But the large, hard beaked finches can no longer mate successfully with small narrow beaked finches. Speciation = evolution.
How in the world can you call that Speciation?
It’s still a Finch and will either survive or go extinct as a finch.
When you breakdown Darwinian Evolution honestly, the biology, it’s death.
Genetic drift?
Please explain how that works to create new species.
The definition of a species is creatures or plants that can successfully mate and have full functioning offspring. Thus, there are many species of birds but they are all birds. There are many species of mammals but they are all mammals. The finches are a good example of genetic drift.