question on the evolution of flightless birds?

Once again, new research is requiring evolutionists to change the “facts” they have taught unsuspecting students for years. A large genetic study of flightless birds (African ostriches, Australian cassowaries and emus, New Zealand kiwis, and South American rheas) has concluded that their genes are more similar to birds that can fly than they are to each other. For example, the Australian cassowaries and emus, New Zealand kiwis, and South American rheas are all more genetically similar to tinamous (birds that can fly) than they are to African ostriches. This falsifies one of the many evolutionary “facts” I was taught at university.

Question:
What evolutionary “fact” does this research falsify?

What makes you think that flightless birds from island sanctuaries from all across the world would be genetically similar in the first place?

Take the case of the Kiwi (since I’m from New Zealand.) The geological evidence points to New Zealand having split from Gondwanaland before the KT boundary. That’s why there are no native mammals (except bats that obviously flew here). Birds became the dominant animal group and diverged to fill the available niches, so our flightless birds (Kiwi, Takahe, extinct Moas) have been geographically isolated for millions of years and diverged from flightworthy ancestors according to the fossil record. They are in no way related to Ostriches, Rheas or Emus. So it would be surprising if they were genetically similar.
The same applies for South American and Australian fauna. Have you ever wondered why there are no mammals in Aussie? Why all the niches are taken up by birds and marsupials? The answer lies in the timing of Australia’s split with Gondwanaland and the fact that Aussie has been geographically isolated since then. South America was isolated for many millions of years until the land bridge with North America formed. This was quite a recent event geologically speaking.

This research doesn’t falsify any evolutionary facts or theories. I know what you’re going to say… “It’s only a theory!” But it is the theory that best fits the evidence. Creationism simply doesn’t stand up to Occam’s razor.

The Kiwi Bird, National Bird of New Zealand