Funding for this research was provided by:
Fonds Wetenschappelijk Onderzoek (1.1.434.18N, G0A36.15, G0A36.15)
Article History
Received: 18 January 2020
Revised: 4 March 2020
Accepted: 10 March 2020
First Online: 20 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Experiments were approved by the ethical committee of the University of Antwerp (ID 2014-88 and ID 2017-23) and performed in accordance with Belgian and Flemish laws. The Royal Belgian Institute of Natural Sciences provided ringing licences for all authors and technicians.