Funding for this research was provided by:
H2020 European Research Council (Adg 666669)
Article History
Received: 4 August 2020
Revised: 4 December 2020
Accepted: 8 December 2020
First Online: 12 January 2021
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: The starling study was approved by Newcastle University Animal Welfare Ethical Review Board committee and was conducted under U.K. Home Office project licence (number PPL70/8089).
: All raw data and code are freely available via the Zenodo repository at: ExternalRef removed (ExternalRef removed).