<P> The tympanum is an external hearing structure in animals such as mammals , birds , some reptiles , some amphibians and some insects . </P>
<P> The tympanum is an external hearing structure in animals such as mammals , birds , some reptiles , some amphibians and some insects . </P>
where is the frog 's eardrum located on its body
where is the frog 's eardrum located on its body
tympanum
tympanum