How is the vocalization of the Southern Leopard Frog (*L. sphenocephalus*) often characterized in comparison to the Northern species?

Answer

A slower, more drawn-out, "guttural" quality

The Southern Leopard Frog's advertisement call tends to have a slower, more drawn-out, and guttural quality compared to the Northern species' rapid, low-pitched snore or cackle.

How is the vocalization of the Southern Leopard Frog (*L. sphenocephalus*) often characterized in comparison to the Northern species?
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