The only reason these people is left "speechless" is because of the stupidity of the question. What this guy is basically asking for is someone to present the evidence of a monkey giving birth of a human, but that is not how evolution works and why so many people fail to understand evolution. Not only that, but asking for an example from one kind to another, without defining what your meaning of kind is, you will get the answers you got, because that is also a different kind. Saying but it's still a bird is stupid, because it's a different kind of bird or different kind of fish and so on.
The Darwin finches is a good example of observed evolution, which happened over a very short time, considering the time scale we are working with when it comes to evolution as a whole. We are talking about billions of years, and with a lot of micro-evolutions happening over vast of time, can create significant changes and be considered as macro-evolution.
For now we only had 150 years to do actual observing (following the theory of evolution), on a planet there is believed to be more than 4 billion of years old. What kind of observations does this guy really expect here? Big changes and natural selection comes into play when it's needed, because species has to survive changes in our environment or something like that. If you take human specie, we are very young, and the time scale of our existence as human specie is very short.
It's easy to hang on to such a believe as intelligent design, not only because it might have been what you have been taught as a child, but because it doesn't require people to actually study and use their mind. Evolution on the other hand can be difficult to truly understand, and will require people to actually open their mind and start using it for themselves.
Trying to dismiss all the data we got on fossil records among other things, and require observable changes from one "kind" to another is just folly and playing dumb.
He should try to pick up a book which is not only literature such as the bible, and try to actually do some studying on this matter, instead of picking up a microphone and make himself look ignorant.