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Bob Moul | all galleries >> Galleries >> AMPHIBIANS > Tympanum (eardrum)
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10-AUG-2008 Click Pic to return to gallery

Tympanum (eardrum)

You can tell the sex of a bullfrog
by comparing the diameter of the eye with the ear drum (Tympanum)
If the tympanum is much larger than the eye, it's a male.
If it's the same size or a bit smaller it is a female.

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