[js1138]

How can one 'catch' something in the act of evolution if evolution is about small changes at the DNA level over long periods of time?

Ring species are currently in the act of evolution.

[MEGoody]

"Ring species are currently in the act of evolution."

So you can actually 'catch them in the act' of evolving? Gee, I'd like to see that. Grow a new appendage right before your very eyes!