The European edible frog,Rana esculenta,croaking,with its twin vocal sacs inflated. The sacs are used as a resonant cavity to increase the volume of the call. R. esculenta is found throughout Europe. Although not native to Britian,it has been introduced by man and several colonies exist | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nuridsany, Claude / Perennou, Maria |
Bildgröße: | 5234 px × 3468 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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