vtáctvočorík bahenný Autor: adminaktualizované17.4.201723.8.2014 Chlidonias hybrida http://www.xeno-canto.org/sounds/uploaded/BPSDQEOJWG/XC328632-Vitvingad%20t%C3%A4rna-lockl%C3%A4te-Biebrza%20NP-%282016-05-10%2010.23%29-LS141721BB.mp3