Summary
The release calls of male European toads (B. bufo L.,B. calamita Laur.,B. viridis Laur.) have been described and recorded in the form of spectrograms and oscillograms. While only 1 type of release call is uttered byB. bufo, inB. viridis andB. calamita 2 and 3 types respectively were found. The latter 2 species show a close relationship,B. calamita being the most highly developed toad in Europe.
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Flindt, R., Hemmer, H. Analyse des akustischen Geschlechtererkennungsmechanismus (Befreiungsrufe) bei Kröten (GenusBufo). Experientia 24, 285–286 (1968). https://doi.org/10.1007/BF02152821
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DOI: https://doi.org/10.1007/BF02152821