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).
So they’ve made their own post in reply, and I can summarize it in five words:
variation within a created kind. And of course, unlike the real scientists who argue that these changes occurred over hundreds of thousands of years, they can say it all happened within a few thousand.
That was one of the more striking observations at the Creation “Museum”: they can accept a limited version of reality, because they have to, but they take the science and relabel it, and further, accelerate the pace of change by many orders of magnitude into some kind of god-fueled hyper-evolution, and it’s all OK.