Funding for this research was provided by:
Projekt DEAL
Article History
Received: 10 August 2020
Revised: 16 December 2020
Accepted: 21 December 2020
First Online: 16 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The authors confirm that all experiments were carried out under the current law for scientific bird ringing in Russia, and all necessary permissions were obtained. Approval from an ethics committee was not required, but all applicable international, national, and institutional guidelines for the use of animals were followed.
: All authors ensure that the Publisher has the Authors’ permission to publish the enclosed work.