Frogs, Part 2

I was talking about the peepers here, but got carried away on something else. There's an important linguistic point I left out. If you're a frog, you make the same sound wherever you live, but, depending on where you are, the people living there will imitate the sound differently. Take this as an excellent example.

And how, one might ask, do the animals imitate the sounds of the human voice? Specifically, how do the dolphins imitate human singing? Stay tuned.