Young Earth Creationists and Hyperevolution.

It seems rather odd but if you look for it, a number of YEC people believe in hyper-evolution. They believe that only the "kinds" of animals survived on the Ark and then diversified after being returned to the newly purged Earth. I've even heard some creationists go so far as to suggest that "birds" is a "kind". This means that over the last four thousand years or so that doves haven't just diversified in to the rock pigeon and all the fancy birds that fanciers fancy, but the hummingbird and the ostrich. It is one thing to suppose that a lone wolf became every variety of dog as well as all the varied wolf species, but if we are to believe that a mass extinction of so much biodiversity occurred four thousand years ago, there must also be hyper-diversification over the extraordinarily fast periods of time.