Question

When did the bullfrog evolve?

Answer 1

Evolution of mating strategies inbullfrogs, Rana catesbeiana. Evolution32: 850-871. Purgue, A. P. 1997. 

Answer 2

Explanation:

North American bullfrogs (Lithobates catesbeianus) are only native to the Nearctic region. They are found from Nova Scotia to central Florida, from the East coast to Wisconsin, and across the Great Plains to the Rockies.