The following information was missing from the Funding section: Bioacoustic examination was supported by a research grant of the Hungarian Scientific Research Fund (OTKA K81929).
Footnotes
Competing Interests: No competing interests declared.
The following information was missing from the Funding section: Bioacoustic examination was supported by a research grant of the Hungarian Scientific Research Fund (OTKA K81929).
Competing Interests: No competing interests declared.