As the Slacktivist once pointed out, "Ken Ham is from Australia. You're not allowed to be a young-earth creationist and be from Australia. I don't think you're even allowed to be a young-earth creationist and believe in Australia."
I ponder that, he grew up in a country with all of the worlds Monotremes and most of it's Marsupials and steadfastly believes that they all scuttled, swam and hopped their way from Mt Ararat to the southern hemisphere.
Weird.