Say What? Animals

Whether froglets switch sexes distinguishes ‘sex races’

Amphibian starts all female in one region of Europe; in another, with gonads of either sex

common frog

OFF TO THE RACES  What’s called the common frog in Europe (shown here  in Switzerland) is one widespread species even though different races vary in their potentially sex-reversing lifestyles.

Andreas Meyer

By Susan Milius

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