Article History
Received: 5 February 2021
Revised: 30 December 2021
Accepted: 24 January 2022
First Online: 18 February 2022
Declarations
:
: The corresponding author declares on behalf of authors that there is no conflict of interest to disclose.
: All operations were conducted under the programme ‘Research of birds in the disclimax ecosystems’ approved by the Institute of Biological Sciences, Siedlce University of Natural Sciences and Humanities (number of approval: IB.5030.8.2018). The study fulfilled the current Polish Law and was permitted by Ministry of the Environment (approval number: 425/2019) and Regional Directorate for Environmental Protection in Warsaw allowed for this research project by the letter (number of approval: WSTS.6401.34.2018.MO).
: Not applicable.
: Not applicable.