Funding for this research was provided by:
Přírodovědecká Fakulta, Univerzita Karlova (260571/2020)
Received: 4 November 2020
Accepted: 26 April 2021
First Online: 1 May 2021
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. Permission for studies on birds was granted by the Ministry of the Environment of the Czech Republic (18232/ENV/15), licenses permitting experimentation with animals no. CZ01629 and CU 02766 were issued by the Ministry of the Agriculture of the Czech Republic. This research complied with ASAB/ABS guidelines for the use of animals in research and with all the relevant Czech legislation.
: Not applicable.
: The authors declare that they have no competing interests.