Calling male pool frog photographed at the end of an advertisement call. The body is narrow because the lungs are empty, the paired vocal sacs are inflated. The picture was taken at the Rohrsee in Baden-Württemberg, Germany.
Prof. emer. Hans Schneider (Geyersberg)
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>