Petr Balej, quadrate 34TFN3
id2604, Pelophylax ridibundus, Bulgaria > Western Stara Planina Mts. > Berkovica, Berkovitsa, cca 570 m a. s., Petr Balej, 11.09.2008, 07.12.2008, 2 juv.
id2583, Rana temporaria, Bulgaria > Western Stara Planina Mts. > Berkovica, Berkovitsa, cca 800 m a. s., Petr Balej, 11.09.2008, 19.11.2008, 1 adult
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