Kulibaba, R. O.
Liashenko, Yu. V.
Article History
Received: 3 March 2021
Revised: 25 March 2021
Accepted: 1 July 2021
First Online: 23 July 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests.</i> The authors declare that they have no conflicts of interest.
: <i>Statement on the welfare of animals.</i> Studies were carried out using <i>Bubo bubo</i> feathers as a source of biological material without direct manipulations concerning birds.