Funding for this research was provided by:
Swedish Research Council (2013-8271)
Knut och Alice Wallenbergs Stiftelse (2014.0044)
Received: 26 August 2022
Accepted: 11 January 2023
First Online: 19 January 2023
: Not applicable. No human or animal experiments were conducted in this study. All samples in this study were collected from dead birds or museum samples. No live animals were used or experimented on. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.