: 24 November 2021
First Online: 6 December 2021
Declarations
:
: Capturing, ringing, and probing were conducted in the framework of research projects on the behavioral ecology of free-ranging birds: communication, mate choice, and breeding- and population ecology in nightingales, Reg. 23–2347-4–2009 (Landesamt für Verbraucherschutz, Landwirtschaft und Flurneuordnung Frankfurt (Oder)); effects of supplementary feeding in great tits and blue tits—an experiment using stable isotopes,’ Reg. G 0060/11; and how hormones regulate vocal plasticity: the effects of melatonin and testosterone on song and mating success in nightingales,’ Reg. 00078/12 (Landesamt für Gesundheit und Soziales, Berlin).
: All authors contributed to data acquisition and writing of the manuscript
: All authors read and approved the final version.
: The authors declare no competing interests.