[CaptRon]

Uh, that’s what Darwin found on the Galapogos Islands.

[muawiyah]

Not to be argumentative or anything but Darwin didn't spend enough time in the Galapagos to attempt to interbreed all the different finch varieties.

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!