Description
They grow on average to be about 3.6 to 6 in (9.1 to 15 cm) in body length (although there are records of some up to 8.0 in (20 cm)), legs add another 7 to 10 in (18 to 25 cm) to length. Bullfrogs go from 5 to 175 g (0.18 to 6.2 oz) on average in the first 8 months of life. Large mature bullfrogs can weigh up to 500 g (1.1 lb), with exceptional ones attaining 800 g (1.8 lb).
The bullfrog skull is highly fenestrated; females have eardrums (tympana) the same size as their eyes. The males' eardrums are larger.
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