Carl Zimmer wrote a good article on bedbugs as an example of evolution. In their shift to human victims, they’ve acquired a new morphology and new physiological requirements, and are distinctly and clearly different from their ancestors that fed on bats.
Answers in Genesis, though, has this idea that their perspective is just as valid as that of scientists: they claim to be viewing the same evidence just as fairly, but through the lens of the Bible rather than those crude human-made texts (I think you can see a problem right there).