AUSTIN, Texas — Breaking up may actually not be hard to do, say scientists who’ve found a population of tropical butterflies that may be on its way to a split into two distinct species.

The cause of this particular break-up? A shift in wing color and mate preference.

In a paper published this week in the journal Science, the researchers describe the relationship between diverging color patterns in Heliconius butterflies and the long-term divergence of populations into new and distinct species.

Of course, a few thousand (million) years from now there may very well be no evidence these two came from the same species originally, thus the missing butterfly link will be lost, and creationists of the future will still be complaining that evolution doesn’t exist.