Most sites/books that refer to his adventures there all state "by common agreement of observers ~ or some such ~ there are 13 different species of Darwin's finches ~ give or take 2 or 3" ~ which means that even now "they don't know".
I'm sure we could do some in vitro and cross-breed almost all of them. There's more to life than beak size and shape after all!
On the other hand, maybe he just missed that creation of a new species by a day, after he left.
Wait, this is all based on species within the finch?
So it could be said that races are the same with the finch theory, right? I mean if you put a mongoloid on an island with a negroid, eventually they would breed their own race. This would not make them NON-human.
The part that I don’t understand is how we went from bacteria, to blobby fish, to upright humans.
This finch thing has thrown a loop into what little I was accepting on evolution on a large scale. Now it makes even less sense!