Budka, Michał http://orcid.org/0000-0002-1244-013X
Matyjasiak, Piotr http://orcid.org/0000-0003-0384-2935
Typiak, Jakub
Okołowski, Mateusz
Zagalska-Neubauer, Magdalena http://orcid.org/0000-0002-9738-1393
Funding for this research was provided by:
Narodowe Centrum Nauki (2014/15/B/NZ8/00272)
Article History
Received: 22 March 2018
Revised: 1 October 2018
Accepted: 26 February 2019
First Online: 19 March 2019
Compliance with ethical standards
:
: This study was conducted according to Polish law. We obtained all required permissions to conduct the study: permission of the Ethics Committee on Animal Experiments (no. 021/2016) and permission of the Regional Directorate of Environment Protection (no. WPN.-I.6401.73.2016.EB.2). The birds were caught under licenses issued by the Polish Bird Ringing Centre.
: The sound recordings are available at ExternalRef removed.