Continuous and intermittent calling song of Cicadatra atra(A) spectrogram and oscillogram of the song showing the transition from continuous song to the calling song with short echemes; (B) oscillogram of the enlarged part of the transition from the continuous song to the calling song with short echemes corresponding to the inverted window in (A).

 
  Part of: Trilar T, Gjonov I, Gogala M (2020) Checklist and provisional atlas of singing cicadas (Hemiptera: Cicadidae) of Bulgaria, based on bioacoustics. Biodiversity Data Journal 8: e54424. https://doi.org/10.3897/BDJ.8.e54424