The baritone call of the bullfrog is so deep and resonant, it resembles the mooing of a cow, hence its name. Only males emit this trademark "jug-o-rum" bellow, and their choruses can be heard during ...
Department of Dermatology, Poznan University of Medical Sciences, Poznan, Poland Department of Skin Diseases, Provincial Hospital, Poznan, Poland Department of Dermatology and Venereology, Poznan ...
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